TY  - CONF
AU  - Peković, Ognjen
AU  - Aleksić, Ivan
AU  - Svorcan, Jelena
AU  - Volf, Goran
AU  - Matić, Dušan
AU  - Kirin, Snežana
AU  - Mitrović, Nenad
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7701
AB  - The pantograph’s purpose is to transfer electrical power from the overhead contact line to the train’s electric propulsion unit. To perform its function adequately, it is necessary to maintain the static contact force between the pantograph and the contact line within the values prescribed by appropriate standards for the entire extension range of the pantograph. The requirement to reach high contact lines complicates the kinematic scheme because the deviation of the trajectory of the pantograph’s collector head from vertical is also prescribed by standards. Further, the structural design of the pantograph is challenging because the greater slenderness ratio of the structure makes it difficult to meet the requirements in terms of stiffness and resistance to vibrations. While at low speeds aerodynamic forces are usually neglected, in high-speed pantographs, they have a significant impact and it is necessary to compensate for them. An aggravating circumstance is the
requirement that the pantograph should work in both knuckle-downstream and knuckle-upstream directions. This paper aims to present the development of a high-speed high–reach pantograph that is developed through the cooperation of company Minel General Electric and the University of Belgrade – Faculty of Mechanical Engineering as well as to present innovative designs of 
 gravitational and aerodynamical compensations that enabled the satisfaction of requested requirements in terms of geometric and static performance.
PB  - University of Belgrade - Faculty of Mechanical Engineering
C3  - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2023
T1  - DEVELOPMENT OF HIGH-REACH PANTOGRAPHS FOR HIGH-SPEED RAILWAYS
SP  - 97
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7701
ER  - 

@conference{
author = "Peković, Ognjen and Aleksić, Ivan and Svorcan, Jelena and Volf, Goran and Matić, Dušan and Kirin, Snežana and Mitrović, Nenad",
year = "2023",
abstract = "The pantograph’s purpose is to transfer electrical power from the overhead contact line to the train’s electric propulsion unit. To perform its function adequately, it is necessary to maintain the static contact force between the pantograph and the contact line within the values prescribed by appropriate standards for the entire extension range of the pantograph. The requirement to reach high contact lines complicates the kinematic scheme because the deviation of the trajectory of the pantograph’s collector head from vertical is also prescribed by standards. Further, the structural design of the pantograph is challenging because the greater slenderness ratio of the structure makes it difficult to meet the requirements in terms of stiffness and resistance to vibrations. While at low speeds aerodynamic forces are usually neglected, in high-speed pantographs, they have a significant impact and it is necessary to compensate for them. An aggravating circumstance is the
requirement that the pantograph should work in both knuckle-downstream and knuckle-upstream directions. This paper aims to present the development of a high-speed high–reach pantograph that is developed through the cooperation of company Minel General Electric and the University of Belgrade – Faculty of Mechanical Engineering as well as to present innovative designs of 
 gravitational and aerodynamical compensations that enabled the satisfaction of requested requirements in terms of geometric and static performance.",
publisher = "University of Belgrade - Faculty of Mechanical Engineering",
journal = "International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2023",
title = "DEVELOPMENT OF HIGH-REACH PANTOGRAPHS FOR HIGH-SPEED RAILWAYS",
pages = "97",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7701"
}

Peković, O., Aleksić, I., Svorcan, J., Volf, G., Matić, D., Kirin, S.,& Mitrović, N.. (2023). DEVELOPMENT OF HIGH-REACH PANTOGRAPHS FOR HIGH-SPEED RAILWAYS. in International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2023
University of Belgrade - Faculty of Mechanical Engineering., 97.
https://hdl.handle.net/21.15107/rcub_machinery_7701

Peković O, Aleksić I, Svorcan J, Volf G, Matić D, Kirin S, Mitrović N. DEVELOPMENT OF HIGH-REACH PANTOGRAPHS FOR HIGH-SPEED RAILWAYS. in International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2023. 2023;:97.
https://hdl.handle.net/21.15107/rcub_machinery_7701 .

Peković, Ognjen, Aleksić, Ivan, Svorcan, Jelena, Volf, Goran, Matić, Dušan, Kirin, Snežana, Mitrović, Nenad, "DEVELOPMENT OF HIGH-REACH PANTOGRAPHS FOR HIGH-SPEED RAILWAYS" in International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2023 (2023):97,
https://hdl.handle.net/21.15107/rcub_machinery_7701 .

Karakoc, H., Kostić, I., Grbović, A., Svorcan, J., Dalkiran, A., Ercan, A. H.,& Peković, O.. (2023). Novel Techniques in Maintenance, Repair, and Overhaul. in Proceedings of the International Symposium on Aviation Technology, MRO, and Operations 2022
Springer, Cham...
https://doi.org/10.1007/978-3-031-42041-2

Karakoc H, Kostić I, Grbović A, Svorcan J, Dalkiran A, Ercan AH, Peković O. Novel Techniques in Maintenance, Repair, and Overhaul. in Proceedings of the International Symposium on Aviation Technology, MRO, and Operations 2022. 2023;.
doi:10.1007/978-3-031-42041-2 .

Karakoc, Hikmet, Kostić, Ivan, Grbović, Aleksandar, Svorcan, Jelena, Dalkiran, Alper, Ercan, Ali Haydar, Peković, Ognjen, "Novel Techniques in Maintenance, Repair, and Overhaul" in Proceedings of the International Symposium on Aviation Technology, MRO, and Operations 2022 (2023),
https://doi.org/10.1007/978-3-031-42041-2 . .

TY  - CONF
AU  - Trivković, Zorana
AU  - Svorcan, Jelena
AU  - Baltić, Marija
AU  - Zorić, Nemanja
AU  - Peković, Ognjen
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3808
AB  - Vertical-axis wind turbines, despite being somewhat uncommon and less efficient renewable energy converters, still offer many advantages to small consumers and possibilities for further improvement. Their rotor is usually made up of fiber-glass composite blades that can be optimized both aerodynamically and/or structurally. Although the aerodynamics of vertical-axis wind turbine rotors is unsteady, complex and challenging to simulate, it is possible to make a sufficiently accurate estimation of variable aerodynamic loads acting on the blade and use them for its structural dimensioning. This research combines a multi-objective constrained optimization procedure by particle swarm and finite element method with experimental analyses with the purpose of defining the best blade, i.e. the blade of minimal mass, least tip deflection under the loading case corresponding to the aerodynamically most demanding operational regime, greatest difference between its natural frequencies and rated rotor angular frequency, lowest manufacturing cost and complexity, etc. Imposed constraints also include acceptable failure criteria along the blade. Design variables refer to ply lay-up scheme, i.e. lamina thicknesses and orientations. Final solution, chosen from the obtained Pareto set, was manufactured and experimentally validated. The consistency of strains, measured in several different cases of bending, and corresponding numerical values was mostly below 8%. The study demonstrates the applicability of the employed multi-objective optimization methodology in wind turbine blade design. It also proposes an affordable and structurally reliable composite lay-up scheme specifically designed for small-scale vertical-axis wind turbines.
PB  - Springer Science and Business Media Deutschland GmbH
C3  - Lecture Notes in Networks and Systems
T1  - Multi-objective optimization and experimental testing of a laminated vertical-axis wind turbine blade
EP  - 65
SP  - 39
VL  - 323
DO  - 10.1007/978-3-030-86009-7_3
ER  - 

@conference{
author = "Trivković, Zorana and Svorcan, Jelena and Baltić, Marija and Zorić, Nemanja and Peković, Ognjen",
year = "2022",
abstract = "Vertical-axis wind turbines, despite being somewhat uncommon and less efficient renewable energy converters, still offer many advantages to small consumers and possibilities for further improvement. Their rotor is usually made up of fiber-glass composite blades that can be optimized both aerodynamically and/or structurally. Although the aerodynamics of vertical-axis wind turbine rotors is unsteady, complex and challenging to simulate, it is possible to make a sufficiently accurate estimation of variable aerodynamic loads acting on the blade and use them for its structural dimensioning. This research combines a multi-objective constrained optimization procedure by particle swarm and finite element method with experimental analyses with the purpose of defining the best blade, i.e. the blade of minimal mass, least tip deflection under the loading case corresponding to the aerodynamically most demanding operational regime, greatest difference between its natural frequencies and rated rotor angular frequency, lowest manufacturing cost and complexity, etc. Imposed constraints also include acceptable failure criteria along the blade. Design variables refer to ply lay-up scheme, i.e. lamina thicknesses and orientations. Final solution, chosen from the obtained Pareto set, was manufactured and experimentally validated. The consistency of strains, measured in several different cases of bending, and corresponding numerical values was mostly below 8%. The study demonstrates the applicability of the employed multi-objective optimization methodology in wind turbine blade design. It also proposes an affordable and structurally reliable composite lay-up scheme specifically designed for small-scale vertical-axis wind turbines.",
publisher = "Springer Science and Business Media Deutschland GmbH",
journal = "Lecture Notes in Networks and Systems",
title = "Multi-objective optimization and experimental testing of a laminated vertical-axis wind turbine blade",
pages = "65-39",
volume = "323",
doi = "10.1007/978-3-030-86009-7_3"
}

Trivković, Z., Svorcan, J., Baltić, M., Zorić, N.,& Peković, O.. (2022). Multi-objective optimization and experimental testing of a laminated vertical-axis wind turbine blade. in Lecture Notes in Networks and Systems
Springer Science and Business Media Deutschland GmbH., 323, 39-65.
https://doi.org/10.1007/978-3-030-86009-7_3

Trivković Z, Svorcan J, Baltić M, Zorić N, Peković O. Multi-objective optimization and experimental testing of a laminated vertical-axis wind turbine blade. in Lecture Notes in Networks and Systems. 2022;323:39-65.
doi:10.1007/978-3-030-86009-7_3 .

Trivković, Zorana, Svorcan, Jelena, Baltić, Marija, Zorić, Nemanja, Peković, Ognjen, "Multi-objective optimization and experimental testing of a laminated vertical-axis wind turbine blade" in Lecture Notes in Networks and Systems, 323 (2022):39-65,
https://doi.org/10.1007/978-3-030-86009-7_3 . .

TY  - CHAP
AU  - Svorcan, Jelena
AU  - Baltić, Marija
AU  - Peković, Ognjen
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3679
AB  - The past few decades have been marked by an immense interest of the scientific community in making better use of renewable energy resources, particularly wind energy. One of the suggestions is to increase the number of small-scale vertical-axis wind turbines (VAWTs) in densely populated areas. Given that VAWTs primarily operate in adverse conditions (irregular wind speeds, Earth’s boundary layer, vortex trail of surrounding objects), it is necessary to pay special attention to the numerical and experimental estimation of their aerodynamic performances. The conceptual design of small-scale wind turbines usually begins with detailed simulations of the encompassing flow field. There are three categories of most often employed computational methods for Darrieus-type VAWTs: i) quasi 1D momentum models frequently upgraded by blade element theory, ii) vortex models and iii) computational fluid dynamics (CFD) approach that enables modeling the complete flow field. Each of these methods is founded on a particular set of assumptions, has its advantages and disadvantages and can provide different numerical results, although engineers are usually mostly interested in accurately estimating power coefficient curves. This paper describes and references some of the realized and tested small-scale VAWTs. It also accentuates modeling possibilities as well as several dilemmas, challenges and errors that may appear while performing complex, unsteady aerodynamic analyses of fluid flows encompassing VAWTs. The main goal of the paper is to provide useful guidelines for successful design of small-scale VAWTs for urban environments.
PB  - Springer
T2  - Lecture Notes in Networks and Systems
T1  - Computing aerodynamic performances of small-scale vertical-axis wind turbines: Possibilities and challenges
EP  - 111
SP  - 91
VL  - 153
DO  - 10.1007/978-3-030-58362-0_7
ER  - 

@inbook{
author = "Svorcan, Jelena and Baltić, Marija and Peković, Ognjen",
year = "2021",
abstract = "The past few decades have been marked by an immense interest of the scientific community in making better use of renewable energy resources, particularly wind energy. One of the suggestions is to increase the number of small-scale vertical-axis wind turbines (VAWTs) in densely populated areas. Given that VAWTs primarily operate in adverse conditions (irregular wind speeds, Earth’s boundary layer, vortex trail of surrounding objects), it is necessary to pay special attention to the numerical and experimental estimation of their aerodynamic performances. The conceptual design of small-scale wind turbines usually begins with detailed simulations of the encompassing flow field. There are three categories of most often employed computational methods for Darrieus-type VAWTs: i) quasi 1D momentum models frequently upgraded by blade element theory, ii) vortex models and iii) computational fluid dynamics (CFD) approach that enables modeling the complete flow field. Each of these methods is founded on a particular set of assumptions, has its advantages and disadvantages and can provide different numerical results, although engineers are usually mostly interested in accurately estimating power coefficient curves. This paper describes and references some of the realized and tested small-scale VAWTs. It also accentuates modeling possibilities as well as several dilemmas, challenges and errors that may appear while performing complex, unsteady aerodynamic analyses of fluid flows encompassing VAWTs. The main goal of the paper is to provide useful guidelines for successful design of small-scale VAWTs for urban environments.",
publisher = "Springer",
journal = "Lecture Notes in Networks and Systems",
booktitle = "Computing aerodynamic performances of small-scale vertical-axis wind turbines: Possibilities and challenges",
pages = "111-91",
volume = "153",
doi = "10.1007/978-3-030-58362-0_7"
}

Svorcan, J., Baltić, M.,& Peković, O.. (2021). Computing aerodynamic performances of small-scale vertical-axis wind turbines: Possibilities and challenges. in Lecture Notes in Networks and Systems
Springer., 153, 91-111.
https://doi.org/10.1007/978-3-030-58362-0_7

Svorcan J, Baltić M, Peković O. Computing aerodynamic performances of small-scale vertical-axis wind turbines: Possibilities and challenges. in Lecture Notes in Networks and Systems. 2021;153:91-111.
doi:10.1007/978-3-030-58362-0_7 .

Svorcan, Jelena, Baltić, Marija, Peković, Ognjen, "Computing aerodynamic performances of small-scale vertical-axis wind turbines: Possibilities and challenges" in Lecture Notes in Networks and Systems, 153 (2021):91-111,
https://doi.org/10.1007/978-3-030-58362-0_7 . .

TY  - CONF
AU  - Trivković, Zorana
AU  - Svorcan, Jelena
AU  - Baltić, Marija
AU  - Zorić, Nemanja
AU  - Peković, Ognjen
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4258
AB  - Although less efficient than their horizontal-axis counterparts, vertical-axis wind turbines (VAWTs) present an interesting research topic as well as a renewable energy converter with lots of potential for application in both urban and secluded rural environments. This is mostly due to the fact that lift-type VAWTs require lower cut-in speeds, can operate in variable wind profiles, and produce low-level noise. Particularly interesting are small-scale machines that operate in low Reynolds numbers where viscosity effects are particularly noticeable.
The design of a small-scale composite vertical-axis wind turbine blade comprises several steps. First, the blade should be modelled and the expected aerodynamic loads should be estimated with sufficient accuracy. Secondly, structural analysis of its composite elements should be performed for various load cases (including conjugate aerodynamic, inertial, and gravitational loads at different wind speeds and/or wind turbine rotor angular velocities). Finally, manufacturing technology should be defined and the blade should be manufactured as well as experimentally tested so that the starting computational models can be assessed and validated.
The goal of the presented research study is to conduct a complete design process of a small-scale VAWT blade. Aerodynamic loads are numerically estimated by the finite volume method, while structural analysis of the blade is performed by the finite element method. Additionally, the lay-up sequence of the blade inner composite structure is optimized by the particle swarm method. In the end, the designed blade is produced by a wet lay-up manufacturing process. The consistency of strains, measured in several different cases of blade bending, and corresponding numerical values were mostly below 8% which justifies the adopted design procedure.
PB  - Belgrade : Innovation Center of Faculty of Mechanical Engineering
C3  - The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH
T1  - Design of small-scale composite vertical-axis wind turbine blade
SP  - 68
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4258
ER  - 

@conference{
author = "Trivković, Zorana and Svorcan, Jelena and Baltić, Marija and Zorić, Nemanja and Peković, Ognjen",
year = "2021",
abstract = "Although less efficient than their horizontal-axis counterparts, vertical-axis wind turbines (VAWTs) present an interesting research topic as well as a renewable energy converter with lots of potential for application in both urban and secluded rural environments. This is mostly due to the fact that lift-type VAWTs require lower cut-in speeds, can operate in variable wind profiles, and produce low-level noise. Particularly interesting are small-scale machines that operate in low Reynolds numbers where viscosity effects are particularly noticeable.
The design of a small-scale composite vertical-axis wind turbine blade comprises several steps. First, the blade should be modelled and the expected aerodynamic loads should be estimated with sufficient accuracy. Secondly, structural analysis of its composite elements should be performed for various load cases (including conjugate aerodynamic, inertial, and gravitational loads at different wind speeds and/or wind turbine rotor angular velocities). Finally, manufacturing technology should be defined and the blade should be manufactured as well as experimentally tested so that the starting computational models can be assessed and validated.
The goal of the presented research study is to conduct a complete design process of a small-scale VAWT blade. Aerodynamic loads are numerically estimated by the finite volume method, while structural analysis of the blade is performed by the finite element method. Additionally, the lay-up sequence of the blade inner composite structure is optimized by the particle swarm method. In the end, the designed blade is produced by a wet lay-up manufacturing process. The consistency of strains, measured in several different cases of blade bending, and corresponding numerical values were mostly below 8% which justifies the adopted design procedure.",
publisher = "Belgrade : Innovation Center of Faculty of Mechanical Engineering",
journal = "The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH",
title = "Design of small-scale composite vertical-axis wind turbine blade",
pages = "68",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4258"
}

Trivković, Z., Svorcan, J., Baltić, M., Zorić, N.,& Peković, O.. (2021). Design of small-scale composite vertical-axis wind turbine blade. in The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH
Belgrade : Innovation Center of Faculty of Mechanical Engineering., 68.
https://hdl.handle.net/21.15107/rcub_machinery_4258

Trivković Z, Svorcan J, Baltić M, Zorić N, Peković O. Design of small-scale composite vertical-axis wind turbine blade. in The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH. 2021;:68.
https://hdl.handle.net/21.15107/rcub_machinery_4258 .

Trivković, Zorana, Svorcan, Jelena, Baltić, Marija, Zorić, Nemanja, Peković, Ognjen, "Design of small-scale composite vertical-axis wind turbine blade" in The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH (2021):68,
https://hdl.handle.net/21.15107/rcub_machinery_4258 .

TY  - CONF
AU  - Svorcan, Jelena
AU  - Peković, Ognjen
AU  - Ivanov, Toni
AU  - Baltić, Marija
AU  - Simonović, Aleksandar
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4257
AB  - Open systems, that include both water and air fractions, and whose behavior is highly dominated by the interaction between these two phases are particularly important and interesting for many industrial applications (e.g. energy production, maritime and aerial transport, food resources). Since the physics governing these flows is highly complex and incorporates many unexplained phenomena, novel physical models, as well as measurement techniques, are still being developed and tested in accordance with the particular problem that is being analyzed. Although real engineering cases often involve wind-wave interactions, stochastic waves, geometrically irregular boundaries, turbulence, wave interference etc, the main interests of this work are the effects of oncoming wind speed as well as adopted turbulence model on the initially still water surface and consequential wave formation. These aspects have to be considered in the development of amphibian aircrafts or ekranoplans since they take off from water surfaces while later aircrafts operate in the vicinity of water during the entire flight. Wave formation is also extremely important
for off-shore wind turbines. For the sake of simplicity, the conducted numerical simulations are planar. The fluids (air and water) are considered incompressible, while the flow is unsteady and turbulent. The unsteady Reynolds averaged Navier-Stokes equations are closed by one of the two two-equation turbulence models based on the Boussinesq hypothesis: realizable k-ε or k-ω SST model. The investigated wind speeds are 30 m/s, 50 m/s and 80 m/s, while the results are presented in the shape of water volume fractions. As expected, the increase in wind speed induces higher amplitude waves, when the effects of turbulence models also become important.
PB  - International Association for Hydro-Environment Engineering and Research (IAHR)
C3  - Abstract Book - 6th IAHR Europe Congress
T1  - The effects of wind speed and turbulence model on wave formation in open systems
EP  - 860
SP  - 859
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4257
ER  - 

@conference{
author = "Svorcan, Jelena and Peković, Ognjen and Ivanov, Toni and Baltić, Marija and Simonović, Aleksandar",
year = "2021",
abstract = "Open systems, that include both water and air fractions, and whose behavior is highly dominated by the interaction between these two phases are particularly important and interesting for many industrial applications (e.g. energy production, maritime and aerial transport, food resources). Since the physics governing these flows is highly complex and incorporates many unexplained phenomena, novel physical models, as well as measurement techniques, are still being developed and tested in accordance with the particular problem that is being analyzed. Although real engineering cases often involve wind-wave interactions, stochastic waves, geometrically irregular boundaries, turbulence, wave interference etc, the main interests of this work are the effects of oncoming wind speed as well as adopted turbulence model on the initially still water surface and consequential wave formation. These aspects have to be considered in the development of amphibian aircrafts or ekranoplans since they take off from water surfaces while later aircrafts operate in the vicinity of water during the entire flight. Wave formation is also extremely important
for off-shore wind turbines. For the sake of simplicity, the conducted numerical simulations are planar. The fluids (air and water) are considered incompressible, while the flow is unsteady and turbulent. The unsteady Reynolds averaged Navier-Stokes equations are closed by one of the two two-equation turbulence models based on the Boussinesq hypothesis: realizable k-ε or k-ω SST model. The investigated wind speeds are 30 m/s, 50 m/s and 80 m/s, while the results are presented in the shape of water volume fractions. As expected, the increase in wind speed induces higher amplitude waves, when the effects of turbulence models also become important.",
publisher = "International Association for Hydro-Environment Engineering and Research (IAHR)",
journal = "Abstract Book - 6th IAHR Europe Congress",
title = "The effects of wind speed and turbulence model on wave formation in open systems",
pages = "860-859",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4257"
}

Svorcan, J., Peković, O., Ivanov, T., Baltić, M.,& Simonović, A.. (2021). The effects of wind speed and turbulence model on wave formation in open systems. in Abstract Book - 6th IAHR Europe Congress
International Association for Hydro-Environment Engineering and Research (IAHR)., 859-860.
https://hdl.handle.net/21.15107/rcub_machinery_4257

Svorcan J, Peković O, Ivanov T, Baltić M, Simonović A. The effects of wind speed and turbulence model on wave formation in open systems. in Abstract Book - 6th IAHR Europe Congress. 2021;:859-860.
https://hdl.handle.net/21.15107/rcub_machinery_4257 .

Svorcan, Jelena, Peković, Ognjen, Ivanov, Toni, Baltić, Marija, Simonović, Aleksandar, "The effects of wind speed and turbulence model on wave formation in open systems" in Abstract Book - 6th IAHR Europe Congress (2021):859-860,
https://hdl.handle.net/21.15107/rcub_machinery_4257 .

TY  - JOUR
AU  - Svorcan, Jelena
AU  - Peković, Ognjen
AU  - Simonović, Aleksandar
AU  - Tanović, Dragoljub
AU  - Hasan, Mohammad Sakib
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3547
AB  - Wind energy extraction is one of the fastest developing engineering branches today. Number of installed wind turbines is constantly increasing. Appropriate solutions for urban environments are quiet, structurally simple and affordable small-scale vertical-axis wind turbines (VAWTs). Due to small efficiency, particularly in low and variable winds, main topic here is development of optimal flow concentrator that locally augments wind velocity, facilitates turbine start and increases generated power. Conceptual design was performed by combining finite volume method and artificial intelligence (AI). Smaller set of computational results (velocity profiles induced by existence of different concentrators in flow field) was used for creation, training and validation of several artificial neural networks. Multi-objective optimization of concentrator geometric parameters was realized through coupling of generated neural networks with genetic algorithm. Final solution from the acquired Pareto set is studied in more detail. Resulting computed velocity field is illustrated. Aerodynamic performances of small-scale VAWT with and without optimal flow concentrator are estimated and compared. The performed research demonstrates that, with use of flow concentrator, average increase in wind speed of 20%-25% can be expected. It also proves that contemporary AI techniques can significantly facilitate and accelerate design processes in the field of wind engineering.
PB  - Sage Publications Ltd, London
T2  - Advances in Mechanical Engineering
T1  - Design of optimal flow concentrator for vertical-axis wind turbines using computational fluid dynamics, artificial neural networks and genetic algorithm
IS  - 3
VL  - 13
DO  - 10.1177/16878140211009009
ER  - 

@article{
author = "Svorcan, Jelena and Peković, Ognjen and Simonović, Aleksandar and Tanović, Dragoljub and Hasan, Mohammad Sakib",
year = "2021",
abstract = "Wind energy extraction is one of the fastest developing engineering branches today. Number of installed wind turbines is constantly increasing. Appropriate solutions for urban environments are quiet, structurally simple and affordable small-scale vertical-axis wind turbines (VAWTs). Due to small efficiency, particularly in low and variable winds, main topic here is development of optimal flow concentrator that locally augments wind velocity, facilitates turbine start and increases generated power. Conceptual design was performed by combining finite volume method and artificial intelligence (AI). Smaller set of computational results (velocity profiles induced by existence of different concentrators in flow field) was used for creation, training and validation of several artificial neural networks. Multi-objective optimization of concentrator geometric parameters was realized through coupling of generated neural networks with genetic algorithm. Final solution from the acquired Pareto set is studied in more detail. Resulting computed velocity field is illustrated. Aerodynamic performances of small-scale VAWT with and without optimal flow concentrator are estimated and compared. The performed research demonstrates that, with use of flow concentrator, average increase in wind speed of 20%-25% can be expected. It also proves that contemporary AI techniques can significantly facilitate and accelerate design processes in the field of wind engineering.",
publisher = "Sage Publications Ltd, London",
journal = "Advances in Mechanical Engineering",
title = "Design of optimal flow concentrator for vertical-axis wind turbines using computational fluid dynamics, artificial neural networks and genetic algorithm",
number = "3",
volume = "13",
doi = "10.1177/16878140211009009"
}

Svorcan, J., Peković, O., Simonović, A., Tanović, D.,& Hasan, M. S.. (2021). Design of optimal flow concentrator for vertical-axis wind turbines using computational fluid dynamics, artificial neural networks and genetic algorithm. in Advances in Mechanical Engineering
Sage Publications Ltd, London., 13(3).
https://doi.org/10.1177/16878140211009009

Svorcan J, Peković O, Simonović A, Tanović D, Hasan MS. Design of optimal flow concentrator for vertical-axis wind turbines using computational fluid dynamics, artificial neural networks and genetic algorithm. in Advances in Mechanical Engineering. 2021;13(3).
doi:10.1177/16878140211009009 .

Svorcan, Jelena, Peković, Ognjen, Simonović, Aleksandar, Tanović, Dragoljub, Hasan, Mohammad Sakib, "Design of optimal flow concentrator for vertical-axis wind turbines using computational fluid dynamics, artificial neural networks and genetic algorithm" in Advances in Mechanical Engineering, 13, no. 3 (2021),
https://doi.org/10.1177/16878140211009009 . .

TY  - CHAP
AU  - Ivanov, Toni
AU  - Peković, Ognjen
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3678
AB  - There has been an increased interest in the field of electric power aircraft propulsion systems in recent years mostly due to the technological improvements in power electronics, energy storage and permanent magnet electric motors. This is not unusual since these systems can provide a large increase in efficiency and reliability while decreasing the carbon footprint. In most small and medium size UAVs the fully electric propulsion system is implemented. To obtain a propulsion system with an overall high efficiency one must take into consideration the efficiencies of all individual components as well as their matching meaning that the individual characteristics of all components have to be considered when designing the propulsion system. In this paper a propeller design methodology for a fully electric propulsion system is presented. The electric components were represented via simplified mathematical models while the propeller design was performed by the blade momentum theory with vortex wake deflection including corrections for the tip losses. The airfoil aerodynamic characteristics for different Reynolds numbers were determined by XFOIL and corrected for Mach number and post stall effects due to rotation. An off-design point analysis of the designed propeller was then performed and discussed. It was shown that an efficient fully electric propulsion system for initial design purposes can be created with the methodology. Some recommendations regarding the limitations and the possible improvements are also given in the paper.
PB  - Springer
T2  - Lecture Notes in Networks and Systems
T1  - Design and analysis of an optimal electric propulsion system propeller
EP  - 166
SP  - 147
VL  - 153
DO  - 10.1007/978-3-030-58362-0_10
ER  - 

@inbook{
author = "Ivanov, Toni and Peković, Ognjen",
year = "2021",
abstract = "There has been an increased interest in the field of electric power aircraft propulsion systems in recent years mostly due to the technological improvements in power electronics, energy storage and permanent magnet electric motors. This is not unusual since these systems can provide a large increase in efficiency and reliability while decreasing the carbon footprint. In most small and medium size UAVs the fully electric propulsion system is implemented. To obtain a propulsion system with an overall high efficiency one must take into consideration the efficiencies of all individual components as well as their matching meaning that the individual characteristics of all components have to be considered when designing the propulsion system. In this paper a propeller design methodology for a fully electric propulsion system is presented. The electric components were represented via simplified mathematical models while the propeller design was performed by the blade momentum theory with vortex wake deflection including corrections for the tip losses. The airfoil aerodynamic characteristics for different Reynolds numbers were determined by XFOIL and corrected for Mach number and post stall effects due to rotation. An off-design point analysis of the designed propeller was then performed and discussed. It was shown that an efficient fully electric propulsion system for initial design purposes can be created with the methodology. Some recommendations regarding the limitations and the possible improvements are also given in the paper.",
publisher = "Springer",
journal = "Lecture Notes in Networks and Systems",
booktitle = "Design and analysis of an optimal electric propulsion system propeller",
pages = "166-147",
volume = "153",
doi = "10.1007/978-3-030-58362-0_10"
}

Ivanov, T.,& Peković, O.. (2021). Design and analysis of an optimal electric propulsion system propeller. in Lecture Notes in Networks and Systems
Springer., 153, 147-166.
https://doi.org/10.1007/978-3-030-58362-0_10

Ivanov T, Peković O. Design and analysis of an optimal electric propulsion system propeller. in Lecture Notes in Networks and Systems. 2021;153:147-166.
doi:10.1007/978-3-030-58362-0_10 .

Ivanov, Toni, Peković, Ognjen, "Design and analysis of an optimal electric propulsion system propeller" in Lecture Notes in Networks and Systems, 153 (2021):147-166,
https://doi.org/10.1007/978-3-030-58362-0_10 . .

TY  - CONF
AU  - Baltić, Marija
AU  - Svorcan, Jelena
AU  - Peković, Ognjen
AU  - Ivanov, Toni
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3270
AB  - The paper presents the comparative analysis of the dynamic behavior of two rectangular plates of different material, aluminum and composite. While their global geometric dimensions (length, width and thickness) are similar, their inner structures are quite different. Whereas aluminum plate can be considered isotropic, the composite plate is a unidirectional carbon-epoxy laminate. Modal characteristics of the two plates were determined both numerically and experimentally and a comparative analysis of the obtained results was performed. Responses of the plates were documented by an optical, contactless 3D digital image correlation (DIC) system that contains a set of high-speed cameras capable of recording the movement of the white-and-black stochastic pattern applied to the upper surfaces of the plates. Numerical simulations were performed by the finite element method (FEM) in the commercial software package ANSYS. The plates were excited by a modal hammer and allowed to freely oscillate. In order to determine the natural frequencies of the plates the recorded time-domain responses were post-processed, i.e. converted to the frequency domain by fast Fourier transform (FFT). The first three natural modes were successfully experimentally established and compared to the corresponding numerical values. Since the differences between the two sets of results are less than 5%, the applied experimental technique can be considered valid and suitable for a wide range of engineering problems involving vibrations.
PB  - Springer International Publishing Ag, Cham
C3  - Computational and Experimental Approaches in Materials Science and Engineering, Cnntech 2019
T1  - Comparative Numerical and Experimental Modal Analysis of Aluminum and Composite Plates
EP  - 75
SP  - 61
VL  - 90
DO  - 10.1007/978-3-030-30853-7_4
ER  - 

@conference{
author = "Baltić, Marija and Svorcan, Jelena and Peković, Ognjen and Ivanov, Toni",
year = "2020",
abstract = "The paper presents the comparative analysis of the dynamic behavior of two rectangular plates of different material, aluminum and composite. While their global geometric dimensions (length, width and thickness) are similar, their inner structures are quite different. Whereas aluminum plate can be considered isotropic, the composite plate is a unidirectional carbon-epoxy laminate. Modal characteristics of the two plates were determined both numerically and experimentally and a comparative analysis of the obtained results was performed. Responses of the plates were documented by an optical, contactless 3D digital image correlation (DIC) system that contains a set of high-speed cameras capable of recording the movement of the white-and-black stochastic pattern applied to the upper surfaces of the plates. Numerical simulations were performed by the finite element method (FEM) in the commercial software package ANSYS. The plates were excited by a modal hammer and allowed to freely oscillate. In order to determine the natural frequencies of the plates the recorded time-domain responses were post-processed, i.e. converted to the frequency domain by fast Fourier transform (FFT). The first three natural modes were successfully experimentally established and compared to the corresponding numerical values. Since the differences between the two sets of results are less than 5%, the applied experimental technique can be considered valid and suitable for a wide range of engineering problems involving vibrations.",
publisher = "Springer International Publishing Ag, Cham",
journal = "Computational and Experimental Approaches in Materials Science and Engineering, Cnntech 2019",
title = "Comparative Numerical and Experimental Modal Analysis of Aluminum and Composite Plates",
pages = "75-61",
volume = "90",
doi = "10.1007/978-3-030-30853-7_4"
}

Baltić, M., Svorcan, J., Peković, O.,& Ivanov, T.. (2020). Comparative Numerical and Experimental Modal Analysis of Aluminum and Composite Plates. in Computational and Experimental Approaches in Materials Science and Engineering, Cnntech 2019
Springer International Publishing Ag, Cham., 90, 61-75.
https://doi.org/10.1007/978-3-030-30853-7_4

Baltić M, Svorcan J, Peković O, Ivanov T. Comparative Numerical and Experimental Modal Analysis of Aluminum and Composite Plates. in Computational and Experimental Approaches in Materials Science and Engineering, Cnntech 2019. 2020;90:61-75.
doi:10.1007/978-3-030-30853-7_4 .

Baltić, Marija, Svorcan, Jelena, Peković, Ognjen, Ivanov, Toni, "Comparative Numerical and Experimental Modal Analysis of Aluminum and Composite Plates" in Computational and Experimental Approaches in Materials Science and Engineering, Cnntech 2019, 90 (2020):61-75,
https://doi.org/10.1007/978-3-030-30853-7_4 . .

TY  - CONF
AU  - Tanović, Dragoljub Lj.
AU  - Svorcan, Jelena
AU  - Peković, Ognjen
AU  - Hasan, Mohammad Sakib
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4284
AB  - Rastuća zabrinutost zbog globalnog zagrevanja, zagađenja životne sredine i poskupljenja fosilnih goriva doveli su do interesovanja za razvoj obnovljivih i ekološki prihvatljivih izvora energije. Stoga istraživanja u oblasti obnovljivih izvora, posebno energije vetra, postaju izuzetno aktuelna. U radu je izvršena aerodinamička analiza vetroturbina sa vertikalnom osom obrtanja - VAWT, koje imaju različite aeroprofile. Korišćene su dve metode BEM - Blade Element Momentum i DMS - Double Multiple Streamtube, obično usvojene za rani dizajn i ocenu turbina. U radu je korišćen program Qblade, a dobijeni rezultati snage u zavisnosti od brzine vetra omogućuvaju upoređivanje performansi vetroturbine.
PB  - Univerzitet u Beogradu - Mašinski fakultet
C3  - Zbornik radova sa 42. JUPITER konferencije, 29. CAD/CAM simpozijum
T1  - Analiza performansi vetroturbina različitih aeroprofila
EP  - 2.40
SP  - 2.33
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4284
ER  - 

@conference{
author = "Tanović, Dragoljub Lj. and Svorcan, Jelena and Peković, Ognjen and Hasan, Mohammad Sakib",
year = "2020",
abstract = "Rastuća zabrinutost zbog globalnog zagrevanja, zagađenja životne sredine i poskupljenja fosilnih goriva doveli su do interesovanja za razvoj obnovljivih i ekološki prihvatljivih izvora energije. Stoga istraživanja u oblasti obnovljivih izvora, posebno energije vetra, postaju izuzetno aktuelna. U radu je izvršena aerodinamička analiza vetroturbina sa vertikalnom osom obrtanja - VAWT, koje imaju različite aeroprofile. Korišćene su dve metode BEM - Blade Element Momentum i DMS - Double Multiple Streamtube, obično usvojene za rani dizajn i ocenu turbina. U radu je korišćen program Qblade, a dobijeni rezultati snage u zavisnosti od brzine vetra omogućuvaju upoređivanje performansi vetroturbine.",
publisher = "Univerzitet u Beogradu - Mašinski fakultet",
journal = "Zbornik radova sa 42. JUPITER konferencije, 29. CAD/CAM simpozijum",
title = "Analiza performansi vetroturbina različitih aeroprofila",
pages = "2.40-2.33",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4284"
}

Tanović, D. Lj., Svorcan, J., Peković, O.,& Hasan, M. S.. (2020). Analiza performansi vetroturbina različitih aeroprofila. in Zbornik radova sa 42. JUPITER konferencije, 29. CAD/CAM simpozijum
Univerzitet u Beogradu - Mašinski fakultet., 2.33-2.40.
https://hdl.handle.net/21.15107/rcub_machinery_4284

Tanović DL, Svorcan J, Peković O, Hasan MS. Analiza performansi vetroturbina različitih aeroprofila. in Zbornik radova sa 42. JUPITER konferencije, 29. CAD/CAM simpozijum. 2020;:2.33-2.40.
https://hdl.handle.net/21.15107/rcub_machinery_4284 .

Tanović, Dragoljub Lj., Svorcan, Jelena, Peković, Ognjen, Hasan, Mohammad Sakib, "Analiza performansi vetroturbina različitih aeroprofila" in Zbornik radova sa 42. JUPITER konferencije, 29. CAD/CAM simpozijum (2020):2.33-2.40,
https://hdl.handle.net/21.15107/rcub_machinery_4284 .

TY  - CONF
AU  - Svorcan, Jelena
AU  - Peković, Ognjen
AU  - Tanović, Dragoljub Lj.
AU  - Hasan, Mohammad Sakib
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4283
AB  - Efikasno iskorišćenje energije vetra (kao jednog od najzastupljenijih obnovljivih izvora energije) je danas veoma aktuelna tema. Mnogo se radi na poboljšanju aerodinamičkih performansi vetroturbina u urbanim sredinama gde je raspoloživi prostor ograničen i postoji mnogo okolnih objekata koji mogu lokalno da unaprede ili unazade nadolazeći profil brzine. Iz tog razloga, često se postavljaju pomoćne geometrije (koncentratori) koje treba da usmere ili povećaju brzinu kroz rotor. Rad prikazuje olakšano određivanje takvog modifikovanog (ubrzanog) profila brzine pomoću sprege numeričkih simulacija opstrujavanja koncentratora i veštačkih neuronskih mreža. Geometrija koncentratora je parametrizovana da bi se postiglo najveće moguće ubrzanje za uslove na određenoj lokaciji.
PB  - Univerzitet u Beogradu - Mašinski fakultet
C3  - Zbornik radova sa 42. JUPITER konferencije, 29. CAD/CAM simpozijum
T1  - Određivanje modifikovanog profila brzine pomoću proračuna opstrujavanja i veštačkih neuronskih mreža
EP  - 2.32
SP  - 2.27
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4283
ER  - 

@conference{
author = "Svorcan, Jelena and Peković, Ognjen and Tanović, Dragoljub Lj. and Hasan, Mohammad Sakib",
year = "2020",
abstract = "Efikasno iskorišćenje energije vetra (kao jednog od najzastupljenijih obnovljivih izvora energije) je danas veoma aktuelna tema. Mnogo se radi na poboljšanju aerodinamičkih performansi vetroturbina u urbanim sredinama gde je raspoloživi prostor ograničen i postoji mnogo okolnih objekata koji mogu lokalno da unaprede ili unazade nadolazeći profil brzine. Iz tog razloga, često se postavljaju pomoćne geometrije (koncentratori) koje treba da usmere ili povećaju brzinu kroz rotor. Rad prikazuje olakšano određivanje takvog modifikovanog (ubrzanog) profila brzine pomoću sprege numeričkih simulacija opstrujavanja koncentratora i veštačkih neuronskih mreža. Geometrija koncentratora je parametrizovana da bi se postiglo najveće moguće ubrzanje za uslove na određenoj lokaciji.",
publisher = "Univerzitet u Beogradu - Mašinski fakultet",
journal = "Zbornik radova sa 42. JUPITER konferencije, 29. CAD/CAM simpozijum",
title = "Određivanje modifikovanog profila brzine pomoću proračuna opstrujavanja i veštačkih neuronskih mreža",
pages = "2.32-2.27",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4283"
}

Svorcan, J., Peković, O., Tanović, D. Lj.,& Hasan, M. S.. (2020). Određivanje modifikovanog profila brzine pomoću proračuna opstrujavanja i veštačkih neuronskih mreža. in Zbornik radova sa 42. JUPITER konferencije, 29. CAD/CAM simpozijum
Univerzitet u Beogradu - Mašinski fakultet., 2.27-2.32.
https://hdl.handle.net/21.15107/rcub_machinery_4283

Svorcan J, Peković O, Tanović DL, Hasan MS. Određivanje modifikovanog profila brzine pomoću proračuna opstrujavanja i veštačkih neuronskih mreža. in Zbornik radova sa 42. JUPITER konferencije, 29. CAD/CAM simpozijum. 2020;:2.27-2.32.
https://hdl.handle.net/21.15107/rcub_machinery_4283 .

Svorcan, Jelena, Peković, Ognjen, Tanović, Dragoljub Lj., Hasan, Mohammad Sakib, "Određivanje modifikovanog profila brzine pomoću proračuna opstrujavanja i veštačkih neuronskih mreža" in Zbornik radova sa 42. JUPITER konferencije, 29. CAD/CAM simpozijum (2020):2.27-2.32,
https://hdl.handle.net/21.15107/rcub_machinery_4283 .

TY  - CONF
AU  - Peković, Ognjen
AU  - Svorcan, Jelena
AU  - Simonović, Aleksandar
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4252
AB  - Isogeometric analysis (IGA) is an extension to conventional Finite Element Method (FEM) developed with the idea of unifying Computer Aided Design (CAD) and Computer Aided Analysis (CAE) into an efficient methodology for structural design and optimization. The isogeometric formulation of finite elements is based on NURBS (non-uniform rational B-splines) basis functions of varying degree, the same functions that are used in CAD for geometry definition. In this way, operation of mesh generation in IGA is unnecessary since the geometry that is defined as parametric representation of NURBS is used for representation of field variables. Behavior of laminated plate elements based on isogeometric formulation and different kinematic models is
presented and different aspects of implementation are discussed. Chosen numerical examples highlight the advantages of the isogeometric laminated plate elements over the conventional finite element formulation of laminated plates.
PB  - Belgrade : Innovation Center of Faculty of Mechanical Engineering
C3  - The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH
T1  - Static isogeometric analysis of laminated composite plates based on different equivalent layer theories
SP  - 63
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4252
ER  - 

@conference{
author = "Peković, Ognjen and Svorcan, Jelena and Simonović, Aleksandar",
year = "2020",
abstract = "Isogeometric analysis (IGA) is an extension to conventional Finite Element Method (FEM) developed with the idea of unifying Computer Aided Design (CAD) and Computer Aided Analysis (CAE) into an efficient methodology for structural design and optimization. The isogeometric formulation of finite elements is based on NURBS (non-uniform rational B-splines) basis functions of varying degree, the same functions that are used in CAD for geometry definition. In this way, operation of mesh generation in IGA is unnecessary since the geometry that is defined as parametric representation of NURBS is used for representation of field variables. Behavior of laminated plate elements based on isogeometric formulation and different kinematic models is
presented and different aspects of implementation are discussed. Chosen numerical examples highlight the advantages of the isogeometric laminated plate elements over the conventional finite element formulation of laminated plates.",
publisher = "Belgrade : Innovation Center of Faculty of Mechanical Engineering",
journal = "The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH",
title = "Static isogeometric analysis of laminated composite plates based on different equivalent layer theories",
pages = "63",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4252"
}

Peković, O., Svorcan, J.,& Simonović, A.. (2020). Static isogeometric analysis of laminated composite plates based on different equivalent layer theories. in The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH
Belgrade : Innovation Center of Faculty of Mechanical Engineering., 63.
https://hdl.handle.net/21.15107/rcub_machinery_4252

Peković O, Svorcan J, Simonović A. Static isogeometric analysis of laminated composite plates based on different equivalent layer theories. in The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH. 2020;:63.
https://hdl.handle.net/21.15107/rcub_machinery_4252 .

Peković, Ognjen, Svorcan, Jelena, Simonović, Aleksandar, "Static isogeometric analysis of laminated composite plates based on different equivalent layer theories" in The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH (2020):63,
https://hdl.handle.net/21.15107/rcub_machinery_4252 .

TY  - CONF
AU  - Tanović, Dragoljub Lj.
AU  - Svorcan, Jelena
AU  - Peković, Ognjen
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4253
AB  - Growing concerns about global warming, environmental pollution and the rise in the price of fossil fuels have led to an interest in developing renewable and environmentally friendly energy sources, such as wind, solar, geothermal, hydrogen and biomass as a replacement for fossil fuels. Therefore, the research of renewable energy, and wind energy in particular, is in constant expansion. Wind energy can provide appropriate solutions to the global climate and energy crisis. The use of wind energy basically eliminates the emission of harmful gases such as CO2, SO2 as in traditional coal-fired power stations or radioactive material waste in nuclear power plants.
There has been a tremendous increase in wind energy worldwide over the last three decades. In 2009, the global yearly installed wind power reached 37 GW, bringing the total wind capacity to 158 GW. As the most promising renewable, clean and most reliable source of clean energy, it is expected to occupy a much larger part in electricity distribution all over the world. Wind turbines are types of power plants that use renewable energy, wind, to generate electricity.
The purpose of this paper is to analyze wind turbine with vertical axis - VAWT, that have two or three blades. Two methods were used for preliminary aerodynamic studies and they are BEM - Blade Element Momentum and DMS - Double Multiple Streamtube, usually adopted for early turbine design and rating. The program used in this work is QBlade. Obtained results enable the comparison of computed power curves of different geometries.
PB  - Belgrade : Innovation Center of Faculty of Mechanical Engineering
C3  - The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH
T1  - Performance analysis of wind turbines with different characteristics
SP  - 60
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4253
ER  - 

@conference{
author = "Tanović, Dragoljub Lj. and Svorcan, Jelena and Peković, Ognjen",
year = "2020",
abstract = "Growing concerns about global warming, environmental pollution and the rise in the price of fossil fuels have led to an interest in developing renewable and environmentally friendly energy sources, such as wind, solar, geothermal, hydrogen and biomass as a replacement for fossil fuels. Therefore, the research of renewable energy, and wind energy in particular, is in constant expansion. Wind energy can provide appropriate solutions to the global climate and energy crisis. The use of wind energy basically eliminates the emission of harmful gases such as CO2, SO2 as in traditional coal-fired power stations or radioactive material waste in nuclear power plants.
There has been a tremendous increase in wind energy worldwide over the last three decades. In 2009, the global yearly installed wind power reached 37 GW, bringing the total wind capacity to 158 GW. As the most promising renewable, clean and most reliable source of clean energy, it is expected to occupy a much larger part in electricity distribution all over the world. Wind turbines are types of power plants that use renewable energy, wind, to generate electricity.
The purpose of this paper is to analyze wind turbine with vertical axis - VAWT, that have two or three blades. Two methods were used for preliminary aerodynamic studies and they are BEM - Blade Element Momentum and DMS - Double Multiple Streamtube, usually adopted for early turbine design and rating. The program used in this work is QBlade. Obtained results enable the comparison of computed power curves of different geometries.",
publisher = "Belgrade : Innovation Center of Faculty of Mechanical Engineering",
journal = "The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH",
title = "Performance analysis of wind turbines with different characteristics",
pages = "60",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4253"
}

Tanović, D. Lj., Svorcan, J.,& Peković, O.. (2020). Performance analysis of wind turbines with different characteristics. in The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH
Belgrade : Innovation Center of Faculty of Mechanical Engineering., 60.
https://hdl.handle.net/21.15107/rcub_machinery_4253

Tanović DL, Svorcan J, Peković O. Performance analysis of wind turbines with different characteristics. in The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH. 2020;:60.
https://hdl.handle.net/21.15107/rcub_machinery_4253 .

Tanović, Dragoljub Lj., Svorcan, Jelena, Peković, Ognjen, "Performance analysis of wind turbines with different characteristics" in The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH (2020):60,
https://hdl.handle.net/21.15107/rcub_machinery_4253 .

TY  - CONF
AU  - Svorcan, Jelena
AU  - Tanović, Dragoljub Lj.
AU  - Peković, Ognjen
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4254
AB  - The past few decades have been marked by an immense interest of the scientific community in making better use of renewable energy sources, particularly wind energy. One of the suggestions is to increase the number of small-scale vertical-axis wind turbines in urban environment. However, given that they mostly operate in adverse conditions (irregular wind speeds, Earth's boundary layer, vortex trail of surrounding objects), it is necessary to pay special attention to the numerical and experimental estimation of their performances. The conceptual design of small-scale wind turbines usually begins with detailed simulations of the encompassing flow field.
Considered medium-solidity wind turbine rotor comprises three straight blades. Its aerodynamic analysis is complex since blades undergo a wide range of angles-of-attack during every rotation. This induces numerous flow instabilities, separation and interaction between the oncoming blade and the vortex trail detached from the previous. Those are some of the main reasons for the decreased efficiency of this type of wind turbines. On the other hand, their main advantages include: structural simplicity, omnidirectional operability as well as operability in "dirty" winds.
Three-dimensional numerical simulations of fluid flow around a small-scale vertical-axis wind turbine have been completed for ten different working regimes. Transient computations of incompressible, viscous flow have been performed by finite volume method. Aerodynamic performances of the investigated rotor in idealized, uniform velocity stream and a power-law profile (corresponding to Earth's boundary layer) have also been compared. Computed values of power coefficient indicate that a performance reduction of 1-4 % can be expected in real working conditions.
PB  - Belgrade : Innovation Center of Faculty of Mechanical Engineering
C3  - The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH
T1  - Effects of ground and velocity profiles on aerodynamic performances of small-scale vertical-axis wind turbines
SP  - 55
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4254
ER  - 

@conference{
author = "Svorcan, Jelena and Tanović, Dragoljub Lj. and Peković, Ognjen",
year = "2020",
abstract = "The past few decades have been marked by an immense interest of the scientific community in making better use of renewable energy sources, particularly wind energy. One of the suggestions is to increase the number of small-scale vertical-axis wind turbines in urban environment. However, given that they mostly operate in adverse conditions (irregular wind speeds, Earth's boundary layer, vortex trail of surrounding objects), it is necessary to pay special attention to the numerical and experimental estimation of their performances. The conceptual design of small-scale wind turbines usually begins with detailed simulations of the encompassing flow field.
Considered medium-solidity wind turbine rotor comprises three straight blades. Its aerodynamic analysis is complex since blades undergo a wide range of angles-of-attack during every rotation. This induces numerous flow instabilities, separation and interaction between the oncoming blade and the vortex trail detached from the previous. Those are some of the main reasons for the decreased efficiency of this type of wind turbines. On the other hand, their main advantages include: structural simplicity, omnidirectional operability as well as operability in "dirty" winds.
Three-dimensional numerical simulations of fluid flow around a small-scale vertical-axis wind turbine have been completed for ten different working regimes. Transient computations of incompressible, viscous flow have been performed by finite volume method. Aerodynamic performances of the investigated rotor in idealized, uniform velocity stream and a power-law profile (corresponding to Earth's boundary layer) have also been compared. Computed values of power coefficient indicate that a performance reduction of 1-4 % can be expected in real working conditions.",
publisher = "Belgrade : Innovation Center of Faculty of Mechanical Engineering",
journal = "The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH",
title = "Effects of ground and velocity profiles on aerodynamic performances of small-scale vertical-axis wind turbines",
pages = "55",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4254"
}

Svorcan, J., Tanović, D. Lj.,& Peković, O.. (2020). Effects of ground and velocity profiles on aerodynamic performances of small-scale vertical-axis wind turbines. in The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH
Belgrade : Innovation Center of Faculty of Mechanical Engineering., 55.
https://hdl.handle.net/21.15107/rcub_machinery_4254

Svorcan J, Tanović DL, Peković O. Effects of ground and velocity profiles on aerodynamic performances of small-scale vertical-axis wind turbines. in The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH. 2020;:55.
https://hdl.handle.net/21.15107/rcub_machinery_4254 .

Svorcan, Jelena, Tanović, Dragoljub Lj., Peković, Ognjen, "Effects of ground and velocity profiles on aerodynamic performances of small-scale vertical-axis wind turbines" in The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH (2020):55,
https://hdl.handle.net/21.15107/rcub_machinery_4254 .

TY  - CONF
AU  - Svorcan, Jelena
AU  - Baltić, Marija
AU  - Peković, Ognjen
AU  - Simonović, Aleksandar
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4211
AB  - Numerical investigations of several different typical cases of a low-speed light weapon delivery from a representative aircraft wing are performed in ANSYS FLUENT using unstructured overset meshing with dynamic/moving meshes. These simplified three-dimensional, symmetric, 3DOF (degrees-of-freedom) simulations are conducted in order to check the expected missile trajectory after gravity (free fall) separation and assure both aircraft and weapon safety since carrier and missile interference can be rather complex and dangerous in certain (unfavorable) operating conditions. The transient behavior of incompressible flow is computed by Unsteady Reynolds Averaged Navier-Stokes (URANS) equations closed by a two-equation k−ω SST turbulence model, while the rigid body motion is governed by the aerodynamic (pressure and shear) and gravitational forces acting on the weapon. Carrier velocity and flying height, missile mass and inertial properties and CG location as well as its initial position on the aircraft are just some of the factors that can be varied to obtain different flight conditions and resulting flight paths. Here, special attention was given to two input parameters: angle-of-attack and CG longitudinal coordinate. For validation, the obtained numerical results, that include horizontal, vertical and angular displacements of the ejected object, are compared to available experimental data obtained in real flights, wind tunnels etc. as well as values estimated by a simpler numerical model. The satisfactory correspondence between different sets of results proves the applicability of the tested method, i.e. computational approach.
PB  - Belgrade :  Military Technical Institute - VTI
C3  - 9th International scientific conference on defensive technologies OTEH 2020
T1  - Computational analyses of gravitational (free fall) store separation in different flight conditions
EP  - 34
SP  - 29
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4211
ER  - 

@conference{
author = "Svorcan, Jelena and Baltić, Marija and Peković, Ognjen and Simonović, Aleksandar",
year = "2020",
abstract = "Numerical investigations of several different typical cases of a low-speed light weapon delivery from a representative aircraft wing are performed in ANSYS FLUENT using unstructured overset meshing with dynamic/moving meshes. These simplified three-dimensional, symmetric, 3DOF (degrees-of-freedom) simulations are conducted in order to check the expected missile trajectory after gravity (free fall) separation and assure both aircraft and weapon safety since carrier and missile interference can be rather complex and dangerous in certain (unfavorable) operating conditions. The transient behavior of incompressible flow is computed by Unsteady Reynolds Averaged Navier-Stokes (URANS) equations closed by a two-equation k−ω SST turbulence model, while the rigid body motion is governed by the aerodynamic (pressure and shear) and gravitational forces acting on the weapon. Carrier velocity and flying height, missile mass and inertial properties and CG location as well as its initial position on the aircraft are just some of the factors that can be varied to obtain different flight conditions and resulting flight paths. Here, special attention was given to two input parameters: angle-of-attack and CG longitudinal coordinate. For validation, the obtained numerical results, that include horizontal, vertical and angular displacements of the ejected object, are compared to available experimental data obtained in real flights, wind tunnels etc. as well as values estimated by a simpler numerical model. The satisfactory correspondence between different sets of results proves the applicability of the tested method, i.e. computational approach.",
publisher = "Belgrade :  Military Technical Institute - VTI",
journal = "9th International scientific conference on defensive technologies OTEH 2020",
title = "Computational analyses of gravitational (free fall) store separation in different flight conditions",
pages = "34-29",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4211"
}

Svorcan, J., Baltić, M., Peković, O.,& Simonović, A.. (2020). Computational analyses of gravitational (free fall) store separation in different flight conditions. in 9th International scientific conference on defensive technologies OTEH 2020
Belgrade :  Military Technical Institute - VTI., 29-34.
https://hdl.handle.net/21.15107/rcub_machinery_4211

Svorcan J, Baltić M, Peković O, Simonović A. Computational analyses of gravitational (free fall) store separation in different flight conditions. in 9th International scientific conference on defensive technologies OTEH 2020. 2020;:29-34.
https://hdl.handle.net/21.15107/rcub_machinery_4211 .

Svorcan, Jelena, Baltić, Marija, Peković, Ognjen, Simonović, Aleksandar, "Computational analyses of gravitational (free fall) store separation in different flight conditions" in 9th International scientific conference on defensive technologies OTEH 2020 (2020):29-34,
https://hdl.handle.net/21.15107/rcub_machinery_4211 .

TY  - CONF
AU  - Peković, Ognjen
AU  - Svorcan, Jelena
AU  - Simonović, Aleksandar
AU  - Ivanov, Toni
AU  - Tanović, Dragoljub Lj.
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4266
AB  - Neki od osnovnih problema savremenog društva su klimatske promene, globalno zagrevanje, zagađenje i sl. Većom eksploatacijom obnovljivih izvora energije, a naročito energije
vetra, moguće je donekle smanjiti negativne efekte povećanja energetskih potreba. Jedan od mogućih načina boljeg iskorišćenja resursa vetra je postavljanje povećanog broja vetroturbina u urbane sredine. Međutim, kako one tada funkcionišu u nepovoljnim radnim uslovima (neravnomernoj i promenljivoj brzini, Zemljinom graničnom sloju, vrtložnom tragu okolnih objekata), potrebno je paralelno razvijati elemente kojima je moguće lokalno povećati brzinu neporemećenog, nadolazećeg strujnog polja. U tu svrhu, moguće je instalirati koncentrator vazduha, posebno projektovan za vetroturbine sa vertikalnom osom obrtanja. Predloženi koncentrator je koničnog oblika. Njegove geometrijske karakteristike moguće je dodatno optimizovati u zavisnosti od same vetroturbine ali i uslova na lokaciji na koju se postavlja. Odlikuju ga jednostavnost i operabilnost u svim pravcima duvanja vetra. Rad opisuje izvršene ravanske numeričke simulacije strujnog polja oko koncentratora vazduha sa ciljem definisanja njegovog optimalnog oblika, a u zavisnosti od zadatog prečnika i visine vetroturbine kao i nominalne vrednosti neporemećene brzine vetra. Proračuni su izvršeni metodom konačnih zapremina uz
pretpostavke nestišljivog, viskoznog fluida. Rezultati su dati u obliku raspodela brzine kao i brojnih vizuelizacija strujnog polja. Optimizacija nekoliko osnovnih geometrijskih karakteristika koncentratora izvršena je na osnovu proračunatih aerodinamičkih performansi kao i ravnomernosti rezultujućih profila brzine.
PB  - Beograd : Savez energetičara
C3  - Energija, ekonomija, ekologija - Monografija XXXV Međunarodnog savetovanja ENERGETIKA 2020 - Zbornik radova
T1  - Optimizacija koncentratora vazduha vetroturbina sa vertikalnom osom obrtanja
EP  - 249
SP  - 244
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4266
ER  - 

@conference{
author = "Peković, Ognjen and Svorcan, Jelena and Simonović, Aleksandar and Ivanov, Toni and Tanović, Dragoljub Lj.",
year = "2020",
abstract = "Neki od osnovnih problema savremenog društva su klimatske promene, globalno zagrevanje, zagađenje i sl. Većom eksploatacijom obnovljivih izvora energije, a naročito energije
vetra, moguće je donekle smanjiti negativne efekte povećanja energetskih potreba. Jedan od mogućih načina boljeg iskorišćenja resursa vetra je postavljanje povećanog broja vetroturbina u urbane sredine. Međutim, kako one tada funkcionišu u nepovoljnim radnim uslovima (neravnomernoj i promenljivoj brzini, Zemljinom graničnom sloju, vrtložnom tragu okolnih objekata), potrebno je paralelno razvijati elemente kojima je moguće lokalno povećati brzinu neporemećenog, nadolazećeg strujnog polja. U tu svrhu, moguće je instalirati koncentrator vazduha, posebno projektovan za vetroturbine sa vertikalnom osom obrtanja. Predloženi koncentrator je koničnog oblika. Njegove geometrijske karakteristike moguće je dodatno optimizovati u zavisnosti od same vetroturbine ali i uslova na lokaciji na koju se postavlja. Odlikuju ga jednostavnost i operabilnost u svim pravcima duvanja vetra. Rad opisuje izvršene ravanske numeričke simulacije strujnog polja oko koncentratora vazduha sa ciljem definisanja njegovog optimalnog oblika, a u zavisnosti od zadatog prečnika i visine vetroturbine kao i nominalne vrednosti neporemećene brzine vetra. Proračuni su izvršeni metodom konačnih zapremina uz
pretpostavke nestišljivog, viskoznog fluida. Rezultati su dati u obliku raspodela brzine kao i brojnih vizuelizacija strujnog polja. Optimizacija nekoliko osnovnih geometrijskih karakteristika koncentratora izvršena je na osnovu proračunatih aerodinamičkih performansi kao i ravnomernosti rezultujućih profila brzine.",
publisher = "Beograd : Savez energetičara",
journal = "Energija, ekonomija, ekologija - Monografija XXXV Međunarodnog savetovanja ENERGETIKA 2020 - Zbornik radova",
title = "Optimizacija koncentratora vazduha vetroturbina sa vertikalnom osom obrtanja",
pages = "249-244",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4266"
}

Peković, O., Svorcan, J., Simonović, A., Ivanov, T.,& Tanović, D. Lj.. (2020). Optimizacija koncentratora vazduha vetroturbina sa vertikalnom osom obrtanja. in Energija, ekonomija, ekologija - Monografija XXXV Međunarodnog savetovanja ENERGETIKA 2020 - Zbornik radova
Beograd : Savez energetičara., 244-249.
https://hdl.handle.net/21.15107/rcub_machinery_4266

Peković O, Svorcan J, Simonović A, Ivanov T, Tanović DL. Optimizacija koncentratora vazduha vetroturbina sa vertikalnom osom obrtanja. in Energija, ekonomija, ekologija - Monografija XXXV Međunarodnog savetovanja ENERGETIKA 2020 - Zbornik radova. 2020;:244-249.
https://hdl.handle.net/21.15107/rcub_machinery_4266 .

Peković, Ognjen, Svorcan, Jelena, Simonović, Aleksandar, Ivanov, Toni, Tanović, Dragoljub Lj., "Optimizacija koncentratora vazduha vetroturbina sa vertikalnom osom obrtanja" in Energija, ekonomija, ekologija - Monografija XXXV Međunarodnog savetovanja ENERGETIKA 2020 - Zbornik radova (2020):244-249,
https://hdl.handle.net/21.15107/rcub_machinery_4266 .

TY  - CONF
AU  - Svorcan, Jelena
AU  - Peković, Ognjen
AU  - Ivanov, Toni
AU  - Vorkapić, Miloš
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4212
AB  - With wind energy extraction constantly increasing, the interest in small-scale urban wind turbines
is also expanding. Given that these machines often work in adverse operating conditions
(Earth’s boundary layer, vortex trails of surrounding objects, small and changeable wind speeds),
additional elements that locally augment wind velocity and facilitate turbine start may be installed.
This paper investigates possible benefits of adding an optimized flow concentrator to a vertical-axis
wind turbine (VAWT) rotor. Three-dimensional, unsteady, turbulent, incompressible flow simulations
of both isolated rotor consisting of three straight blades and a rotor with flow concentrator have been performed in ANSYS FLUENT by finite volume method for several different operational regimes. This type of flow simulations is challenging since flow angles are high, numerous flow phenomena and instabilities are present and the interaction between the blades and detached vortices can be significant. The rotational motion of the blades is solved by the unsteady Sliding Mesh (SM) approach. Flow field is modeled by Unsteady Reynolds Averaged Navier-Stokes (URANS) equations with k-ω SST turbulence model used for closure. Both quantitative and qualitative examinations of the obtained numerical results are presented. In particular, the two computed power coefficient curves are compared and the advantages of installing a flow concentrator are accentuated.
PB  - Beograd : SMEITS
C3  - 8th International Conference on Renewable Electrical Power Sources
T1  - Numerical evaluation of aerodynamic performances of vertical-axis wind turbine rotor with flow concentrator
EP  - 141
SP  - 135
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4212
ER  - 

@conference{
author = "Svorcan, Jelena and Peković, Ognjen and Ivanov, Toni and Vorkapić, Miloš",
year = "2020",
abstract = "With wind energy extraction constantly increasing, the interest in small-scale urban wind turbines
is also expanding. Given that these machines often work in adverse operating conditions
(Earth’s boundary layer, vortex trails of surrounding objects, small and changeable wind speeds),
additional elements that locally augment wind velocity and facilitate turbine start may be installed.
This paper investigates possible benefits of adding an optimized flow concentrator to a vertical-axis
wind turbine (VAWT) rotor. Three-dimensional, unsteady, turbulent, incompressible flow simulations
of both isolated rotor consisting of three straight blades and a rotor with flow concentrator have been performed in ANSYS FLUENT by finite volume method for several different operational regimes. This type of flow simulations is challenging since flow angles are high, numerous flow phenomena and instabilities are present and the interaction between the blades and detached vortices can be significant. The rotational motion of the blades is solved by the unsteady Sliding Mesh (SM) approach. Flow field is modeled by Unsteady Reynolds Averaged Navier-Stokes (URANS) equations with k-ω SST turbulence model used for closure. Both quantitative and qualitative examinations of the obtained numerical results are presented. In particular, the two computed power coefficient curves are compared and the advantages of installing a flow concentrator are accentuated.",
publisher = "Beograd : SMEITS",
journal = "8th International Conference on Renewable Electrical Power Sources",
title = "Numerical evaluation of aerodynamic performances of vertical-axis wind turbine rotor with flow concentrator",
pages = "141-135",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4212"
}

Svorcan, J., Peković, O., Ivanov, T.,& Vorkapić, M.. (2020). Numerical evaluation of aerodynamic performances of vertical-axis wind turbine rotor with flow concentrator. in 8th International Conference on Renewable Electrical Power Sources
Beograd : SMEITS., 135-141.
https://hdl.handle.net/21.15107/rcub_machinery_4212

Svorcan J, Peković O, Ivanov T, Vorkapić M. Numerical evaluation of aerodynamic performances of vertical-axis wind turbine rotor with flow concentrator. in 8th International Conference on Renewable Electrical Power Sources. 2020;:135-141.
https://hdl.handle.net/21.15107/rcub_machinery_4212 .

Svorcan, Jelena, Peković, Ognjen, Ivanov, Toni, Vorkapić, Miloš, "Numerical evaluation of aerodynamic performances of vertical-axis wind turbine rotor with flow concentrator" in 8th International Conference on Renewable Electrical Power Sources (2020):135-141,
https://hdl.handle.net/21.15107/rcub_machinery_4212 .

TY  - JOUR
AU  - Monticeli, Francisco Maciel
AU  - Daou, David
AU  - Peković, Ognjen
AU  - Simonović, Aleksandar
AU  - Cornelis Voorwald, Herman Jacobus
AU  - Hilario Cioffi, Maria Odila
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3347
AB  - The aim of this study was to carry out simulations and perform experimental quasi-static delamination tests in modes I and II to characterize the mechanical behavior at a hybrid interface. For that purpose, contact angle, infrared spectroscopy, and energy balance model results were obtained to characterize the physical interfacial energy behavior. The simulations and experimental tests presented similar values and trends, indicating that this is a viable method for predicting the critical fracture toughness of hybrid laminated composites. The low interfacial energy of the stitching (PS) and the epoxy matrix showed a decrease in the experimental strain energy release. The hybrid interface (carbon/glass/epoxy) showed an improvement in fracture toughness, which was physically elucidated through the synergy of high CF/epoxy interfacial energy strain combined with the toughness interaction via organosilane in GF/epoxy interface. In addition, the directional change in the microcracks generated between the two interfaces (rough fracture) requires an increase in energy to propagate the delamination as a result of the synergy between the CF and GF stiffness, also confirmed by the physical-based model.
PB  - Elsevier Sci Ltd, Oxford
T2  - Composites Communications
T1  - FEA simulation and experimental validation of mode I and II delamination at the carbon/glass/epoxy hybrid interface: Physical-based interpretation
VL  - 22
DO  - 10.1016/j.coco.2020.100532
ER  - 

@article{
author = "Monticeli, Francisco Maciel and Daou, David and Peković, Ognjen and Simonović, Aleksandar and Cornelis Voorwald, Herman Jacobus and Hilario Cioffi, Maria Odila",
year = "2020",
abstract = "The aim of this study was to carry out simulations and perform experimental quasi-static delamination tests in modes I and II to characterize the mechanical behavior at a hybrid interface. For that purpose, contact angle, infrared spectroscopy, and energy balance model results were obtained to characterize the physical interfacial energy behavior. The simulations and experimental tests presented similar values and trends, indicating that this is a viable method for predicting the critical fracture toughness of hybrid laminated composites. The low interfacial energy of the stitching (PS) and the epoxy matrix showed a decrease in the experimental strain energy release. The hybrid interface (carbon/glass/epoxy) showed an improvement in fracture toughness, which was physically elucidated through the synergy of high CF/epoxy interfacial energy strain combined with the toughness interaction via organosilane in GF/epoxy interface. In addition, the directional change in the microcracks generated between the two interfaces (rough fracture) requires an increase in energy to propagate the delamination as a result of the synergy between the CF and GF stiffness, also confirmed by the physical-based model.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Composites Communications",
title = "FEA simulation and experimental validation of mode I and II delamination at the carbon/glass/epoxy hybrid interface: Physical-based interpretation",
volume = "22",
doi = "10.1016/j.coco.2020.100532"
}

Monticeli, F. M., Daou, D., Peković, O., Simonović, A., Cornelis Voorwald, H. J.,& Hilario Cioffi, M. O.. (2020). FEA simulation and experimental validation of mode I and II delamination at the carbon/glass/epoxy hybrid interface: Physical-based interpretation. in Composites Communications
Elsevier Sci Ltd, Oxford., 22.
https://doi.org/10.1016/j.coco.2020.100532

Monticeli FM, Daou D, Peković O, Simonović A, Cornelis Voorwald HJ, Hilario Cioffi MO. FEA simulation and experimental validation of mode I and II delamination at the carbon/glass/epoxy hybrid interface: Physical-based interpretation. in Composites Communications. 2020;22.
doi:10.1016/j.coco.2020.100532 .

Monticeli, Francisco Maciel, Daou, David, Peković, Ognjen, Simonović, Aleksandar, Cornelis Voorwald, Herman Jacobus, Hilario Cioffi, Maria Odila, "FEA simulation and experimental validation of mode I and II delamination at the carbon/glass/epoxy hybrid interface: Physical-based interpretation" in Composites Communications, 22 (2020),
https://doi.org/10.1016/j.coco.2020.100532 . .

TY  - CONF
AU  - Svorcan, Jelena
AU  - Baltić, Marija
AU  - Ivanov, Toni
AU  - Peković, Ognjen
AU  - Milić, Milica
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4298
AB  - Three-dimensional, unsteady, turbulent, incompressible flow simulations of isolated vertical-axis
wind turbine (VAWT) high-solidity rotor consisting of three straight blades at seven different
operational regimes have been performed in ANSYS FLUENT by finite volume method. Aerodynamic analysis of this type of wind turbine rotors is interesting and extremely complex because the blades pass through a wide range of angles-of-attack during one revolution, and many flow instabilities as well as flow separation occur. Furthermore, the simulation of high-solidity rotors is even more difficult, due to the significant interference between the blades, or more precisely, between the wake of the advancing blade and the retracting blade. The rotational motion of the blades is solved by the unsteady Sliding Mesh (SM) approach. Flow field is modeled by Unsteady Reynolds Averaged Navier-Stokes (URANS) equations with k-ω SST turbulence model and hybrid Scale-Adaptive Simulation (SAS) used for closure. Quantitative and qualitative examinations of the obtained numerical results are done by comparison to the available wind tunnel data. In particular, aerodynamic loads acting on a blade per revolution as well as power coefficient curves are investigated in detail and comparisons between the two turbulence models are made. Final distinguishing between the simpler and more complex approach to turbulence modeling is made by visualizations of turbulent flow structures separating from the blades throughout a cycle at both non-optimal (starting) and optimal working regimes.
PB  - Belgrade : Serbian Society of Mechanics
C3  - Proceedings / The 7th International Congress of Serbian Society of Mechanics Sremski Karlovci, June 24-26, 2019
T1  - Numerical evaluation of aerodynamic loads and performances of vertical-axis wind turbine rotor
SP  - M3d
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4298
ER  - 

@conference{
author = "Svorcan, Jelena and Baltić, Marija and Ivanov, Toni and Peković, Ognjen and Milić, Milica",
year = "2019",
abstract = "Three-dimensional, unsteady, turbulent, incompressible flow simulations of isolated vertical-axis
wind turbine (VAWT) high-solidity rotor consisting of three straight blades at seven different
operational regimes have been performed in ANSYS FLUENT by finite volume method. Aerodynamic analysis of this type of wind turbine rotors is interesting and extremely complex because the blades pass through a wide range of angles-of-attack during one revolution, and many flow instabilities as well as flow separation occur. Furthermore, the simulation of high-solidity rotors is even more difficult, due to the significant interference between the blades, or more precisely, between the wake of the advancing blade and the retracting blade. The rotational motion of the blades is solved by the unsteady Sliding Mesh (SM) approach. Flow field is modeled by Unsteady Reynolds Averaged Navier-Stokes (URANS) equations with k-ω SST turbulence model and hybrid Scale-Adaptive Simulation (SAS) used for closure. Quantitative and qualitative examinations of the obtained numerical results are done by comparison to the available wind tunnel data. In particular, aerodynamic loads acting on a blade per revolution as well as power coefficient curves are investigated in detail and comparisons between the two turbulence models are made. Final distinguishing between the simpler and more complex approach to turbulence modeling is made by visualizations of turbulent flow structures separating from the blades throughout a cycle at both non-optimal (starting) and optimal working regimes.",
publisher = "Belgrade : Serbian Society of Mechanics",
journal = "Proceedings / The 7th International Congress of Serbian Society of Mechanics Sremski Karlovci, June 24-26, 2019",
title = "Numerical evaluation of aerodynamic loads and performances of vertical-axis wind turbine rotor",
pages = "M3d",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4298"
}

Svorcan, J., Baltić, M., Ivanov, T., Peković, O.,& Milić, M.. (2019). Numerical evaluation of aerodynamic loads and performances of vertical-axis wind turbine rotor. in Proceedings / The 7th International Congress of Serbian Society of Mechanics Sremski Karlovci, June 24-26, 2019
Belgrade : Serbian Society of Mechanics., M3d.
https://hdl.handle.net/21.15107/rcub_machinery_4298

Svorcan J, Baltić M, Ivanov T, Peković O, Milić M. Numerical evaluation of aerodynamic loads and performances of vertical-axis wind turbine rotor. in Proceedings / The 7th International Congress of Serbian Society of Mechanics Sremski Karlovci, June 24-26, 2019. 2019;:M3d.
https://hdl.handle.net/21.15107/rcub_machinery_4298 .

Svorcan, Jelena, Baltić, Marija, Ivanov, Toni, Peković, Ognjen, Milić, Milica, "Numerical evaluation of aerodynamic loads and performances of vertical-axis wind turbine rotor" in Proceedings / The 7th International Congress of Serbian Society of Mechanics Sremski Karlovci, June 24-26, 2019 (2019):M3d,
https://hdl.handle.net/21.15107/rcub_machinery_4298 .

TY  - CONF
AU  - Svorcan, Jelena
AU  - Trivković, Zorana
AU  - Baltić, Marija
AU  - Peković, Ognjen
AU  - Ivanov, Toni
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4300
AB  - The paper presents a possible approach to a multi-objective optimization of a small-scale vertical-axis wind turbine (VAWT) blade. The starting geometry is simple − the blade is rectangular with a symmetric airfoil NACA 0018. According to its dimensions, the blade corresponds to a VAWT of approximate power of 600 W (applicable to small consumers). Blade structure is a laminate determined by 4 parameters: 2 ply numbers and their orientations. Two-criterion constrained optimizations are performed with respect to blade mass, maximum blade tip deflection, natural frequencies and failure index. Optimization is performed by one of the heuristic, evolutionary algorithms − particle swarm optimization (PSO). Some comments, gained experiences while dealing with a real engineering problem and results concerning possible wind turbine blade structural designs are presented and discussed.
PB  - GLOBAL Society for Research and Development
C3  - Proceedings of GSRD International Conference
T1  - Multi-objective structural optimization of laminate vertical-axis wind turbine blades
EP  - 45
SP  - 42
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4300
ER  - 

@conference{
author = "Svorcan, Jelena and Trivković, Zorana and Baltić, Marija and Peković, Ognjen and Ivanov, Toni",
year = "2019",
abstract = "The paper presents a possible approach to a multi-objective optimization of a small-scale vertical-axis wind turbine (VAWT) blade. The starting geometry is simple − the blade is rectangular with a symmetric airfoil NACA 0018. According to its dimensions, the blade corresponds to a VAWT of approximate power of 600 W (applicable to small consumers). Blade structure is a laminate determined by 4 parameters: 2 ply numbers and their orientations. Two-criterion constrained optimizations are performed with respect to blade mass, maximum blade tip deflection, natural frequencies and failure index. Optimization is performed by one of the heuristic, evolutionary algorithms − particle swarm optimization (PSO). Some comments, gained experiences while dealing with a real engineering problem and results concerning possible wind turbine blade structural designs are presented and discussed.",
publisher = "GLOBAL Society for Research and Development",
journal = "Proceedings of GSRD International Conference",
title = "Multi-objective structural optimization of laminate vertical-axis wind turbine blades",
pages = "45-42",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4300"
}

Svorcan, J., Trivković, Z., Baltić, M., Peković, O.,& Ivanov, T.. (2019). Multi-objective structural optimization of laminate vertical-axis wind turbine blades. in Proceedings of GSRD International Conference
GLOBAL Society for Research and Development., 42-45.
https://hdl.handle.net/21.15107/rcub_machinery_4300

Svorcan J, Trivković Z, Baltić M, Peković O, Ivanov T. Multi-objective structural optimization of laminate vertical-axis wind turbine blades. in Proceedings of GSRD International Conference. 2019;:42-45.
https://hdl.handle.net/21.15107/rcub_machinery_4300 .

Svorcan, Jelena, Trivković, Zorana, Baltić, Marija, Peković, Ognjen, Ivanov, Toni, "Multi-objective structural optimization of laminate vertical-axis wind turbine blades" in Proceedings of GSRD International Conference (2019):42-45,
https://hdl.handle.net/21.15107/rcub_machinery_4300 .

TY  - CONF
AU  - Baltić, Marija
AU  - Svorcan, Jelena
AU  - Peković, Ognjen
AU  - Ivanov, Toni
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4307
AB  - The paper presents the comparative analysis of the dynamic behaviour of two rectangular plates of different material, aluminium and composite. While their global geometric dimensions (length, width and thickness) are identical, their inner structures are quite different. Whereas aluminium plate can be considered isotropic, composite plate is a unidirectional carbon-epoxy laminate. Modal characteristics of the two plates were determined both numerically and experimentally and a
comparative analysis of the obtained results was performed. Responses of the plates were documented by an optical, contactless 3D digital image correlation (DIC) system that contains a set of high-speed cameras capable of recording the movement of the white-and-black stochastic pattern applied to the upper surfaces of the plates. Numerical simulations were performed by the finite element method (FEM) in the commercial software package ANSYS. The plates were excited by a modal hammer and allowed to freely oscillate. In order to determine the natural frequencies of the plates the recorded time-domain responses were post-processed, i.e. converted to frequency domain by fast Fourier transform (FFT). The first three natural modes were successfully experimentally established and compared to the corresponding numerical values. Since the
differences between the two sets of results are less than 5%, the applied experimental technique can be considered valid and suitable to a wide range of engineering problems involving vibrations.
PB  - Belgrade : Innovation Center of Faculty of Mechanical Engineering
C3  - The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH
T1  - Numerical and experimental modal analysis of aluminium and composite plates
SP  - 45
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4307
ER  - 

@conference{
author = "Baltić, Marija and Svorcan, Jelena and Peković, Ognjen and Ivanov, Toni",
year = "2019",
abstract = "The paper presents the comparative analysis of the dynamic behaviour of two rectangular plates of different material, aluminium and composite. While their global geometric dimensions (length, width and thickness) are identical, their inner structures are quite different. Whereas aluminium plate can be considered isotropic, composite plate is a unidirectional carbon-epoxy laminate. Modal characteristics of the two plates were determined both numerically and experimentally and a
comparative analysis of the obtained results was performed. Responses of the plates were documented by an optical, contactless 3D digital image correlation (DIC) system that contains a set of high-speed cameras capable of recording the movement of the white-and-black stochastic pattern applied to the upper surfaces of the plates. Numerical simulations were performed by the finite element method (FEM) in the commercial software package ANSYS. The plates were excited by a modal hammer and allowed to freely oscillate. In order to determine the natural frequencies of the plates the recorded time-domain responses were post-processed, i.e. converted to frequency domain by fast Fourier transform (FFT). The first three natural modes were successfully experimentally established and compared to the corresponding numerical values. Since the
differences between the two sets of results are less than 5%, the applied experimental technique can be considered valid and suitable to a wide range of engineering problems involving vibrations.",
publisher = "Belgrade : Innovation Center of Faculty of Mechanical Engineering",
journal = "The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH",
title = "Numerical and experimental modal analysis of aluminium and composite plates",
pages = "45",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4307"
}

Baltić, M., Svorcan, J., Peković, O.,& Ivanov, T.. (2019). Numerical and experimental modal analysis of aluminium and composite plates. in The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH
Belgrade : Innovation Center of Faculty of Mechanical Engineering., 45.
https://hdl.handle.net/21.15107/rcub_machinery_4307

Baltić M, Svorcan J, Peković O, Ivanov T. Numerical and experimental modal analysis of aluminium and composite plates. in The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH. 2019;:45.
https://hdl.handle.net/21.15107/rcub_machinery_4307 .

Baltić, Marija, Svorcan, Jelena, Peković, Ognjen, Ivanov, Toni, "Numerical and experimental modal analysis of aluminium and composite plates" in The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH (2019):45,
https://hdl.handle.net/21.15107/rcub_machinery_4307 .

TY  - JOUR
AU  - Svorcan, Jelena
AU  - Trivković, Zorana
AU  - Ivanov, Toni
AU  - Baltić, Marija
AU  - Peković, Ognjen
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3187
AB  - Vetroturbine sa vertikalnom osom obrtanja predstavljaju privlačno oruđe za iskorišćenje energije vetra, naročito pogodno za male potrošače ili nepristupačne terene. Iako su jednostavne geometrije (ovde su pretpostavljene prave lopatice konstantnog aeroprofila), njihova aerodinamička analiza može biti izrazito složena. Metode proračunske mehanike fluida iskorišćene su za procenu aerodinamičkih performansi rotora. Rad daje pregled i ocenu mogućih strategija za izvršenje višekriterijumskih optimizacija tokom projektovanja lopatice vetroturbine sa vertikalnom osom obrtanja laminatne strukture koje se odnose na njene glavne strukturne parametre: redosled ređanja i broj slojeva laminata. Brojni proračuni strukture kompozitnih lopatica vetroturbine izvedeni su metodom konačnih elemenata. Višekriterijumske ograničene optimizacije rojem čestica, evolutivnim metodom, izvršene su u odnosu na: ukupnu masu lopatice, najveće pomeranje strukture lopatice pri statičkom opterećenju, proračunate sopstvene frekvencije i kriterijum loma po lopatici. Kombinacijom različitih ulaznih i izlaznih parametara (ciljnih funkcija i ograničenja) moguće je definisati veliki broj prihvatljivih, poboljšanih rešenja.
AB  - Vertical-axis wind turbines (VAWTs) are attractive tools for wind energy extraction particularly suitable for small consumers or off-grid areas. Although their geometry is simple (here, rectangular blade of constant airfoil is assumed), aerodynamic analysis may be quite complex. Computational fluid dynamics (CFD) approach is employed for the estimation of rotor aerodynamic performances. This paper provides a review of possible multi-objective optimization strategies for the design of small-scale VAWT laminate blades in terms of its main structural parameters: ply-order and ply-number. Numerous structural analyses of the composite turbine blades were performed by finite element method (FEM). Multi-criteria constrained optimizations, by an evolutionary method - particle swarm optimization (PSO), were performed with respect to blade total mass, maximum blade tip deflection under static loading, computed natural frequencies and failure index along the blade. By combining different input and output parameters (cost functions and constraints) a large variety of feasible solutions can be achieved.
PB  - Univerzitet u Beogradu - Mašinski fakultet, Beograd
T2  - FME Transactions
T1  - Višekriterijumske ograničene optimizacije kompozitnih lopatica vetroturbina sa vertikalnom osom obrtanja bazirane na konačno-elementnoj analizi i optimizaciji brojem čestica
T1  - Multi-objective constrained optimizations of VAWT composite blades based on FEM and PSO
EP  - 893
IS  - 4
SP  - 887
VL  - 47
DO  - 10.5937/fmet1904887S
ER  - 

@article{
author = "Svorcan, Jelena and Trivković, Zorana and Ivanov, Toni and Baltić, Marija and Peković, Ognjen",
year = "2019",
abstract = "Vetroturbine sa vertikalnom osom obrtanja predstavljaju privlačno oruđe za iskorišćenje energije vetra, naročito pogodno za male potrošače ili nepristupačne terene. Iako su jednostavne geometrije (ovde su pretpostavljene prave lopatice konstantnog aeroprofila), njihova aerodinamička analiza može biti izrazito složena. Metode proračunske mehanike fluida iskorišćene su za procenu aerodinamičkih performansi rotora. Rad daje pregled i ocenu mogućih strategija za izvršenje višekriterijumskih optimizacija tokom projektovanja lopatice vetroturbine sa vertikalnom osom obrtanja laminatne strukture koje se odnose na njene glavne strukturne parametre: redosled ređanja i broj slojeva laminata. Brojni proračuni strukture kompozitnih lopatica vetroturbine izvedeni su metodom konačnih elemenata. Višekriterijumske ograničene optimizacije rojem čestica, evolutivnim metodom, izvršene su u odnosu na: ukupnu masu lopatice, najveće pomeranje strukture lopatice pri statičkom opterećenju, proračunate sopstvene frekvencije i kriterijum loma po lopatici. Kombinacijom različitih ulaznih i izlaznih parametara (ciljnih funkcija i ograničenja) moguće je definisati veliki broj prihvatljivih, poboljšanih rešenja., Vertical-axis wind turbines (VAWTs) are attractive tools for wind energy extraction particularly suitable for small consumers or off-grid areas. Although their geometry is simple (here, rectangular blade of constant airfoil is assumed), aerodynamic analysis may be quite complex. Computational fluid dynamics (CFD) approach is employed for the estimation of rotor aerodynamic performances. This paper provides a review of possible multi-objective optimization strategies for the design of small-scale VAWT laminate blades in terms of its main structural parameters: ply-order and ply-number. Numerous structural analyses of the composite turbine blades were performed by finite element method (FEM). Multi-criteria constrained optimizations, by an evolutionary method - particle swarm optimization (PSO), were performed with respect to blade total mass, maximum blade tip deflection under static loading, computed natural frequencies and failure index along the blade. By combining different input and output parameters (cost functions and constraints) a large variety of feasible solutions can be achieved.",
publisher = "Univerzitet u Beogradu - Mašinski fakultet, Beograd",
journal = "FME Transactions",
title = "Višekriterijumske ograničene optimizacije kompozitnih lopatica vetroturbina sa vertikalnom osom obrtanja bazirane na konačno-elementnoj analizi i optimizaciji brojem čestica, Multi-objective constrained optimizations of VAWT composite blades based on FEM and PSO",
pages = "893-887",
number = "4",
volume = "47",
doi = "10.5937/fmet1904887S"
}

Svorcan, J., Trivković, Z., Ivanov, T., Baltić, M.,& Peković, O.. (2019). Višekriterijumske ograničene optimizacije kompozitnih lopatica vetroturbina sa vertikalnom osom obrtanja bazirane na konačno-elementnoj analizi i optimizaciji brojem čestica. in FME Transactions
Univerzitet u Beogradu - Mašinski fakultet, Beograd., 47(4), 887-893.
https://doi.org/10.5937/fmet1904887S

Svorcan J, Trivković Z, Ivanov T, Baltić M, Peković O. Višekriterijumske ograničene optimizacije kompozitnih lopatica vetroturbina sa vertikalnom osom obrtanja bazirane na konačno-elementnoj analizi i optimizaciji brojem čestica. in FME Transactions. 2019;47(4):887-893.
doi:10.5937/fmet1904887S .

Svorcan, Jelena, Trivković, Zorana, Ivanov, Toni, Baltić, Marija, Peković, Ognjen, "Višekriterijumske ograničene optimizacije kompozitnih lopatica vetroturbina sa vertikalnom osom obrtanja bazirane na konačno-elementnoj analizi i optimizaciji brojem čestica" in FME Transactions, 47, no. 4 (2019):887-893,
https://doi.org/10.5937/fmet1904887S . .

TY  - JOUR
AU  - Baltić, Marija
AU  - Svorcan, Jelena
AU  - Perić, Bojan
AU  - Vorkapić, Miloš
AU  - Ivanov, Toni
AU  - Peković, Ognjen
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3124
AB  - In order to investigate both static and dynamic characteristics of composite plates and validate a contemporary, non-invasive experimental technique a comparative experimental and numerical analysis was performed. Three, geometrically the same but different in ply orientation, carbon-epoxy laminates were tested in both healthy and damaged conditions. Damages were inflicted in a shape of horizontal crack. Experiments and numerical simulations were performed by digital image correlation (DIC) and finite element method (FEM), respectively. Obtained time-responses of the tested structures were fast Fourier transformed (FFT) to frequency domain for a clearer understanding of natural frequencies and oscillation modes. Results are presented in tabular and graphical form. The overall correspondence of two sets of structural displacements is satisfactory. Some discrepancies might be contributed to the idealized geometry and restraint consideration. Also, due to the fast damping of higher tones, the errors in determining higher natural frequencies increase but still remain in 5 % range.
PB  - Korean Soc Mechanical Engineers, Seoul
T2  - Journal of Mechanical Science and Technology
T1  - Comparative numerical and experimental investigation of static and dynamic characteristics of composite plates
EP  - 2603
IS  - 6
SP  - 2597
VL  - 33
DO  - 10.1007/s12206-019-0507-7
ER  - 

@article{
author = "Baltić, Marija and Svorcan, Jelena and Perić, Bojan and Vorkapić, Miloš and Ivanov, Toni and Peković, Ognjen",
year = "2019",
abstract = "In order to investigate both static and dynamic characteristics of composite plates and validate a contemporary, non-invasive experimental technique a comparative experimental and numerical analysis was performed. Three, geometrically the same but different in ply orientation, carbon-epoxy laminates were tested in both healthy and damaged conditions. Damages were inflicted in a shape of horizontal crack. Experiments and numerical simulations were performed by digital image correlation (DIC) and finite element method (FEM), respectively. Obtained time-responses of the tested structures were fast Fourier transformed (FFT) to frequency domain for a clearer understanding of natural frequencies and oscillation modes. Results are presented in tabular and graphical form. The overall correspondence of two sets of structural displacements is satisfactory. Some discrepancies might be contributed to the idealized geometry and restraint consideration. Also, due to the fast damping of higher tones, the errors in determining higher natural frequencies increase but still remain in 5 % range.",
publisher = "Korean Soc Mechanical Engineers, Seoul",
journal = "Journal of Mechanical Science and Technology",
title = "Comparative numerical and experimental investigation of static and dynamic characteristics of composite plates",
pages = "2603-2597",
number = "6",
volume = "33",
doi = "10.1007/s12206-019-0507-7"
}

Baltić, M., Svorcan, J., Perić, B., Vorkapić, M., Ivanov, T.,& Peković, O.. (2019). Comparative numerical and experimental investigation of static and dynamic characteristics of composite plates. in Journal of Mechanical Science and Technology
Korean Soc Mechanical Engineers, Seoul., 33(6), 2597-2603.
https://doi.org/10.1007/s12206-019-0507-7

Baltić M, Svorcan J, Perić B, Vorkapić M, Ivanov T, Peković O. Comparative numerical and experimental investigation of static and dynamic characteristics of composite plates. in Journal of Mechanical Science and Technology. 2019;33(6):2597-2603.
doi:10.1007/s12206-019-0507-7 .

Baltić, Marija, Svorcan, Jelena, Perić, Bojan, Vorkapić, Miloš, Ivanov, Toni, Peković, Ognjen, "Comparative numerical and experimental investigation of static and dynamic characteristics of composite plates" in Journal of Mechanical Science and Technology, 33, no. 6 (2019):2597-2603,
https://doi.org/10.1007/s12206-019-0507-7 . .

TY  - CONF
AU  - Perić, Bojan
AU  - Svorcan, Jelena
AU  - Peković, Ognjen
AU  - Simonović, Aleksandar
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6230
AB  - U ovom radu numerički je ispitivana vetroturbina sa horizontalnom osom obrtanja DTU 10MW. Izvršena je
aerodinamička analiza referentnog rotora vetroturbine primenom metode elementa lopatice kao i metode
konačnih zapremina pomoću Ansys FLUENT softverskog paketa. Kombinacijom ovih metoda omogućeno je
dobijanje značajnih preliminarnih rezultata za projektovanjevetroturbina sa rotorima velikih prečnika.
PB  - Univerzitet u Beogradu-Mašinski fakultet
C3  - Zbornik radova - 41. JUPITER konferencija / Proceedings - 41nd JUPITER Conference, 2018, 7-12. Maj
T1  - NUMERIČKA ANALIZA AERODINAMIČKIH KARAKTERISTIKA ROTORA VETROTURBINE SA HORIZONTALNOM OSOM OBRTANJA
EP  - 2.30
SP  - 2.25
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6230
ER  - 

@conference{
author = "Perić, Bojan and Svorcan, Jelena and Peković, Ognjen and Simonović, Aleksandar",
year = "2018",
abstract = "U ovom radu numerički je ispitivana vetroturbina sa horizontalnom osom obrtanja DTU 10MW. Izvršena je
aerodinamička analiza referentnog rotora vetroturbine primenom metode elementa lopatice kao i metode
konačnih zapremina pomoću Ansys FLUENT softverskog paketa. Kombinacijom ovih metoda omogućeno je
dobijanje značajnih preliminarnih rezultata za projektovanjevetroturbina sa rotorima velikih prečnika.",
publisher = "Univerzitet u Beogradu-Mašinski fakultet",
journal = "Zbornik radova - 41. JUPITER konferencija / Proceedings - 41nd JUPITER Conference, 2018, 7-12. Maj",
title = "NUMERIČKA ANALIZA AERODINAMIČKIH KARAKTERISTIKA ROTORA VETROTURBINE SA HORIZONTALNOM OSOM OBRTANJA",
pages = "2.30-2.25",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6230"
}

Perić, B., Svorcan, J., Peković, O.,& Simonović, A.. (2018). NUMERIČKA ANALIZA AERODINAMIČKIH KARAKTERISTIKA ROTORA VETROTURBINE SA HORIZONTALNOM OSOM OBRTANJA. in Zbornik radova - 41. JUPITER konferencija / Proceedings - 41nd JUPITER Conference, 2018, 7-12. Maj
Univerzitet u Beogradu-Mašinski fakultet., 2.25-2.30.
https://hdl.handle.net/21.15107/rcub_machinery_6230

Perić B, Svorcan J, Peković O, Simonović A. NUMERIČKA ANALIZA AERODINAMIČKIH KARAKTERISTIKA ROTORA VETROTURBINE SA HORIZONTALNOM OSOM OBRTANJA. in Zbornik radova - 41. JUPITER konferencija / Proceedings - 41nd JUPITER Conference, 2018, 7-12. Maj. 2018;:2.25-2.30.
https://hdl.handle.net/21.15107/rcub_machinery_6230 .

Perić, Bojan, Svorcan, Jelena, Peković, Ognjen, Simonović, Aleksandar, "NUMERIČKA ANALIZA AERODINAMIČKIH KARAKTERISTIKA ROTORA VETROTURBINE SA HORIZONTALNOM OSOM OBRTANJA" in Zbornik radova - 41. JUPITER konferencija / Proceedings - 41nd JUPITER Conference, 2018, 7-12. Maj (2018):2.25-2.30,
https://hdl.handle.net/21.15107/rcub_machinery_6230 .

TY  - CONF
AU  - Perić, B.
AU  - Simonović, Aleksandar
AU  - Ivanov, Toni
AU  - Stupar, Slobodan
AU  - Vorkapić, Miloš
AU  - Peković, Ognjen
AU  - Svorcan, Jelena
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2851
AB  - Metal membranes are defined as thin steel circular plates. The metal membranes are widely used in the measurement technique and they are constantly loaded over the entire surface. In case that a membrane is loaded with uniform load over the entire surface. In case that the membrane is stiffened over the edge, then it is called a diaphragm. According to the making method membranes are divided into flat and corrugated. Corrugated membranes are used mainly in a low pressure area. Membranes are most commonly made of firm alloy austenitic steel. In this paper numerical and experimental analysis of a thin corrugated diaphragm 24 mm diameter is presented, with variable material thickness and variable corrugations geometry. Experimental tests are conducted on a corrugated stainless steel (AISI 316) diaphragm. Experimental results are compared with numerical results in ANSYS software package. A comparative analysis of the sinusoidal and toroidal diaphragms has shown that there is a higher sensitivity of the sinusoidal diaphragm, that is, if the thickness of the diaphragm increases, and their stiffness is increased. In general, for small pressure ranges from 10 mbar to 50 mbar, the sinusoidal diaphragms have a faster response.
PB  - Elsevier Science Bv, Amsterdam
C3  - Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity
T1  - Design and testing characteristics of thin stainless steel diaphragms
EP  - 2201
SP  - 2196
VL  - 13
DO  - 10.1016/j.prostr.2018.12.141
ER  - 

@conference{
author = "Perić, B. and Simonović, Aleksandar and Ivanov, Toni and Stupar, Slobodan and Vorkapić, Miloš and Peković, Ognjen and Svorcan, Jelena",
year = "2018",
abstract = "Metal membranes are defined as thin steel circular plates. The metal membranes are widely used in the measurement technique and they are constantly loaded over the entire surface. In case that a membrane is loaded with uniform load over the entire surface. In case that the membrane is stiffened over the edge, then it is called a diaphragm. According to the making method membranes are divided into flat and corrugated. Corrugated membranes are used mainly in a low pressure area. Membranes are most commonly made of firm alloy austenitic steel. In this paper numerical and experimental analysis of a thin corrugated diaphragm 24 mm diameter is presented, with variable material thickness and variable corrugations geometry. Experimental tests are conducted on a corrugated stainless steel (AISI 316) diaphragm. Experimental results are compared with numerical results in ANSYS software package. A comparative analysis of the sinusoidal and toroidal diaphragms has shown that there is a higher sensitivity of the sinusoidal diaphragm, that is, if the thickness of the diaphragm increases, and their stiffness is increased. In general, for small pressure ranges from 10 mbar to 50 mbar, the sinusoidal diaphragms have a faster response.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity",
title = "Design and testing characteristics of thin stainless steel diaphragms",
pages = "2201-2196",
volume = "13",
doi = "10.1016/j.prostr.2018.12.141"
}

Perić, B., Simonović, A., Ivanov, T., Stupar, S., Vorkapić, M., Peković, O.,& Svorcan, J.. (2018). Design and testing characteristics of thin stainless steel diaphragms. in Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity
Elsevier Science Bv, Amsterdam., 13, 2196-2201.
https://doi.org/10.1016/j.prostr.2018.12.141

Perić B, Simonović A, Ivanov T, Stupar S, Vorkapić M, Peković O, Svorcan J. Design and testing characteristics of thin stainless steel diaphragms. in Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity. 2018;13:2196-2201.
doi:10.1016/j.prostr.2018.12.141 .

Perić, B., Simonović, Aleksandar, Ivanov, Toni, Stupar, Slobodan, Vorkapić, Miloš, Peković, Ognjen, Svorcan, Jelena, "Design and testing characteristics of thin stainless steel diaphragms" in Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity, 13 (2018):2196-2201,
https://doi.org/10.1016/j.prostr.2018.12.141 . .