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  - 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  - 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  - 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  - CONF
AU  - Trivković, Zorana
AU  - Svorcan, Jelena
AU  - Baltić, Marija
AU  - Peković, Ognjen
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4308
AB  - Extracting energy from wind is a contemporary, still actively developing topic. When designing wind turbine blades, as the key components of the HAWT system, the greatest cost reductions can be made in aerodynamic (geometrical modelling, production techniques) and structural (material) sectors. The paper presents one possible approach to the integrated, both aerodynamic and structural, constrained optimization process by particle swarm optimization (PSO) algorithm.
The goal of the study is achieving maximal annual energy production (AEP) while minimizing blade mass. Inlet parameters include complete blade geometry (radius, airfoils, twist and chord distributions) as well as its structural definition (ply numbers and orientations). Aerodynamic performances of the blade were estimated by vortex method, while subsequent structural analyses (by importing aerodynamic loads) were realized by finite element method. Presented results include possible wind turbine designs as well as experiences gained while performing the study.
PB  - Get It Published Verlag e.K.
C3  - International Conference & Workshop REMOO-2017
T1  - Multi-objective integrated optimization of horizontal-axis wind turbines
SP  - 03.026
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4308
ER  - 

@conference{
author = "Trivković, Zorana and Svorcan, Jelena and Baltić, Marija and Peković, Ognjen",
year = "2017",
abstract = "Extracting energy from wind is a contemporary, still actively developing topic. When designing wind turbine blades, as the key components of the HAWT system, the greatest cost reductions can be made in aerodynamic (geometrical modelling, production techniques) and structural (material) sectors. The paper presents one possible approach to the integrated, both aerodynamic and structural, constrained optimization process by particle swarm optimization (PSO) algorithm.
The goal of the study is achieving maximal annual energy production (AEP) while minimizing blade mass. Inlet parameters include complete blade geometry (radius, airfoils, twist and chord distributions) as well as its structural definition (ply numbers and orientations). Aerodynamic performances of the blade were estimated by vortex method, while subsequent structural analyses (by importing aerodynamic loads) were realized by finite element method. Presented results include possible wind turbine designs as well as experiences gained while performing the study.",
publisher = "Get It Published Verlag e.K.",
journal = "International Conference & Workshop REMOO-2017",
title = "Multi-objective integrated optimization of horizontal-axis wind turbines",
pages = "03.026",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4308"
}

Trivković, Z., Svorcan, J., Baltić, M.,& Peković, O.. (2017). Multi-objective integrated optimization of horizontal-axis wind turbines. in International Conference & Workshop REMOO-2017
Get It Published Verlag e.K.., 03.026.
https://hdl.handle.net/21.15107/rcub_machinery_4308

Trivković Z, Svorcan J, Baltić M, Peković O. Multi-objective integrated optimization of horizontal-axis wind turbines. in International Conference & Workshop REMOO-2017. 2017;:03.026.
https://hdl.handle.net/21.15107/rcub_machinery_4308 .

Trivković, Zorana, Svorcan, Jelena, Baltić, Marija, Peković, Ognjen, "Multi-objective integrated optimization of horizontal-axis wind turbines" in International Conference & Workshop REMOO-2017 (2017):03.026,
https://hdl.handle.net/21.15107/rcub_machinery_4308 .

TY  - CONF
AU  - Svorcan, Jelena
AU  - Trivković, Zorana
AU  - Baltić, Marija
AU  - Peković, Ognjen
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4304
AB  - Although much employed, wind energy systems still present an open, contemporary topic of
many research studies. Special attention is given to precise aerodynamic modeling performed in
the beginning since overall wind turbine performances directly depend on blade aerodynamic
performances. Several models different in complexity and computational requirements are still
widely used. Most common numerical approaches include: i) momentum balance models, ii)
potential flow methods and iii) full computational fluid dynamics solutions.
Short explanation, review and comparison of the first two simpler computational categories
are given in the paper. Since potential flow methods generally produce better and more
comprehensive results (with more physical details taken into account) than momentum-based
models, they are studied with more attention. Algorithms of all considered numerical approaches
are implemented and presented. Results including global parameters such as thrust and power
coefficients as well as local distributions along the blade obtained by different models are
compared to available experimental data. Knowledge and experience gained while coding the
models are summed in the final section (Conclusions).
PB  - Belgrade : Serbian Society of Mechanics
C3  - Proceedings / 6th International Congress of Serbian Society of Mechanics Mountain Tara, Serbia, June 19-21, 2017
T1  - Comparison of different numerical approaches to computation of wind turbine blade aerodynamic performances with special attention to vortex methods
SP  - I2a
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4304
ER  - 

@conference{
author = "Svorcan, Jelena and Trivković, Zorana and Baltić, Marija and Peković, Ognjen",
year = "2017",
abstract = "Although much employed, wind energy systems still present an open, contemporary topic of
many research studies. Special attention is given to precise aerodynamic modeling performed in
the beginning since overall wind turbine performances directly depend on blade aerodynamic
performances. Several models different in complexity and computational requirements are still
widely used. Most common numerical approaches include: i) momentum balance models, ii)
potential flow methods and iii) full computational fluid dynamics solutions.
Short explanation, review and comparison of the first two simpler computational categories
are given in the paper. Since potential flow methods generally produce better and more
comprehensive results (with more physical details taken into account) than momentum-based
models, they are studied with more attention. Algorithms of all considered numerical approaches
are implemented and presented. Results including global parameters such as thrust and power
coefficients as well as local distributions along the blade obtained by different models are
compared to available experimental data. Knowledge and experience gained while coding the
models are summed in the final section (Conclusions).",
publisher = "Belgrade : Serbian Society of Mechanics",
journal = "Proceedings / 6th International Congress of Serbian Society of Mechanics Mountain Tara, Serbia, June 19-21, 2017",
title = "Comparison of different numerical approaches to computation of wind turbine blade aerodynamic performances with special attention to vortex methods",
pages = "I2a",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4304"
}

Svorcan, J., Trivković, Z., Baltić, M.,& Peković, O.. (2017). Comparison of different numerical approaches to computation of wind turbine blade aerodynamic performances with special attention to vortex methods. in Proceedings / 6th International Congress of Serbian Society of Mechanics Mountain Tara, Serbia, June 19-21, 2017
Belgrade : Serbian Society of Mechanics., I2a.
https://hdl.handle.net/21.15107/rcub_machinery_4304

Svorcan J, Trivković Z, Baltić M, Peković O. Comparison of different numerical approaches to computation of wind turbine blade aerodynamic performances with special attention to vortex methods. in Proceedings / 6th International Congress of Serbian Society of Mechanics Mountain Tara, Serbia, June 19-21, 2017. 2017;:I2a.
https://hdl.handle.net/21.15107/rcub_machinery_4304 .

Svorcan, Jelena, Trivković, Zorana, Baltić, Marija, Peković, Ognjen, "Comparison of different numerical approaches to computation of wind turbine blade aerodynamic performances with special attention to vortex methods" in Proceedings / 6th International Congress of Serbian Society of Mechanics Mountain Tara, Serbia, June 19-21, 2017 (2017):I2a,
https://hdl.handle.net/21.15107/rcub_machinery_4304 .

TY  - CONF
AU  - Svorcan, Jelena
AU  - Trivković, Zorana
AU  - Ivanov, Toni
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4305
AB  - Numerous numerical investigations of isolated horizontal-axis wind turbine rotor consisting
of three blades have been performed in ANSYS FLUENT 16.2. These flows are three-dimensional,
complex, unsteady, turbulent and vortical with several interesting flow phenomena,
such as flow separation and dynamic stalling, appearing. Flow field is modeled by Reynolds
Averaged Navier-Stokes (RANS) equations. Two different turbulent models are tried: Spalart-
Allmaras and k-ω SST. For resolving the rotational motion of the blades both Moving frame of
reference (MFR) and Sliding mesh (SM) approaches were employed. Both computational
approaches are briefly explained. Obtained numerical results are compared to available
experimental data. Presented results include fluid flow visualizations in the form of pressure and
velocity contours, sectional pressure distributions and values of power and thrust force
coefficients for a range of operational regimes. Although obtained numerical results vary in
accuracy, all presented numerical settings seem to slightly underestimate the global wind turbine
parameters (power and thrust force coefficients). Turbulence can greatly affect the wind turbine
aerodynamics and should be modeled with care.
PB  - Belgrade : Serbian Society of Mechanics
C3  - Proceedings / 6th International Congress of Serbian Society of Mechanics Mountain Tara, Serbia, June 19-21, 2017
T1  - Computational analysis of horizontal-axis wind turbine by different RANS turbulence models
SP  - M2c
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4305
ER  - 

@conference{
author = "Svorcan, Jelena and Trivković, Zorana and Ivanov, Toni",
year = "2017",
abstract = "Numerous numerical investigations of isolated horizontal-axis wind turbine rotor consisting
of three blades have been performed in ANSYS FLUENT 16.2. These flows are three-dimensional,
complex, unsteady, turbulent and vortical with several interesting flow phenomena,
such as flow separation and dynamic stalling, appearing. Flow field is modeled by Reynolds
Averaged Navier-Stokes (RANS) equations. Two different turbulent models are tried: Spalart-
Allmaras and k-ω SST. For resolving the rotational motion of the blades both Moving frame of
reference (MFR) and Sliding mesh (SM) approaches were employed. Both computational
approaches are briefly explained. Obtained numerical results are compared to available
experimental data. Presented results include fluid flow visualizations in the form of pressure and
velocity contours, sectional pressure distributions and values of power and thrust force
coefficients for a range of operational regimes. Although obtained numerical results vary in
accuracy, all presented numerical settings seem to slightly underestimate the global wind turbine
parameters (power and thrust force coefficients). Turbulence can greatly affect the wind turbine
aerodynamics and should be modeled with care.",
publisher = "Belgrade : Serbian Society of Mechanics",
journal = "Proceedings / 6th International Congress of Serbian Society of Mechanics Mountain Tara, Serbia, June 19-21, 2017",
title = "Computational analysis of horizontal-axis wind turbine by different RANS turbulence models",
pages = "M2c",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4305"
}

Svorcan, J., Trivković, Z.,& Ivanov, T.. (2017). Computational analysis of horizontal-axis wind turbine by different RANS turbulence models. in Proceedings / 6th International Congress of Serbian Society of Mechanics Mountain Tara, Serbia, June 19-21, 2017
Belgrade : Serbian Society of Mechanics., M2c.
https://hdl.handle.net/21.15107/rcub_machinery_4305

Svorcan J, Trivković Z, Ivanov T. Computational analysis of horizontal-axis wind turbine by different RANS turbulence models. in Proceedings / 6th International Congress of Serbian Society of Mechanics Mountain Tara, Serbia, June 19-21, 2017. 2017;:M2c.
https://hdl.handle.net/21.15107/rcub_machinery_4305 .

Svorcan, Jelena, Trivković, Zorana, Ivanov, Toni, "Computational analysis of horizontal-axis wind turbine by different RANS turbulence models" in Proceedings / 6th International Congress of Serbian Society of Mechanics Mountain Tara, Serbia, June 19-21, 2017 (2017):M2c,
https://hdl.handle.net/21.15107/rcub_machinery_4305 .

TY  - JOUR
AU  - Trivković, Zorana
AU  - Svorcan, Jelena
AU  - Peković, Ognjen
AU  - Ivanov, Toni
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2716
AB  - Rapid prototyping/manufacturing technology, as one of the fastest growing technologies, made its way into aeronautical industry long time ago. Beside huge cost and time savings, its main advantage lies in designers’ freedom to create new and innovative parts and systems. Today, there are many different rapid prototyping technologies available. This paper presents one possible manufacturing technology for producing accurate parts directly from computer-aided-design (CAD) models using 3-axis numerically controlled machine (in the form of subtractive milling). This process allows optimization of the design since changes can be easily incorporated into the three-dimensional (3D) model. Technology is applied on small aircraft and wind turbine blade models, and also on wind turbine blade mould, which can be used for both experimental and teaching purposes. Main advantages of the presented processes include: standardization, increased quality and accuracy, repeatability, cost and time reduction.
PB  - Springer Heidelberg
T2  - Lecture Notes in Mechanical Engineering
T1  - Manufacturing technology of aircraft and wind turbine blades models, plugs and moulds
EP  - 475
SP  - 469
DO  - 10.1007/978-3-319-56430-2_36
ER  - 

@article{
author = "Trivković, Zorana and Svorcan, Jelena and Peković, Ognjen and Ivanov, Toni",
year = "2017",
abstract = "Rapid prototyping/manufacturing technology, as one of the fastest growing technologies, made its way into aeronautical industry long time ago. Beside huge cost and time savings, its main advantage lies in designers’ freedom to create new and innovative parts and systems. Today, there are many different rapid prototyping technologies available. This paper presents one possible manufacturing technology for producing accurate parts directly from computer-aided-design (CAD) models using 3-axis numerically controlled machine (in the form of subtractive milling). This process allows optimization of the design since changes can be easily incorporated into the three-dimensional (3D) model. Technology is applied on small aircraft and wind turbine blade models, and also on wind turbine blade mould, which can be used for both experimental and teaching purposes. Main advantages of the presented processes include: standardization, increased quality and accuracy, repeatability, cost and time reduction.",
publisher = "Springer Heidelberg",
journal = "Lecture Notes in Mechanical Engineering",
title = "Manufacturing technology of aircraft and wind turbine blades models, plugs and moulds",
pages = "475-469",
doi = "10.1007/978-3-319-56430-2_36"
}

Trivković, Z., Svorcan, J., Peković, O.,& Ivanov, T.. (2017). Manufacturing technology of aircraft and wind turbine blades models, plugs and moulds. in Lecture Notes in Mechanical Engineering
Springer Heidelberg., 469-475.
https://doi.org/10.1007/978-3-319-56430-2_36

Trivković Z, Svorcan J, Peković O, Ivanov T. Manufacturing technology of aircraft and wind turbine blades models, plugs and moulds. in Lecture Notes in Mechanical Engineering. 2017;:469-475.
doi:10.1007/978-3-319-56430-2_36 .

Trivković, Zorana, Svorcan, Jelena, Peković, Ognjen, Ivanov, Toni, "Manufacturing technology of aircraft and wind turbine blades models, plugs and moulds" in Lecture Notes in Mechanical Engineering (2017):469-475,
https://doi.org/10.1007/978-3-319-56430-2_36 . .

TY  - JOUR
AU  - Trivković, Zorana
AU  - Svorcan, Jelena
AU  - Baltić, Marija
AU  - Komarov, Dragan
AU  - Fotev, Vasko
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2277
AB  - Numerička analiza izolovanog, reprezentativnog glavnog rotora helikoptera izvršena je u komercijalnom softverskom paketu ANSYS FLUENT 16.2. Generalno, strujna slika oko rotora je nestacionarna, trodimenzionalna, složena i vrtložna. Takve simulacije zahtevaju značajne proračunske resurse. Uticaj zemlje, koji poboljšava aerodinamičke performanse rotora, predstavlja dodatni izazov pri numeričkom modeliranju. U ovom radu strujno polje je izračunato Navije-Stoksovim jednačinama osrednjenim Rejnoldsovom statistikom (RANS). Rotaciono kretanje uzeto je u obzir primenom dva različita pristupa: 'Frame of reference' i 'Sliding mesh'. Izvršeno je poređenje dobijenih rezultata sa vrednostima jednostavnijih modela kao što su model zasnovan na zakonima održanja (MT) i kombinovani model segmenta lopatice (BEMT). Rezultati su predstavljenu u obliku kontura pritiska, brzine i vrtložnosti kao i vrednostima aerodinamičkih koeficijenata..
AB  - Numerical investigation of an isolated representative helicopter main rotor has been performed in ANSYS FLUENT 16.2. In general, flow field around the rotor is unsteady, three-dimensional, complex and vortical. Such a simulation requires substantial computational resources. Ground effect, which improves the aerodynamic performances of the rotor, represents an additional challenge to numerical modeling. In this study, flow field is computed by Unsteady Reynolds Averaged Navier- Stokes (URANS) equations. Both Frame of reference and Sliding mesh approaches were employed to model the rotor rotation. Obtained results are compared to results obtained by simpler, sufficiently reliable models such as Momentum Theory (MT) and Blade Element Momentum Theory (BEMT). Presented results include fluid flow visualizations in the form of pressure, velocity and vorticity contours and the values of aerodynamic coefficients.
PB  - Beograd : Vojnotehnički institut
T2  - Scientific Technical Review
T1  - Numerička analiza lopatica glavnog rotora helikoptera u blizini zemlje
T1  - Čislennyj analiz lopastej nesuščego vinta rotora vertoleta vblizi zemli / (francuski) Analyse numériques des aubes du rotor principal d'hélicoptère à proximité du sol
T1  - Computational analysis of helicopter main rotor blades in ground effect
EP  - 58
IS  - 4
SP  - 52
VL  - 66
DO  - 10.5937/STR1604052T
ER  - 

@article{
author = "Trivković, Zorana and Svorcan, Jelena and Baltić, Marija and Komarov, Dragan and Fotev, Vasko",
year = "2016",
abstract = "Numerička analiza izolovanog, reprezentativnog glavnog rotora helikoptera izvršena je u komercijalnom softverskom paketu ANSYS FLUENT 16.2. Generalno, strujna slika oko rotora je nestacionarna, trodimenzionalna, složena i vrtložna. Takve simulacije zahtevaju značajne proračunske resurse. Uticaj zemlje, koji poboljšava aerodinamičke performanse rotora, predstavlja dodatni izazov pri numeričkom modeliranju. U ovom radu strujno polje je izračunato Navije-Stoksovim jednačinama osrednjenim Rejnoldsovom statistikom (RANS). Rotaciono kretanje uzeto je u obzir primenom dva različita pristupa: 'Frame of reference' i 'Sliding mesh'. Izvršeno je poređenje dobijenih rezultata sa vrednostima jednostavnijih modela kao što su model zasnovan na zakonima održanja (MT) i kombinovani model segmenta lopatice (BEMT). Rezultati su predstavljenu u obliku kontura pritiska, brzine i vrtložnosti kao i vrednostima aerodinamičkih koeficijenata.., Numerical investigation of an isolated representative helicopter main rotor has been performed in ANSYS FLUENT 16.2. In general, flow field around the rotor is unsteady, three-dimensional, complex and vortical. Such a simulation requires substantial computational resources. Ground effect, which improves the aerodynamic performances of the rotor, represents an additional challenge to numerical modeling. In this study, flow field is computed by Unsteady Reynolds Averaged Navier- Stokes (URANS) equations. Both Frame of reference and Sliding mesh approaches were employed to model the rotor rotation. Obtained results are compared to results obtained by simpler, sufficiently reliable models such as Momentum Theory (MT) and Blade Element Momentum Theory (BEMT). Presented results include fluid flow visualizations in the form of pressure, velocity and vorticity contours and the values of aerodynamic coefficients.",
publisher = "Beograd : Vojnotehnički institut",
journal = "Scientific Technical Review",
title = "Numerička analiza lopatica glavnog rotora helikoptera u blizini zemlje, Čislennyj analiz lopastej nesuščego vinta rotora vertoleta vblizi zemli / (francuski) Analyse numériques des aubes du rotor principal d'hélicoptère à proximité du sol, Computational analysis of helicopter main rotor blades in ground effect",
pages = "58-52",
number = "4",
volume = "66",
doi = "10.5937/STR1604052T"
}

Trivković, Z., Svorcan, J., Baltić, M., Komarov, D.,& Fotev, V.. (2016). Numerička analiza lopatica glavnog rotora helikoptera u blizini zemlje. in Scientific Technical Review
Beograd : Vojnotehnički institut., 66(4), 52-58.
https://doi.org/10.5937/STR1604052T

Trivković Z, Svorcan J, Baltić M, Komarov D, Fotev V. Numerička analiza lopatica glavnog rotora helikoptera u blizini zemlje. in Scientific Technical Review. 2016;66(4):52-58.
doi:10.5937/STR1604052T .

Trivković, Zorana, Svorcan, Jelena, Baltić, Marija, Komarov, Dragan, Fotev, Vasko, "Numerička analiza lopatica glavnog rotora helikoptera u blizini zemlje" in Scientific Technical Review, 66, no. 4 (2016):52-58,
https://doi.org/10.5937/STR1604052T . .

TY  - CONF
AU  - Svorcan, Jelena
AU  - Trivković, Zorana
AU  - Baltić, Marija
AU  - Peković, Ognjen
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2353
AB  - A fast and efficient process of integrated design (both aerodynamic and structural) of a composite horizontal-axis wind turbine (HAWT) blade is presented. Multi-objective optimization using a nondeterministic particle swarm method (PSO) has been performed on a composite blade of constant radius to achieve maximal AEP (annual energy production) while keeping minimal blade mass and tip deflection. Outlet parameters include: twist and chord distributions along the blade as well as ply numbers and orientations. A combination of glass and carbon fibers is considered. In the constrained version of this multi-criteria assessment, constraint was defined according to blade failure index. Aerodynamic performances of the blade were estimated by a combined BEMT (blade element momentum theory) approach, while structural computations were performed using finite element method. Although presented results provide insight into the possible values of optimized parameters, the paper also demonstrates the difficulty of simultaneous satisfaction of this many different criteria (both cost functions and constrains).
PB  - Institute of Electrical and Electronics Engineers Inc.
C3  - 1st International Conference on Multidisciplinary Engineering Design Optimization, MEDO 2016
T1  - Rapid multidisciplinary, multi-objective optimization of composite horizontal-axis wind turbine blade
DO  - 10.1109/MEDO.2016.7746538
ER  - 

@conference{
author = "Svorcan, Jelena and Trivković, Zorana and Baltić, Marija and Peković, Ognjen",
year = "2016",
abstract = "A fast and efficient process of integrated design (both aerodynamic and structural) of a composite horizontal-axis wind turbine (HAWT) blade is presented. Multi-objective optimization using a nondeterministic particle swarm method (PSO) has been performed on a composite blade of constant radius to achieve maximal AEP (annual energy production) while keeping minimal blade mass and tip deflection. Outlet parameters include: twist and chord distributions along the blade as well as ply numbers and orientations. A combination of glass and carbon fibers is considered. In the constrained version of this multi-criteria assessment, constraint was defined according to blade failure index. Aerodynamic performances of the blade were estimated by a combined BEMT (blade element momentum theory) approach, while structural computations were performed using finite element method. Although presented results provide insight into the possible values of optimized parameters, the paper also demonstrates the difficulty of simultaneous satisfaction of this many different criteria (both cost functions and constrains).",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
journal = "1st International Conference on Multidisciplinary Engineering Design Optimization, MEDO 2016",
title = "Rapid multidisciplinary, multi-objective optimization of composite horizontal-axis wind turbine blade",
doi = "10.1109/MEDO.2016.7746538"
}

Svorcan, J., Trivković, Z., Baltić, M.,& Peković, O.. (2016). Rapid multidisciplinary, multi-objective optimization of composite horizontal-axis wind turbine blade. in 1st International Conference on Multidisciplinary Engineering Design Optimization, MEDO 2016
Institute of Electrical and Electronics Engineers Inc...
https://doi.org/10.1109/MEDO.2016.7746538

Svorcan J, Trivković Z, Baltić M, Peković O. Rapid multidisciplinary, multi-objective optimization of composite horizontal-axis wind turbine blade. in 1st International Conference on Multidisciplinary Engineering Design Optimization, MEDO 2016. 2016;.
doi:10.1109/MEDO.2016.7746538 .

Svorcan, Jelena, Trivković, Zorana, Baltić, Marija, Peković, Ognjen, "Rapid multidisciplinary, multi-objective optimization of composite horizontal-axis wind turbine blade" in 1st International Conference on Multidisciplinary Engineering Design Optimization, MEDO 2016 (2016),
https://doi.org/10.1109/MEDO.2016.7746538 . .

TY  - CONF
AU  - Ivanov, Toni
AU  - Fotev, Vasko
AU  - Petrović, Nebojša
AU  - Trivković, Zorana
AU  - Komarov, Dragan
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5436
AB  - Computational fluid dynamics (CFD) based on the finite volume method were used in order to obtain the aerodynamic characteristics of a jet nozzle. After the transient CFD results were gained the Ffowcs Williams-Hawking formulation for far-field noise modeling was used for aeroacoustic computation. A grid sensitivity was done and different turbulence models were tested. The obtained results were then compared with publicly available experimental data after which a conclusion was derived.
PB  - Military Technical Institute, Srbija
C3  - 7th International Scientific Conference od Defensive Technologies - OTEH 2016 - Proceedings
T1  - Aeroacoustic Analysis of a Jet Nozzle
EP  - 28
SP  - 24
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5436
ER  - 

@conference{
author = "Ivanov, Toni and Fotev, Vasko and Petrović, Nebojša and Trivković, Zorana and Komarov, Dragan",
year = "2016",
abstract = "Computational fluid dynamics (CFD) based on the finite volume method were used in order to obtain the aerodynamic characteristics of a jet nozzle. After the transient CFD results were gained the Ffowcs Williams-Hawking formulation for far-field noise modeling was used for aeroacoustic computation. A grid sensitivity was done and different turbulence models were tested. The obtained results were then compared with publicly available experimental data after which a conclusion was derived.",
publisher = "Military Technical Institute, Srbija",
journal = "7th International Scientific Conference od Defensive Technologies - OTEH 2016 - Proceedings",
title = "Aeroacoustic Analysis of a Jet Nozzle",
pages = "28-24",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5436"
}

Ivanov, T., Fotev, V., Petrović, N., Trivković, Z.,& Komarov, D.. (2016). Aeroacoustic Analysis of a Jet Nozzle. in 7th International Scientific Conference od Defensive Technologies - OTEH 2016 - Proceedings
Military Technical Institute, Srbija., 24-28.
https://hdl.handle.net/21.15107/rcub_machinery_5436

Ivanov T, Fotev V, Petrović N, Trivković Z, Komarov D. Aeroacoustic Analysis of a Jet Nozzle. in 7th International Scientific Conference od Defensive Technologies - OTEH 2016 - Proceedings. 2016;:24-28.
https://hdl.handle.net/21.15107/rcub_machinery_5436 .

Ivanov, Toni, Fotev, Vasko, Petrović, Nebojša, Trivković, Zorana, Komarov, Dragan, "Aeroacoustic Analysis of a Jet Nozzle" in 7th International Scientific Conference od Defensive Technologies - OTEH 2016 - Proceedings (2016):24-28,
https://hdl.handle.net/21.15107/rcub_machinery_5436 .