TY  - JOUR
AU  - Kostić, Ivan
AU  - Tanović, Dragoljub
AU  - Kostić, Olivera
AU  - Abubaker, Ahmed Ali Irhayim
AU  - Simonović, Aleksandar
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7713
AB  - Purpose: Unmanned aerial vehicles (UAV) with remote and/or automated flight and mission controls have replaced airplanes with pilots in many important roles. This study aims to deal with computational fluid dynamics (CFD) analysis and development of the aerodynamic configuration of a multi-purpose UAV for low and medium altitudes. The main aerodynamic requirement was the application of the tandem wing (TW) concept, where both wings generate a positive lift and act as primary lifting devices. Design/methodology/approach: Initial design analyses of the UAV’s aerodynamic configuration were performed using ANSYS Fluent. In previous work in Fluent, the authors established a calculation model that has been verified by experiments and, with minor adjustments, could be applied for subsonic, transonic and supersonic flow analyses. Findings: The design evolved through eight development configurations, where the latest V8 satisfied all the posted longitudinal aerodynamic requirements. Both wings generate a substantial amount of positive lift, whereas the initial stall occurs first on the front wing, generating a natural nose-down stall recovery tendency. In the cruising flight regime, this configuration has the desired range of longitudinal static stability and its centre of pressure is in close proximity to the centre of gravity. Practical implications: The intermediate development version V8 with proper longitudinal aerodynamic characteristics presents a good starting point for future development steps that will involve the optimization of lateral-directional aerodynamics. Originality/value: Using contemporary CFD tools, a novel and original TW aerodynamic configuration have evolved within eight development stages, not being based on or derived from any existing designs.
PB  - Emerald Publishing
T2  - Aircraft Engineering and Aerospace Technology
T1  - Initial development of tandem wing UAV aerodynamic configuration
EP  - 441
IS  - 3
SP  - 431
VL  - 95
DO  - 10.1108/AEAT-06-2022-0149
ER  - 

@article{
author = "Kostić, Ivan and Tanović, Dragoljub and Kostić, Olivera and Abubaker, Ahmed Ali Irhayim and Simonović, Aleksandar",
year = "2023",
abstract = "Purpose: Unmanned aerial vehicles (UAV) with remote and/or automated flight and mission controls have replaced airplanes with pilots in many important roles. This study aims to deal with computational fluid dynamics (CFD) analysis and development of the aerodynamic configuration of a multi-purpose UAV for low and medium altitudes. The main aerodynamic requirement was the application of the tandem wing (TW) concept, where both wings generate a positive lift and act as primary lifting devices. Design/methodology/approach: Initial design analyses of the UAV’s aerodynamic configuration were performed using ANSYS Fluent. In previous work in Fluent, the authors established a calculation model that has been verified by experiments and, with minor adjustments, could be applied for subsonic, transonic and supersonic flow analyses. Findings: The design evolved through eight development configurations, where the latest V8 satisfied all the posted longitudinal aerodynamic requirements. Both wings generate a substantial amount of positive lift, whereas the initial stall occurs first on the front wing, generating a natural nose-down stall recovery tendency. In the cruising flight regime, this configuration has the desired range of longitudinal static stability and its centre of pressure is in close proximity to the centre of gravity. Practical implications: The intermediate development version V8 with proper longitudinal aerodynamic characteristics presents a good starting point for future development steps that will involve the optimization of lateral-directional aerodynamics. Originality/value: Using contemporary CFD tools, a novel and original TW aerodynamic configuration have evolved within eight development stages, not being based on or derived from any existing designs.",
publisher = "Emerald Publishing",
journal = "Aircraft Engineering and Aerospace Technology",
title = "Initial development of tandem wing UAV aerodynamic configuration",
pages = "441-431",
number = "3",
volume = "95",
doi = "10.1108/AEAT-06-2022-0149"
}

Kostić, I., Tanović, D., Kostić, O., Abubaker, A. A. I.,& Simonović, A.. (2023). Initial development of tandem wing UAV aerodynamic configuration. in Aircraft Engineering and Aerospace Technology
Emerald Publishing., 95(3), 431-441.
https://doi.org/10.1108/AEAT-06-2022-0149

Kostić I, Tanović D, Kostić O, Abubaker AAI, Simonović A. Initial development of tandem wing UAV aerodynamic configuration. in Aircraft Engineering and Aerospace Technology. 2023;95(3):431-441.
doi:10.1108/AEAT-06-2022-0149 .

Kostić, Ivan, Tanović, Dragoljub, Kostić, Olivera, Abubaker, Ahmed Ali Irhayim, Simonović, Aleksandar, "Initial development of tandem wing UAV aerodynamic configuration" in Aircraft Engineering and Aerospace Technology, 95, no. 3 (2023):431-441,
https://doi.org/10.1108/AEAT-06-2022-0149 . .

TY  - CONF
AU  - Tanović, Dragoljub
AU  - Vorkapić, Miloš
AU  - Telebak, Katarina
AU  - Stojanović, Jagoš
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7749
AB  - The rising cost of fossil fuels has prompted a shift towards environmentally friendly alternative energy sources, leading to an expansion in the study of renewables. Wind turbines, specially those of the small-scale variety, have emerged as a promising solution for generating sustainable electricity, particularly in rural areas and for smaller consumers. This study focuses on the analysis of pitch angles for three-bladed horizontal axis wind turbines (HAWT) with a diameter of 1.35 m, classified as micro wind turbines. The analysis assumes incompressible and viscous flow, with shear stress transport (SST) equations closed by various turbulence models. The ANSYS program was used for conducting this analysis.
C3  - International Conference of Experimental and Numerical Investigations and New Technologies
T1  - EFFECT OF PITCH ANGLE ON WIND TURBINE  PERFORMANCES
IS  - 68
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7749
ER  - 

@conference{
author = "Tanović, Dragoljub and Vorkapić, Miloš and Telebak, Katarina and Stojanović, Jagoš",
year = "2023",
abstract = "The rising cost of fossil fuels has prompted a shift towards environmentally friendly alternative energy sources, leading to an expansion in the study of renewables. Wind turbines, specially those of the small-scale variety, have emerged as a promising solution for generating sustainable electricity, particularly in rural areas and for smaller consumers. This study focuses on the analysis of pitch angles for three-bladed horizontal axis wind turbines (HAWT) with a diameter of 1.35 m, classified as micro wind turbines. The analysis assumes incompressible and viscous flow, with shear stress transport (SST) equations closed by various turbulence models. The ANSYS program was used for conducting this analysis.",
journal = "International Conference of Experimental and Numerical Investigations and New Technologies",
title = "EFFECT OF PITCH ANGLE ON WIND TURBINE  PERFORMANCES",
number = "68",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7749"
}

Tanović, D., Vorkapić, M., Telebak, K.,& Stojanović, J.. (2023). EFFECT OF PITCH ANGLE ON WIND TURBINE  PERFORMANCES. in International Conference of Experimental and Numerical Investigations and New Technologies(68).
https://hdl.handle.net/21.15107/rcub_machinery_7749

Tanović D, Vorkapić M, Telebak K, Stojanović J. EFFECT OF PITCH ANGLE ON WIND TURBINE  PERFORMANCES. in International Conference of Experimental and Numerical Investigations and New Technologies. 2023;(68).
https://hdl.handle.net/21.15107/rcub_machinery_7749 .

Tanović, Dragoljub, Vorkapić, Miloš, Telebak, Katarina, Stojanović, Jagoš, "EFFECT OF PITCH ANGLE ON WIND TURBINE  PERFORMANCES" in International Conference of Experimental and Numerical Investigations and New Technologies, no. 68 (2023),
https://hdl.handle.net/21.15107/rcub_machinery_7749 .

TY  - CONF
AU  - Baltić, Marija
AU  - Ivanović, Milica
AU  - Tanović, Dragoljub
AU  - Vorkapić, Miloš
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7737
AB  - Biocomposite materials are a combination of two or more different biomaterials at the
macroscopic level, with competitive mechanical and insulation properties, relatively stable when
exposed to high temperatures and tailorable. In this paper, materials are with a vegetative part of
fungi (mycelium-mesh structure of hyphae) which are increasingly used to create biocomposites
with unique processing technology. The vegetative part of a fungus called mycelium, can serve as
a natural binder for products made of biocomposite and acts like a self-assembling adhesive by
digesting and adhering to the surface of specific organic matter. This paper presents the
development of mould technology to set the biocomposite structure and test its mechanical
characteristics. The primary purpose of the mould is to bring the loose natural material into a
solid preparation following the standards ASTM D7250 and ASTM D1037, which include testing
the technologically prepared and hardened sample for tensile and pressure. Development and
moulding of biocomposite are the technological processes of drying after sowing mycelium so a
variant of the mould with a perforated upper part was used to harden the samples thoroughly.
C3  - The Ninth International Congress of the Serbian Society of Mechanics, July 5-7, 2023, Vrnjačka Banja, Serbia
T1  - DEVELOPMENT AND MOULD TECHNOLOGY FOR TESTING OF BIOCOMPOSITE STRUCTURES (APPLICATION FOR THERMOINSULATED BIO PLATES)
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7737
ER  - 

@conference{
author = "Baltić, Marija and Ivanović, Milica and Tanović, Dragoljub and Vorkapić, Miloš",
year = "2023",
abstract = "Biocomposite materials are a combination of two or more different biomaterials at the
macroscopic level, with competitive mechanical and insulation properties, relatively stable when
exposed to high temperatures and tailorable. In this paper, materials are with a vegetative part of
fungi (mycelium-mesh structure of hyphae) which are increasingly used to create biocomposites
with unique processing technology. The vegetative part of a fungus called mycelium, can serve as
a natural binder for products made of biocomposite and acts like a self-assembling adhesive by
digesting and adhering to the surface of specific organic matter. This paper presents the
development of mould technology to set the biocomposite structure and test its mechanical
characteristics. The primary purpose of the mould is to bring the loose natural material into a
solid preparation following the standards ASTM D7250 and ASTM D1037, which include testing
the technologically prepared and hardened sample for tensile and pressure. Development and
moulding of biocomposite are the technological processes of drying after sowing mycelium so a
variant of the mould with a perforated upper part was used to harden the samples thoroughly.",
journal = "The Ninth International Congress of the Serbian Society of Mechanics, July 5-7, 2023, Vrnjačka Banja, Serbia",
title = "DEVELOPMENT AND MOULD TECHNOLOGY FOR TESTING OF BIOCOMPOSITE STRUCTURES (APPLICATION FOR THERMOINSULATED BIO PLATES)",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7737"
}

Baltić, M., Ivanović, M., Tanović, D.,& Vorkapić, M.. (2023). DEVELOPMENT AND MOULD TECHNOLOGY FOR TESTING OF BIOCOMPOSITE STRUCTURES (APPLICATION FOR THERMOINSULATED BIO PLATES). in The Ninth International Congress of the Serbian Society of Mechanics, July 5-7, 2023, Vrnjačka Banja, Serbia.
https://hdl.handle.net/21.15107/rcub_machinery_7737

Baltić M, Ivanović M, Tanović D, Vorkapić M. DEVELOPMENT AND MOULD TECHNOLOGY FOR TESTING OF BIOCOMPOSITE STRUCTURES (APPLICATION FOR THERMOINSULATED BIO PLATES). in The Ninth International Congress of the Serbian Society of Mechanics, July 5-7, 2023, Vrnjačka Banja, Serbia. 2023;.
https://hdl.handle.net/21.15107/rcub_machinery_7737 .

Baltić, Marija, Ivanović, Milica, Tanović, Dragoljub, Vorkapić, Miloš, "DEVELOPMENT AND MOULD TECHNOLOGY FOR TESTING OF BIOCOMPOSITE STRUCTURES (APPLICATION FOR THERMOINSULATED BIO PLATES)" in The Ninth International Congress of the Serbian Society of Mechanics, July 5-7, 2023, Vrnjačka Banja, Serbia (2023),
https://hdl.handle.net/21.15107/rcub_machinery_7737 .

TY  - CONF
AU  - Baltić, Marija
AU  - Ivanović, Milica
AU  - Tanović, Dragoljub
AU  - Vorkapić, Miloš
AU  - Mladenović, Ivana
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7272
AB  - This paper presents the static testing of the composite material’s mechanical characteristics. An overview of the standards is made by which various tests are performed, and then an analysis of the results of the parameters obtained by the conventional method-stretching and optical (DIC system-bending) of carbon epoxy composite structures is given. These results represented the basis for the preparation and further application of biocomposite materials; that is, the testing procedure will be performed identically on composites containing mycelia. The mould for pressing biomaterial connected with mycelium is made of two parts. The primary purpose of the mould is to bring the loose natural material into a solid preparation following the standards ASTM D3039 and ASTM D7078, which include testing the technologically prepared and hardened sample for bending and shearing.
PB  - Springer, Cham
C3  - Novel Techniques in Maintenance, Repair, and Overhaul. ISATECH 2022. Sustainable Aviation. Springer, Cham.
T1  - Procedures in Testing the Mechanical Characteristics of Composite Structures and the Possibility of Application to Biodegradable Materials: An Overview
DO  - 10.1007/978-3-031-42041-2_31
ER  - 

@conference{
author = "Baltić, Marija and Ivanović, Milica and Tanović, Dragoljub and Vorkapić, Miloš and Mladenović, Ivana",
year = "2023",
abstract = "This paper presents the static testing of the composite material’s mechanical characteristics. An overview of the standards is made by which various tests are performed, and then an analysis of the results of the parameters obtained by the conventional method-stretching and optical (DIC system-bending) of carbon epoxy composite structures is given. These results represented the basis for the preparation and further application of biocomposite materials; that is, the testing procedure will be performed identically on composites containing mycelia. The mould for pressing biomaterial connected with mycelium is made of two parts. The primary purpose of the mould is to bring the loose natural material into a solid preparation following the standards ASTM D3039 and ASTM D7078, which include testing the technologically prepared and hardened sample for bending and shearing.",
publisher = "Springer, Cham",
journal = "Novel Techniques in Maintenance, Repair, and Overhaul. ISATECH 2022. Sustainable Aviation. Springer, Cham.",
title = "Procedures in Testing the Mechanical Characteristics of Composite Structures and the Possibility of Application to Biodegradable Materials: An Overview",
doi = "10.1007/978-3-031-42041-2_31"
}

Baltić, M., Ivanović, M., Tanović, D., Vorkapić, M.,& Mladenović, I.. (2023). Procedures in Testing the Mechanical Characteristics of Composite Structures and the Possibility of Application to Biodegradable Materials: An Overview. in Novel Techniques in Maintenance, Repair, and Overhaul. ISATECH 2022. Sustainable Aviation. Springer, Cham.
Springer, Cham..
https://doi.org/10.1007/978-3-031-42041-2_31

Baltić M, Ivanović M, Tanović D, Vorkapić M, Mladenović I. Procedures in Testing the Mechanical Characteristics of Composite Structures and the Possibility of Application to Biodegradable Materials: An Overview. in Novel Techniques in Maintenance, Repair, and Overhaul. ISATECH 2022. Sustainable Aviation. Springer, Cham.. 2023;.
doi:10.1007/978-3-031-42041-2_31 .

Baltić, Marija, Ivanović, Milica, Tanović, Dragoljub, Vorkapić, Miloš, Mladenović, Ivana, "Procedures in Testing the Mechanical Characteristics of Composite Structures and the Possibility of Application to Biodegradable Materials: An Overview" in Novel Techniques in Maintenance, Repair, and Overhaul. ISATECH 2022. Sustainable Aviation. Springer, Cham. (2023),
https://doi.org/10.1007/978-3-031-42041-2_31 . .

TY  - CONF
AU  - Ivanović, Milica
AU  - Baltić, Marija
AU  - Tanović, Dragoljub
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7293
AB  - Heat exchangers used in the aerospace industry have inherent requirements for maximizing heat transfer efficiency, reducing weight and size, ensuring enhanced durability, and enabling customization for different aircraft types. 3D printing technology allows for the utilization of advanced materials such as high-temperature alloys and ceramics, which can withstand the extreme conditions of aerospace environments. Recent studies have highligheted the potential of 3D-printed heat exchangers in various aerospace industry, including spacecraft thermal management, electronics cooling and aircraft engine cooling.
Heat exchangers modeled on the basis of TPMS (Triple Periodic Minimal Surface) structures exhibit high surface area-to-volume ratios and interconnected pore structures, resulting in significant enhancement in heat
transfer rates. TPMS has been extensively researched in mathematics and materials science for several decades, with classical examples like the Schwartz surface, Gyroid surface and Diamond surface mainly studied for designing small-scale heat exchangers. Numerous studies have demonstrated improved heat transfer efficiency, structural stability and durability of 3D-printed heat exchangers. However, the design of TPMS structures using existing CAD systems poses challenges and further improvements are needed in modeling process.
Overall, the combination of 3D printing technology and geometry optimization represents the state-of-the-art in heat exchanger research, holding significant potential to transform existing systems and drive the development of innovative and more efficient energy systems in the aerospace industry.
C3  - International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2023
T1  - Towards innovative and more efficient solutions for heat exchangers in aerospace industry
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7293
ER  - 

@conference{
author = "Ivanović, Milica and Baltić, Marija and Tanović, Dragoljub",
year = "2023",
abstract = "Heat exchangers used in the aerospace industry have inherent requirements for maximizing heat transfer efficiency, reducing weight and size, ensuring enhanced durability, and enabling customization for different aircraft types. 3D printing technology allows for the utilization of advanced materials such as high-temperature alloys and ceramics, which can withstand the extreme conditions of aerospace environments. Recent studies have highligheted the potential of 3D-printed heat exchangers in various aerospace industry, including spacecraft thermal management, electronics cooling and aircraft engine cooling.
Heat exchangers modeled on the basis of TPMS (Triple Periodic Minimal Surface) structures exhibit high surface area-to-volume ratios and interconnected pore structures, resulting in significant enhancement in heat
transfer rates. TPMS has been extensively researched in mathematics and materials science for several decades, with classical examples like the Schwartz surface, Gyroid surface and Diamond surface mainly studied for designing small-scale heat exchangers. Numerous studies have demonstrated improved heat transfer efficiency, structural stability and durability of 3D-printed heat exchangers. However, the design of TPMS structures using existing CAD systems poses challenges and further improvements are needed in modeling process.
Overall, the combination of 3D printing technology and geometry optimization represents the state-of-the-art in heat exchanger research, holding significant potential to transform existing systems and drive the development of innovative and more efficient energy systems in the aerospace industry.",
journal = "International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2023",
title = "Towards innovative and more efficient solutions for heat exchangers in aerospace industry",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7293"
}

Ivanović, M., Baltić, M.,& Tanović, D.. (2023). Towards innovative and more efficient solutions for heat exchangers in aerospace industry. in International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2023.
https://hdl.handle.net/21.15107/rcub_machinery_7293

Ivanović M, Baltić M, Tanović D. Towards innovative and more efficient solutions for heat exchangers in aerospace industry. in International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2023. 2023;.
https://hdl.handle.net/21.15107/rcub_machinery_7293 .

Ivanović, Milica, Baltić, Marija, Tanović, Dragoljub, "Towards innovative and more efficient solutions for heat exchangers in aerospace industry" in International Conference of Experimental and Numerical Investigations and New Technologies – CNN TECH 2023 (2023),
https://hdl.handle.net/21.15107/rcub_machinery_7293 .

TY  - CONF
AU  - Tanović, Dragoljub
AU  - Svorcan, Jelena
AU  - Ivanović, Milica
AU  - Baltić, Marija
AU  - Vorkapić, Miloš
AU  - Telebak, Katarina
AU  - Stojanović, Jagoš
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7747
AB  - The wind speed is one of the major parameter influencing the design of the wind turbine, which varies widely over the different part of the country and globe. So, significant research is going on for the design of wind turbine for low, medium and high wind speed. Currently, many researchers have started designing small-scale horizontal axis wind turbines (HAWT) in world, to adapt their use to households. The advantage is reflected in the simple and affordable construction, uninterrupted operation and satisfactory power that wind turbines create. An airfoil is defined as the cross section of a body that is placed in an airstream in order to produce a useful aerodynamic force in the most efficient manner possible. The cross sections of wings, propeller blades, windmill blades, compressor and turbine blades in a jet engine, and hydrofoils are example of airfoils. A computational study has been conducted on various airfoils to simulate flows at different Reynolds numbers (Re) and wind speed to provide understanding and guidance for other low Reynolds-number designs. The numerical computational method used in this study is a boundary element method (BEM) which is implemented in software Qblade. It is an alternative deterministic method which incorporates a mesh that is only located on the boundaries of the domain and hence are attractive for free surface problems. The airfoils investigated in this study include NACA 4412, NACA 63-415 and S809. Performances such as power, power coefficient and tip speed ratio were compared.
PB  - Innovation Center of Faculty of Mechanical Engineering
C3  - International Conference of Experimental and Numerical Investigations and New Technologies
T1  - THE INFLUENCE OF THE REYNOLDS NUMBER ON THE  AIRFOILS
SP  - 63
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7747
ER  - 

@conference{
author = "Tanović, Dragoljub and Svorcan, Jelena and Ivanović, Milica and Baltić, Marija and Vorkapić, Miloš and Telebak, Katarina and Stojanović, Jagoš",
year = "2022",
abstract = "The wind speed is one of the major parameter influencing the design of the wind turbine, which varies widely over the different part of the country and globe. So, significant research is going on for the design of wind turbine for low, medium and high wind speed. Currently, many researchers have started designing small-scale horizontal axis wind turbines (HAWT) in world, to adapt their use to households. The advantage is reflected in the simple and affordable construction, uninterrupted operation and satisfactory power that wind turbines create. An airfoil is defined as the cross section of a body that is placed in an airstream in order to produce a useful aerodynamic force in the most efficient manner possible. The cross sections of wings, propeller blades, windmill blades, compressor and turbine blades in a jet engine, and hydrofoils are example of airfoils. A computational study has been conducted on various airfoils to simulate flows at different Reynolds numbers (Re) and wind speed to provide understanding and guidance for other low Reynolds-number designs. The numerical computational method used in this study is a boundary element method (BEM) which is implemented in software Qblade. It is an alternative deterministic method which incorporates a mesh that is only located on the boundaries of the domain and hence are attractive for free surface problems. The airfoils investigated in this study include NACA 4412, NACA 63-415 and S809. Performances such as power, power coefficient and tip speed ratio were compared.",
publisher = "Innovation Center of Faculty of Mechanical Engineering",
journal = "International Conference of Experimental and Numerical Investigations and New Technologies",
title = "THE INFLUENCE OF THE REYNOLDS NUMBER ON THE  AIRFOILS",
pages = "63",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7747"
}

Tanović, D., Svorcan, J., Ivanović, M., Baltić, M., Vorkapić, M., Telebak, K.,& Stojanović, J.. (2022). THE INFLUENCE OF THE REYNOLDS NUMBER ON THE  AIRFOILS. in International Conference of Experimental and Numerical Investigations and New Technologies
Innovation Center of Faculty of Mechanical Engineering., 63.
https://hdl.handle.net/21.15107/rcub_machinery_7747

Tanović D, Svorcan J, Ivanović M, Baltić M, Vorkapić M, Telebak K, Stojanović J. THE INFLUENCE OF THE REYNOLDS NUMBER ON THE  AIRFOILS. in International Conference of Experimental and Numerical Investigations and New Technologies. 2022;:63.
https://hdl.handle.net/21.15107/rcub_machinery_7747 .

Tanović, Dragoljub, Svorcan, Jelena, Ivanović, Milica, Baltić, Marija, Vorkapić, Miloš, Telebak, Katarina, Stojanović, Jagoš, "THE INFLUENCE OF THE REYNOLDS NUMBER ON THE  AIRFOILS" in International Conference of Experimental and Numerical Investigations and New Technologies (2022):63,
https://hdl.handle.net/21.15107/rcub_machinery_7747 .

TY  - CONF
AU  - Svorcan, Jelena
AU  - Tanović, Dragoljub
AU  - Kovačević, Aleksandar
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4217
AB  - The growing climate change issues and the ongoing energy crisis stipulate
further exploitation of renewable energy sources and the development of systems
capable to efficiently generate clean energy. Among the most promising are wind
turbines, that come in different shapes and sizes. Small-scale wind turbines are
economic and particularly suitable for small consumers and rural areas. They are not
too common, and further research into their performance is necessary. This paper
focuses on the design and aerodynamic performance of a small horizontal-axis wind
turbine. Its rotor geometry is described while its basic aerodynamic coefficients, power
and thrust coefficients, are computed by finite volume method in ANSYS Fluent. Flow
is assumed as incompressible and viscous, while Reynolds-averaged Navier-Stokes
(RANS) equations are closed by different turbulence models. Wind turbine
aerodynamic performance is estimated, and different flow visualizations are provided,
particularly focusing on the wind turbine wake.
PB  - University of East Sarajevo, Faculty of Mechanical Engineering
C3  - 6th International Scientific Conference on Mechanical Engineering Technologies and Applications COMETa 2022
T1  - Computational aerodynamic analysis of a small wind turbine
EP  - 725
SP  - 719
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4217
ER  - 

@conference{
author = "Svorcan, Jelena and Tanović, Dragoljub and Kovačević, Aleksandar",
year = "2022",
abstract = "The growing climate change issues and the ongoing energy crisis stipulate
further exploitation of renewable energy sources and the development of systems
capable to efficiently generate clean energy. Among the most promising are wind
turbines, that come in different shapes and sizes. Small-scale wind turbines are
economic and particularly suitable for small consumers and rural areas. They are not
too common, and further research into their performance is necessary. This paper
focuses on the design and aerodynamic performance of a small horizontal-axis wind
turbine. Its rotor geometry is described while its basic aerodynamic coefficients, power
and thrust coefficients, are computed by finite volume method in ANSYS Fluent. Flow
is assumed as incompressible and viscous, while Reynolds-averaged Navier-Stokes
(RANS) equations are closed by different turbulence models. Wind turbine
aerodynamic performance is estimated, and different flow visualizations are provided,
particularly focusing on the wind turbine wake.",
publisher = "University of East Sarajevo, Faculty of Mechanical Engineering",
journal = "6th International Scientific Conference on Mechanical Engineering Technologies and Applications COMETa 2022",
title = "Computational aerodynamic analysis of a small wind turbine",
pages = "725-719",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4217"
}

Svorcan, J., Tanović, D.,& Kovačević, A.. (2022). Computational aerodynamic analysis of a small wind turbine. in 6th International Scientific Conference on Mechanical Engineering Technologies and Applications COMETa 2022
University of East Sarajevo, Faculty of Mechanical Engineering., 719-725.
https://hdl.handle.net/21.15107/rcub_machinery_4217

Svorcan J, Tanović D, Kovačević A. Computational aerodynamic analysis of a small wind turbine. in 6th International Scientific Conference on Mechanical Engineering Technologies and Applications COMETa 2022. 2022;:719-725.
https://hdl.handle.net/21.15107/rcub_machinery_4217 .

Svorcan, Jelena, Tanović, Dragoljub, Kovačević, Aleksandar, "Computational aerodynamic analysis of a small wind turbine" in 6th International Scientific Conference on Mechanical Engineering Technologies and Applications COMETa 2022 (2022):719-725,
https://hdl.handle.net/21.15107/rcub_machinery_4217 .

TY  - CONF
AU  - Svorcan, Jelena
AU  - Hasan, Mohammad Sakib
AU  - Tanović, Dragoljub Lj.
AU  - Popović, Lazar
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4216
AB  - Investigated topic of the presented research is transitional and turbulent flow around smallscale
propeller blade airfoils that are characterized by small chords, low speeds and therefore, low
Reynolds numbers. Here, an airfoil of medium relative thickness designed for nominal operating
conditions of 0.3 MRe is considered. Prior studies by simpler computational models (including
panel methods and 2D CFD simulations) have demonstrated that best lift-to-drag ratio (that is the
desired working regime) ranging from 60 to 80 can be achieved at angles-of-attack 4-6°. Here,
that observation is checked by more advanced turbulence models that incorporate the resolution
of at least a portion of turbulence spectrum, in particular transition SST scale-adaptive simulation
(SAS). Such complex turbulence models require 3D models and quite refined computational
grids. Furthermore, the necessary computational effort is truly enormous due to small time-steps
and slow convergence. The conducted computational process is presented and explained. Various
obtained results, both quantitative and qualitative, are provided. In the end, it can be concluded
that the choice of turbulence modeling (and/or resolving) greatly affects the final output, even at
medium angles-of-attack where laminar, attached flow dominates. Distinctive flow phenomena
still exist, and in order to be adequately simulated, a comprehensive modeling approach should be
adopted.
PB  - Belgrade : Serbian Society of Mechanics
C3  - Proceedings / The 8th International Congress of Serbian Society of Mechanics, Kragujevac, Serbia, June 28-30, 2021
T1  - Simulating transitional and turbulent flow around airfoils at medium angles-of-attack
EP  - 526
SP  - 519
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4216
ER  - 

@conference{
author = "Svorcan, Jelena and Hasan, Mohammad Sakib and Tanović, Dragoljub Lj. and Popović, Lazar",
year = "2021",
abstract = "Investigated topic of the presented research is transitional and turbulent flow around smallscale
propeller blade airfoils that are characterized by small chords, low speeds and therefore, low
Reynolds numbers. Here, an airfoil of medium relative thickness designed for nominal operating
conditions of 0.3 MRe is considered. Prior studies by simpler computational models (including
panel methods and 2D CFD simulations) have demonstrated that best lift-to-drag ratio (that is the
desired working regime) ranging from 60 to 80 can be achieved at angles-of-attack 4-6°. Here,
that observation is checked by more advanced turbulence models that incorporate the resolution
of at least a portion of turbulence spectrum, in particular transition SST scale-adaptive simulation
(SAS). Such complex turbulence models require 3D models and quite refined computational
grids. Furthermore, the necessary computational effort is truly enormous due to small time-steps
and slow convergence. The conducted computational process is presented and explained. Various
obtained results, both quantitative and qualitative, are provided. In the end, it can be concluded
that the choice of turbulence modeling (and/or resolving) greatly affects the final output, even at
medium angles-of-attack where laminar, attached flow dominates. Distinctive flow phenomena
still exist, and in order to be adequately simulated, a comprehensive modeling approach should be
adopted.",
publisher = "Belgrade : Serbian Society of Mechanics",
journal = "Proceedings / The 8th International Congress of Serbian Society of Mechanics, Kragujevac, Serbia, June 28-30, 2021",
title = "Simulating transitional and turbulent flow around airfoils at medium angles-of-attack",
pages = "526-519",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4216"
}

Svorcan, J., Hasan, M. S., Tanović, D. Lj.,& Popović, L.. (2021). Simulating transitional and turbulent flow around airfoils at medium angles-of-attack. in Proceedings / The 8th International Congress of Serbian Society of Mechanics, Kragujevac, Serbia, June 28-30, 2021
Belgrade : Serbian Society of Mechanics., 519-526.
https://hdl.handle.net/21.15107/rcub_machinery_4216

Svorcan J, Hasan MS, Tanović DL, Popović L. Simulating transitional and turbulent flow around airfoils at medium angles-of-attack. in Proceedings / The 8th International Congress of Serbian Society of Mechanics, Kragujevac, Serbia, June 28-30, 2021. 2021;:519-526.
https://hdl.handle.net/21.15107/rcub_machinery_4216 .

Svorcan, Jelena, Hasan, Mohammad Sakib, Tanović, Dragoljub Lj., Popović, Lazar, "Simulating transitional and turbulent flow around airfoils at medium angles-of-attack" in Proceedings / The 8th International Congress of Serbian Society of Mechanics, Kragujevac, Serbia, June 28-30, 2021 (2021):519-526,
https://hdl.handle.net/21.15107/rcub_machinery_4216 .

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  - 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  - 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  - 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  - Hasan, Sakib Mohammad
AU  - Ivanov, Toni
AU  - Tanović, Dragoljub
AU  - Simonović, Aleksandar
AU  - Vorkapić, Miloš
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5431
AB  - Additive manufacturing (AM) or 3D printing is becoming very popular in the aerospace and defense industry because of its ability to manufacture complex parts at a low price. Fused deposition modeling (FDM) is one of the most popular 3D printing techniques currently on the market. Acrylonitrile butadiene styrene (ABS) or poly (lactic acid) (PLA) are the two most commonly used 3D printed materials. Dimensional accuracy of FDM processed 3D printed materials (PLA, ABS, PETG, and HIPS) and experimental investigation of the tensile properties of those materials is the main scope of this paper. Tensile testing machine SHIMADZU AGS-X 100 kN was used to carry out the experimental study.
PB  - The Military Technical Institute, Belgrade, Serbia
C3  - 9th International Scientific Conference on Defensive Technologies, OTEH 2020, October 15-16, Belgrade, Serbia
T1  - Dimensional accuracy and experimental investigation on tensile behavior of various 3D printed materials
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5431
ER  - 

@conference{
author = "Hasan, Sakib Mohammad and Ivanov, Toni and Tanović, Dragoljub and Simonović, Aleksandar and Vorkapić, Miloš",
year = "2020",
abstract = "Additive manufacturing (AM) or 3D printing is becoming very popular in the aerospace and defense industry because of its ability to manufacture complex parts at a low price. Fused deposition modeling (FDM) is one of the most popular 3D printing techniques currently on the market. Acrylonitrile butadiene styrene (ABS) or poly (lactic acid) (PLA) are the two most commonly used 3D printed materials. Dimensional accuracy of FDM processed 3D printed materials (PLA, ABS, PETG, and HIPS) and experimental investigation of the tensile properties of those materials is the main scope of this paper. Tensile testing machine SHIMADZU AGS-X 100 kN was used to carry out the experimental study.",
publisher = "The Military Technical Institute, Belgrade, Serbia",
journal = "9th International Scientific Conference on Defensive Technologies, OTEH 2020, October 15-16, Belgrade, Serbia",
title = "Dimensional accuracy and experimental investigation on tensile behavior of various 3D printed materials",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5431"
}

Hasan, S. M., Ivanov, T., Tanović, D., Simonović, A.,& Vorkapić, M.. (2020). Dimensional accuracy and experimental investigation on tensile behavior of various 3D printed materials. in 9th International Scientific Conference on Defensive Technologies, OTEH 2020, October 15-16, Belgrade, Serbia
The Military Technical Institute, Belgrade, Serbia..
https://hdl.handle.net/21.15107/rcub_machinery_5431

Hasan SM, Ivanov T, Tanović D, Simonović A, Vorkapić M. Dimensional accuracy and experimental investigation on tensile behavior of various 3D printed materials. in 9th International Scientific Conference on Defensive Technologies, OTEH 2020, October 15-16, Belgrade, Serbia. 2020;.
https://hdl.handle.net/21.15107/rcub_machinery_5431 .

Hasan, Sakib Mohammad, Ivanov, Toni, Tanović, Dragoljub, Simonović, Aleksandar, Vorkapić, Miloš, "Dimensional accuracy and experimental investigation on tensile behavior of various 3D printed materials" in 9th International Scientific Conference on Defensive Technologies, OTEH 2020, October 15-16, Belgrade, Serbia (2020),
https://hdl.handle.net/21.15107/rcub_machinery_5431 .

TY  - JOUR
AU  - Vorkapić, Miloš
AU  - Ivanov, Toni
AU  - Baltić, Marija
AU  - Kreculj, Dragan D.
AU  - Tanović, Dragoljub Lj.
AU  - Kovačević, Aleksandar M.
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3321
AB  - Aditivna proizvodnja uključuje izradu proizvoda složene geometrije u relativno malim količinama, kao i izradu alata i kalupa za masovnu proizvodnju. Aditivnom proizvodnjom realizuju se modeli prema digitalnom prikazu, a primena je ogromna u različitim industrijskim sektorima. U poređenju sa tradicionalnom proizvodnjom, glavni parametri u odabiru aditivne tehnologije su: ušteda energije, smanjenje otpada, smanjenje upotrebe većeg broja alata, kao i optimizacija dizajna. Aditivna proizvodnja ili tehnologija 3D štampe rade na principu dodavanja materijala u slojevima, tj. model se formira od slojeva rastopljenog materijala koji se odmah hladi i očvršćava. 3D štampa omogućava čestu i jednostavnu modifikaciju modela na zahtev kupca, a pre ulaska modela u samu proizvodnju. Ovo čini komunikaciju na relaciji proizvođač-kupac dosta jednostavnom. Polazni materijal za izradu modela je polilaktična kiselina (PLA). To je ekološki termoplastični poliester koji se prirodno razgrađuje u prirodi. Na mehaničke karakteristike realizovanog modela od PLA značajno utiču različite tehnološke promenljive kao što su: prečnik brizgaljke, debljina definisanog sloja, procentualna vrednost ispune, veličina uzorka koji se puni, brzina punjenja i temperatura proizvodnje. Cilj ovog rada je da se prikaže postupak realizacije kutije elektronike za malogabaritni transmiter pritiska na 3D štampaču. Time se projektantu daje mogućnost da ispravi postojeće greške, modifikuje proizvod prema zahtevima krajnjih korisnika i na kraju daje polazna osnova za realizaciju prototipa novog proizvoda.
AB  - Additive manufacturing involves manufacturing of products with complex geometry in relatively small quantities, as well as the tools and molds manufacturing for mass production. With additive manufacturing, digital models are being realized and implementation is huge in various industrial sectors. Compared to traditional manufacturing, the main parameters in the choice of additive technology are: energy savings, waste reduction, reduced use of more tools and optimization of design. Additive manufacturing or 3D printing technology works on the principle of adding material in layers, i.e. the model is formed from layers of molten material that is immediately cooled and solidified. 3D printing allows to work with customers to solve design problems before embarking on a launch production. The starting material for the model is polyactic acid (PLA). It is an eco-friendly thermoplastic polyester, that breaks down naturally. The mechanical characteristics of the realized PLA model are significantly influenced by various technological variables, such as following: nozzle diameter, thickness of defined layer, percentage of fill, sample size to be filled, filling rate and production temperature. The aim of this paper is to present the process of realization of an electronics enclosure for a compact pressure transmitter on a 3D printer. This gives the designer the possibility to correct existing errors, modify the product according to the wishes of the end users and finally provides a starting point for the prototype of new product.
PB  - Savez inženjera i tehničara Srbije, Beograd
T2  - Tehnika
T1  - Upotreba 3D štampe u analizi dizajna realizovanog proizvoda - slučaj - kutija malogabaritnog transmitera pritiska
T1  - The usage of 3D printing in the analysis of the product design: Case: Electronic enclosure of compact pressure transmitter
EP  - 186
IS  - 2
SP  - 179
VL  - 75
DO  - 10.5937/tehnika2002179V
ER  - 

@article{
author = "Vorkapić, Miloš and Ivanov, Toni and Baltić, Marija and Kreculj, Dragan D. and Tanović, Dragoljub Lj. and Kovačević, Aleksandar M.",
year = "2020",
abstract = "Aditivna proizvodnja uključuje izradu proizvoda složene geometrije u relativno malim količinama, kao i izradu alata i kalupa za masovnu proizvodnju. Aditivnom proizvodnjom realizuju se modeli prema digitalnom prikazu, a primena je ogromna u različitim industrijskim sektorima. U poređenju sa tradicionalnom proizvodnjom, glavni parametri u odabiru aditivne tehnologije su: ušteda energije, smanjenje otpada, smanjenje upotrebe većeg broja alata, kao i optimizacija dizajna. Aditivna proizvodnja ili tehnologija 3D štampe rade na principu dodavanja materijala u slojevima, tj. model se formira od slojeva rastopljenog materijala koji se odmah hladi i očvršćava. 3D štampa omogućava čestu i jednostavnu modifikaciju modela na zahtev kupca, a pre ulaska modela u samu proizvodnju. Ovo čini komunikaciju na relaciji proizvođač-kupac dosta jednostavnom. Polazni materijal za izradu modela je polilaktična kiselina (PLA). To je ekološki termoplastični poliester koji se prirodno razgrađuje u prirodi. Na mehaničke karakteristike realizovanog modela od PLA značajno utiču različite tehnološke promenljive kao što su: prečnik brizgaljke, debljina definisanog sloja, procentualna vrednost ispune, veličina uzorka koji se puni, brzina punjenja i temperatura proizvodnje. Cilj ovog rada je da se prikaže postupak realizacije kutije elektronike za malogabaritni transmiter pritiska na 3D štampaču. Time se projektantu daje mogućnost da ispravi postojeće greške, modifikuje proizvod prema zahtevima krajnjih korisnika i na kraju daje polazna osnova za realizaciju prototipa novog proizvoda., Additive manufacturing involves manufacturing of products with complex geometry in relatively small quantities, as well as the tools and molds manufacturing for mass production. With additive manufacturing, digital models are being realized and implementation is huge in various industrial sectors. Compared to traditional manufacturing, the main parameters in the choice of additive technology are: energy savings, waste reduction, reduced use of more tools and optimization of design. Additive manufacturing or 3D printing technology works on the principle of adding material in layers, i.e. the model is formed from layers of molten material that is immediately cooled and solidified. 3D printing allows to work with customers to solve design problems before embarking on a launch production. The starting material for the model is polyactic acid (PLA). It is an eco-friendly thermoplastic polyester, that breaks down naturally. The mechanical characteristics of the realized PLA model are significantly influenced by various technological variables, such as following: nozzle diameter, thickness of defined layer, percentage of fill, sample size to be filled, filling rate and production temperature. The aim of this paper is to present the process of realization of an electronics enclosure for a compact pressure transmitter on a 3D printer. This gives the designer the possibility to correct existing errors, modify the product according to the wishes of the end users and finally provides a starting point for the prototype of new product.",
publisher = "Savez inženjera i tehničara Srbije, Beograd",
journal = "Tehnika",
title = "Upotreba 3D štampe u analizi dizajna realizovanog proizvoda - slučaj - kutija malogabaritnog transmitera pritiska, The usage of 3D printing in the analysis of the product design: Case: Electronic enclosure of compact pressure transmitter",
pages = "186-179",
number = "2",
volume = "75",
doi = "10.5937/tehnika2002179V"
}

Vorkapić, M., Ivanov, T., Baltić, M., Kreculj, D. D., Tanović, D. Lj.,& Kovačević, A. M.. (2020). Upotreba 3D štampe u analizi dizajna realizovanog proizvoda - slučaj - kutija malogabaritnog transmitera pritiska. in Tehnika
Savez inženjera i tehničara Srbije, Beograd., 75(2), 179-186.
https://doi.org/10.5937/tehnika2002179V

Vorkapić M, Ivanov T, Baltić M, Kreculj DD, Tanović DL, Kovačević AM. Upotreba 3D štampe u analizi dizajna realizovanog proizvoda - slučaj - kutija malogabaritnog transmitera pritiska. in Tehnika. 2020;75(2):179-186.
doi:10.5937/tehnika2002179V .

Vorkapić, Miloš, Ivanov, Toni, Baltić, Marija, Kreculj, Dragan D., Tanović, Dragoljub Lj., Kovačević, Aleksandar M., "Upotreba 3D štampe u analizi dizajna realizovanog proizvoda - slučaj - kutija malogabaritnog transmitera pritiska" in Tehnika, 75, no. 2 (2020):179-186,
https://doi.org/10.5937/tehnika2002179V . .