TY  - JOUR
AU  - Burazer, Jela
AU  - Skoko, Dragisa
AU  - Bukurov, Masa
AU  - Novković, Đorđe
AU  - Adzic, Vuk
AU  - Lecic, Milan
AU  - Vorotovic, Goran
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5464
AB  - Pneumatic control has found irreplaceable applications in the control of machine parts, where high accuracy is required. One of the problems that occur with the long-term use of pneumatic comparator is the fouling of its head. This requires interruption of pneumatic comparator’s work for maintenance, i.e., cleaning the device from accumulated impurities. Fouling of the comparator head is the consequence of the vacuum in the area between the measuring nozzle and the measured workpiece. This paper studies the possibility of vacuum reduction — both in its size and strength by varying the measuring nozzle inclination angle. The research is conducted experimentally via test rig designed for this purpose. The inclination angle of the measuring nozzle was varied from 
°to 
°, with the steps of 
°. The analysis comprises the influence of the measuring nozzle inclination on both radial and the axial pressure distribution on the workpiece surface, as well as the corresponding consequences on the comparator’s pneumatic sensitivity and its application range. Experimental results for four different supply pressures and six axial distances between the measuring nozzle front cross-section and the workpiece surface are presented. It is shown that it is possible to reduce the size of the vacuum zone and decrease the vacuum by inclining the measuring nozzle by a certain angle, depending on the supply pressure 
. For a certain value of the supply pressure, it is also possible to move the vacuum zone away from the measuring nozzle’s axis when the nozzle is inclined by the optimal angle. On the downside, inclination of the measuring nozzle leads to a decrease in the application range of the comparator.
T2  - Measurement
T1  - Possibility for improving the performance of a differential pneumatic comparator by inclining the measuring nozzle
VL  - 208
DO  - 10.1016/j.measurement.2022.112415
ER  - 

@article{
author = "Burazer, Jela and Skoko, Dragisa and Bukurov, Masa and Novković, Đorđe and Adzic, Vuk and Lecic, Milan and Vorotovic, Goran",
year = "2023",
abstract = "Pneumatic control has found irreplaceable applications in the control of machine parts, where high accuracy is required. One of the problems that occur with the long-term use of pneumatic comparator is the fouling of its head. This requires interruption of pneumatic comparator’s work for maintenance, i.e., cleaning the device from accumulated impurities. Fouling of the comparator head is the consequence of the vacuum in the area between the measuring nozzle and the measured workpiece. This paper studies the possibility of vacuum reduction — both in its size and strength by varying the measuring nozzle inclination angle. The research is conducted experimentally via test rig designed for this purpose. The inclination angle of the measuring nozzle was varied from 
°to 
°, with the steps of 
°. The analysis comprises the influence of the measuring nozzle inclination on both radial and the axial pressure distribution on the workpiece surface, as well as the corresponding consequences on the comparator’s pneumatic sensitivity and its application range. Experimental results for four different supply pressures and six axial distances between the measuring nozzle front cross-section and the workpiece surface are presented. It is shown that it is possible to reduce the size of the vacuum zone and decrease the vacuum by inclining the measuring nozzle by a certain angle, depending on the supply pressure 
. For a certain value of the supply pressure, it is also possible to move the vacuum zone away from the measuring nozzle’s axis when the nozzle is inclined by the optimal angle. On the downside, inclination of the measuring nozzle leads to a decrease in the application range of the comparator.",
journal = "Measurement",
title = "Possibility for improving the performance of a differential pneumatic comparator by inclining the measuring nozzle",
volume = "208",
doi = "10.1016/j.measurement.2022.112415"
}

Burazer, J., Skoko, D., Bukurov, M., Novković, Đ., Adzic, V., Lecic, M.,& Vorotovic, G.. (2023). Possibility for improving the performance of a differential pneumatic comparator by inclining the measuring nozzle. in Measurement, 208.
https://doi.org/10.1016/j.measurement.2022.112415

Burazer J, Skoko D, Bukurov M, Novković Đ, Adzic V, Lecic M, Vorotovic G. Possibility for improving the performance of a differential pneumatic comparator by inclining the measuring nozzle. in Measurement. 2023;208.
doi:10.1016/j.measurement.2022.112415 .

Burazer, Jela, Skoko, Dragisa, Bukurov, Masa, Novković, Đorđe, Adzic, Vuk, Lecic, Milan, Vorotovic, Goran, "Possibility for improving the performance of a differential pneumatic comparator by inclining the measuring nozzle" in Measurement, 208 (2023),
https://doi.org/10.1016/j.measurement.2022.112415 . .

TY  - JOUR
AU  - Burazer, Jela M.
AU  - Novković, Đorđe 
AU  - Ćoćić, Aleksandar
AU  - Bukurov, M.
AU  - Lečić, Milan
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3713
AB  - Vortex tube is a device without moving parts with ability to separate pressurized gas into two streams: cold and hot. This is a consequence of the Eckert-Wiese effect, which is responsible for spontaneous redistribution of total energy within the flow domain. In order for vortex tubes to work properly, there are some constraints which have to be fulfilled. The most important constraint in that sense is the L/D ratio. One part of this paper is dedicated to the research of the influence of L/D ratio on the energy separation in a vortex tube, i.e. to the values of total temperatures on cold and hot outlets of the device. On the other hand, experimental research of the inner flow is quite challenging since vortex tube is a device of small dimensions. Hence, we are relaying on numerical computations. One of important quantities that has to be prescribed in these computations is the turbulent Prandtl number Pr-T. Because of that, the other part of this paper is dedicated to research of the influence of Pr-T on the results of numerical computations. The research is conducted using open-source software OpenFOAM. Turbulence is modelled using two-equation and RST models. For small L/D ratios there is a secondary circulation that acts as a refrigeration cycle, and for greater L/D ratios distribution of velocity and temperature inside the vortex tube remains the same, regardless of the stagnation point presence. It is not justified to increase the length of the vortex tube beyond 20D since the change in cold total temperature inside the vortex tube as well at the cold outlet is practically null. For L/D variation from 1.8 to 10, the cold outlet temperature changes from 270.9 K to 266.8 K, and then rises to its final value of 270.5 K. For L/D ratio from 20 to 60, the total temperature at cold end remains unchanged at 271.3 K. We obtained good results with the unit value of turbulent Prandtl number, and demonstrated that increasing the Pr-T beyond unit value is not necessary in order to numerically obtain the energy separation inside the vortex tube.
PB  - Isfahan Univ Technology, Isfahan
T2  - Journal of Applied Fluid Mechanics
T1  - Numerical Study of the L/D Ratio and Turbulent Prandtl Number Effect on Energy Separation in a Counter-Flow Vortex Tube
EP  - 1511
IS  - 5
SP  - 1503
VL  - 15
DO  - 10.47176/jafm.15.05.1168
ER  - 

@article{
author = "Burazer, Jela M. and Novković, Đorđe  and Ćoćić, Aleksandar and Bukurov, M. and Lečić, Milan",
year = "2022",
abstract = "Vortex tube is a device without moving parts with ability to separate pressurized gas into two streams: cold and hot. This is a consequence of the Eckert-Wiese effect, which is responsible for spontaneous redistribution of total energy within the flow domain. In order for vortex tubes to work properly, there are some constraints which have to be fulfilled. The most important constraint in that sense is the L/D ratio. One part of this paper is dedicated to the research of the influence of L/D ratio on the energy separation in a vortex tube, i.e. to the values of total temperatures on cold and hot outlets of the device. On the other hand, experimental research of the inner flow is quite challenging since vortex tube is a device of small dimensions. Hence, we are relaying on numerical computations. One of important quantities that has to be prescribed in these computations is the turbulent Prandtl number Pr-T. Because of that, the other part of this paper is dedicated to research of the influence of Pr-T on the results of numerical computations. The research is conducted using open-source software OpenFOAM. Turbulence is modelled using two-equation and RST models. For small L/D ratios there is a secondary circulation that acts as a refrigeration cycle, and for greater L/D ratios distribution of velocity and temperature inside the vortex tube remains the same, regardless of the stagnation point presence. It is not justified to increase the length of the vortex tube beyond 20D since the change in cold total temperature inside the vortex tube as well at the cold outlet is practically null. For L/D variation from 1.8 to 10, the cold outlet temperature changes from 270.9 K to 266.8 K, and then rises to its final value of 270.5 K. For L/D ratio from 20 to 60, the total temperature at cold end remains unchanged at 271.3 K. We obtained good results with the unit value of turbulent Prandtl number, and demonstrated that increasing the Pr-T beyond unit value is not necessary in order to numerically obtain the energy separation inside the vortex tube.",
publisher = "Isfahan Univ Technology, Isfahan",
journal = "Journal of Applied Fluid Mechanics",
title = "Numerical Study of the L/D Ratio and Turbulent Prandtl Number Effect on Energy Separation in a Counter-Flow Vortex Tube",
pages = "1511-1503",
number = "5",
volume = "15",
doi = "10.47176/jafm.15.05.1168"
}

Burazer, J. M., Novković, Đ., Ćoćić, A., Bukurov, M.,& Lečić, M.. (2022). Numerical Study of the L/D Ratio and Turbulent Prandtl Number Effect on Energy Separation in a Counter-Flow Vortex Tube. in Journal of Applied Fluid Mechanics
Isfahan Univ Technology, Isfahan., 15(5), 1503-1511.
https://doi.org/10.47176/jafm.15.05.1168

Burazer JM, Novković Đ, Ćoćić A, Bukurov M, Lečić M. Numerical Study of the L/D Ratio and Turbulent Prandtl Number Effect on Energy Separation in a Counter-Flow Vortex Tube. in Journal of Applied Fluid Mechanics. 2022;15(5):1503-1511.
doi:10.47176/jafm.15.05.1168 .

Burazer, Jela M., Novković, Đorđe , Ćoćić, Aleksandar, Bukurov, M., Lečić, Milan, "Numerical Study of the L/D Ratio and Turbulent Prandtl Number Effect on Energy Separation in a Counter-Flow Vortex Tube" in Journal of Applied Fluid Mechanics, 15, no. 5 (2022):1503-1511,
https://doi.org/10.47176/jafm.15.05.1168 . .

TY  - JOUR
AU  - Burazer, Jela
AU  - Skoko, Dragiša
AU  - Novković, Đorđe 
AU  - Lečić, Milan
AU  - Vorotović, Goran
AU  - Januzović, Miloš
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6241
AB  - Back-pressure air gauging is an effective and practical way of controlling
machine parts in large-scale production. It is a non-contact measuring
technique based on the flapper-nozzle effect. The proper functioning of a
differential pneumatic comparator depends on several geometric para–
meters as well as flow conditions inside the device. The main problems of
this controlling technique are the fouling of the measuring nozzle head and
changes in the accuracy of the comparator. This paper examines the
influence of the supply pressure, the diameter of the orifice in the
measuring branch, and the axial distance in the flapper-nozzle area on
pneumatic comparator performance. In a way, we are trying to optimize
the performance of a given pneumatic comparator with respect to the
tolerance field for which it is intended. The size, strength, and position of
the vacuum in the flapper-nozzle area depend on the supply pressure and
the axial distance between the measuring nozzle outlet cross-section and
the workpiece surface. For a certain combination of these two parameters,
we can influence the vacuum quantities. A pneumatic sensitivity of a
comparator can be increased by increasing the supply pressure. The
greater accuracy of the back pressure air gauge, the smaller the
application range, i.e. the tolerance field that we can control with a given
device.
T2  - FME Transactions
T1  - On some important quantities influencing proper functioning of the differential pneumatic comparator
EP  - 700
IS  - 4
SP  - 693
VL  - 50
DO  - doi: 10.5937/fme2204693B
ER  - 

@article{
author = "Burazer, Jela and Skoko, Dragiša and Novković, Đorđe  and Lečić, Milan and Vorotović, Goran and Januzović, Miloš",
year = "2022",
abstract = "Back-pressure air gauging is an effective and practical way of controlling
machine parts in large-scale production. It is a non-contact measuring
technique based on the flapper-nozzle effect. The proper functioning of a
differential pneumatic comparator depends on several geometric para–
meters as well as flow conditions inside the device. The main problems of
this controlling technique are the fouling of the measuring nozzle head and
changes in the accuracy of the comparator. This paper examines the
influence of the supply pressure, the diameter of the orifice in the
measuring branch, and the axial distance in the flapper-nozzle area on
pneumatic comparator performance. In a way, we are trying to optimize
the performance of a given pneumatic comparator with respect to the
tolerance field for which it is intended. The size, strength, and position of
the vacuum in the flapper-nozzle area depend on the supply pressure and
the axial distance between the measuring nozzle outlet cross-section and
the workpiece surface. For a certain combination of these two parameters,
we can influence the vacuum quantities. A pneumatic sensitivity of a
comparator can be increased by increasing the supply pressure. The
greater accuracy of the back pressure air gauge, the smaller the
application range, i.e. the tolerance field that we can control with a given
device.",
journal = "FME Transactions",
title = "On some important quantities influencing proper functioning of the differential pneumatic comparator",
pages = "700-693",
number = "4",
volume = "50",
doi = "doi: 10.5937/fme2204693B"
}

Burazer, J., Skoko, D., Novković, Đ., Lečić, M., Vorotović, G.,& Januzović, M.. (2022). On some important quantities influencing proper functioning of the differential pneumatic comparator. in FME Transactions, 50(4), 693-700.
https://doi.org/doi: 10.5937/fme2204693B

Burazer J, Skoko D, Novković Đ, Lečić M, Vorotović G, Januzović M. On some important quantities influencing proper functioning of the differential pneumatic comparator. in FME Transactions. 2022;50(4):693-700.
doi:doi: 10.5937/fme2204693B .

Burazer, Jela, Skoko, Dragiša, Novković, Đorđe , Lečić, Milan, Vorotović, Goran, Januzović, Miloš, "On some important quantities influencing proper functioning of the differential pneumatic comparator" in FME Transactions, 50, no. 4 (2022):693-700,
https://doi.org/doi: 10.5937/fme2204693B . .

TY  - PAT
AU  - Novković, Đorđe 
AU  - Буразер, Јела
PY  - 2020
UR  - https://reg.zis.gov.rs/patreg/?t=u
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5395
T2  - https://reg.zis.gov.rs/patreg/?t=u
T1  - Модуларна делимично потапајућа вишестепена аксијална пумпа великог капацитета за наводњавање и одбрану од поплава
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5395
ER  - 

@misc{
author = "Novković, Đorđe  and Буразер, Јела",
year = "2020",
journal = "https://reg.zis.gov.rs/patreg/?t=u",
title = "Модуларна делимично потапајућа вишестепена аксијална пумпа великог капацитета за наводњавање и одбрану од поплава",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5395"
}

Novković, Đ.,& Буразер, Ј.. (2020). Модуларна делимично потапајућа вишестепена аксијална пумпа великог капацитета за наводњавање и одбрану од поплава. in https://reg.zis.gov.rs/patreg/?t=u.
https://hdl.handle.net/21.15107/rcub_machinery_5395

Novković Đ, Буразер Ј. Модуларна делимично потапајућа вишестепена аксијална пумпа великог капацитета за наводњавање и одбрану од поплава. in https://reg.zis.gov.rs/patreg/?t=u. 2020;.
https://hdl.handle.net/21.15107/rcub_machinery_5395 .

Novković, Đorđe , Буразер, Јела, "Модуларна делимично потапајућа вишестепена аксијална пумпа великог капацитета за наводњавање и одбрану од поплава" in https://reg.zis.gov.rs/patreg/?t=u (2020),
https://hdl.handle.net/21.15107/rcub_machinery_5395 .

TY  - THES
AU  - Novković, Đorđe 
PY  - 2019
UR  - https://nardus.mpn.gov.rs/handle/123456789/11613
UR  - http://eteze.bg.ac.rs/application/showtheses?thesesId=6964
UR  - https://fedorabg.bg.ac.rs/fedora/get/o:20413/bdef:Content/download
UR  - http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=51652111
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5589
AB  - У дисертацији је истраживано турбулентно вихорно и безвихорно струјање нестишљивог флуида у правим конусним дифузорима...
AB  - In this dissertation a research regarding swirling and swirl-free turbulentflow of incompressible fluid is presented....
PB  - Универзитет у Београду, Машински факултет
T2  - Универзитет у Београду
T1  - Моделирање и нумерички прорачуни струјања нестишљивог флуида у правим конусним дифузорима
UR  - https://hdl.handle.net/21.15107/rcub_nardus_11613
ER  - 

@phdthesis{
author = "Novković, Đorđe ",
year = "2019",
abstract = "У дисертацији је истраживано турбулентно вихорно и безвихорно струјање нестишљивог флуида у правим конусним дифузорима..., In this dissertation a research regarding swirling and swirl-free turbulentflow of incompressible fluid is presented....",
publisher = "Универзитет у Београду, Машински факултет",
journal = "Универзитет у Београду",
title = "Моделирање и нумерички прорачуни струјања нестишљивог флуида у правим конусним дифузорима",
url = "https://hdl.handle.net/21.15107/rcub_nardus_11613"
}

Novković, Đ.. (2019). Моделирање и нумерички прорачуни струјања нестишљивог флуида у правим конусним дифузорима. in Универзитет у Београду
Универзитет у Београду, Машински факултет..
https://hdl.handle.net/21.15107/rcub_nardus_11613

Novković Đ. Моделирање и нумерички прорачуни струјања нестишљивог флуида у правим конусним дифузорима. in Универзитет у Београду. 2019;.
https://hdl.handle.net/21.15107/rcub_nardus_11613 .

Novković, Đorđe , "Моделирање и нумерички прорачуни струјања нестишљивог флуида у правим конусним дифузорима" in Универзитет у Београду (2019),
https://hdl.handle.net/21.15107/rcub_nardus_11613 .

TY  - CONF
AU  - Novković, Đorđe
AU  - Burazer, Jela
AU  - Ćoćić, Aleksandar
AU  - Lečić, Milan
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5586
PB  - Serbian Society of Mechanics, Belgrade
C3  - 7th International Congress of Serbian Society of Mechanics
T1  - Implementation of Hamba k-epsilon Turbulence Model in OpenFOAM Software
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5586
ER  - 

@conference{
author = "Novković, Đorđe and Burazer, Jela and Ćoćić, Aleksandar and Lečić, Milan",
year = "2019",
publisher = "Serbian Society of Mechanics, Belgrade",
journal = "7th International Congress of Serbian Society of Mechanics",
title = "Implementation of Hamba k-epsilon Turbulence Model in OpenFOAM Software",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5586"
}

Novković, Đ., Burazer, J., Ćoćić, A.,& Lečić, M.. (2019). Implementation of Hamba k-epsilon Turbulence Model in OpenFOAM Software. in 7th International Congress of Serbian Society of Mechanics
Serbian Society of Mechanics, Belgrade..
https://hdl.handle.net/21.15107/rcub_machinery_5586

Novković Đ, Burazer J, Ćoćić A, Lečić M. Implementation of Hamba k-epsilon Turbulence Model in OpenFOAM Software. in 7th International Congress of Serbian Society of Mechanics. 2019;.
https://hdl.handle.net/21.15107/rcub_machinery_5586 .

Novković, Đorđe, Burazer, Jela, Ćoćić, Aleksandar, Lečić, Milan, "Implementation of Hamba k-epsilon Turbulence Model in OpenFOAM Software" in 7th International Congress of Serbian Society of Mechanics (2019),
https://hdl.handle.net/21.15107/rcub_machinery_5586 .

TY  - JOUR
AU  - Burazer, Jela M.
AU  - Novković, Đorđe 
AU  - Knežević, Darko M.
AU  - Lečić, Milan
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3040
AB  - Cilj ovog rada je numerička analiza fenomena raslojavanja polja totalne temperature u turbulentnom stišljivom vihornom strujanju u cilindričnoj cevi. U tom smislu, raslojavanje polja totalne temperature u vrtložnoj cevi sa potpuno zatvorenim otvorom za izlaz ohlađenog gasa se analizira numeričkim putem primenom softverom otvorenog tipa - OpenFOAM. Validacija dobijenih numeričkih rezultata je vršena poređenjem sa vrednostima dobijenim eksperimentalnim putem. Za numeričke proračune koriste se dvojednačinski model (standardni k-ε) i puni naponski model turbulencije (LRR). Proračunski domen se smatra dvodimenzionalnim, a radni fluid - vazduh tretira se kao kalorički idealni gas. Uticaj broja ćelija u mreži je izvršen pomoću četiri različite veličine mreže. Raspodele jačine vihora, srednjeg vihora i ugaone brzine jasno ukazuju na uticaj prisustva vihora u strujnom polju. Sa druge strane, združeno sa njihovom vrednošću upućuju i na fiziku ovog izuzetno kompleksnog strujno-termodinamičkog fenomena kakav je fenomen raslojavanja polja totalne temperature. Na osnovu vrednosti i raspodela ovih strujnih veličina, izvršeno je i poređenje između stišljivog i nestišljivog turbulentnog vihornog strujanja.
AB  - The aim of this paper is to numerically analyze the energy separation phenomenon in turbulent compressible swirling flow in a cylindrical tube. In that sense, the energy separation in a vortex tube with orifice at cold end closed completely is examined numerically using OpenFOAM software. Obtained results are validated with the experimental ones. For numerical calculations, both two-equation (standard k-ε) and full Reynolds stress turbulence models (LRR) are used. The computational domain is considered to be two-dimensional, and the working fluid - air is treated as calorically perfect gas. Mesh independence test is carried out for four different mesh sizes. Distributions of swirling flow intensity, average swirl and angular velocity clearly show the influence of the swirl presence in the flow. The values of these quantities point to the physics of this extremely complex flow-thermodynamic phenomenon, such is the energy separation. Based on values and distributions of these flow quantities a comparison between incompressible and compressible turbulent swirling flow is performed.
PB  - Univerzitet u Beogradu - Mašinski fakultet, Beograd
T2  - FME Transactions
T1  - Numeričko istraživanje stišljivog turbulentnog vihornog strujanja sa raslojavanjem polja totalne temperature u cevi
T1  - Numerical research of compressible turbulent swirl flow with energy separation in a cylindrical tube
EP  - 22
IS  - 1
SP  - 16
VL  - 47
DO  - 10.5937/fmet1901016B
ER  - 

@article{
author = "Burazer, Jela M. and Novković, Đorđe  and Knežević, Darko M. and Lečić, Milan",
year = "2019",
abstract = "Cilj ovog rada je numerička analiza fenomena raslojavanja polja totalne temperature u turbulentnom stišljivom vihornom strujanju u cilindričnoj cevi. U tom smislu, raslojavanje polja totalne temperature u vrtložnoj cevi sa potpuno zatvorenim otvorom za izlaz ohlađenog gasa se analizira numeričkim putem primenom softverom otvorenog tipa - OpenFOAM. Validacija dobijenih numeričkih rezultata je vršena poređenjem sa vrednostima dobijenim eksperimentalnim putem. Za numeričke proračune koriste se dvojednačinski model (standardni k-ε) i puni naponski model turbulencije (LRR). Proračunski domen se smatra dvodimenzionalnim, a radni fluid - vazduh tretira se kao kalorički idealni gas. Uticaj broja ćelija u mreži je izvršen pomoću četiri različite veličine mreže. Raspodele jačine vihora, srednjeg vihora i ugaone brzine jasno ukazuju na uticaj prisustva vihora u strujnom polju. Sa druge strane, združeno sa njihovom vrednošću upućuju i na fiziku ovog izuzetno kompleksnog strujno-termodinamičkog fenomena kakav je fenomen raslojavanja polja totalne temperature. Na osnovu vrednosti i raspodela ovih strujnih veličina, izvršeno je i poređenje između stišljivog i nestišljivog turbulentnog vihornog strujanja., The aim of this paper is to numerically analyze the energy separation phenomenon in turbulent compressible swirling flow in a cylindrical tube. In that sense, the energy separation in a vortex tube with orifice at cold end closed completely is examined numerically using OpenFOAM software. Obtained results are validated with the experimental ones. For numerical calculations, both two-equation (standard k-ε) and full Reynolds stress turbulence models (LRR) are used. The computational domain is considered to be two-dimensional, and the working fluid - air is treated as calorically perfect gas. Mesh independence test is carried out for four different mesh sizes. Distributions of swirling flow intensity, average swirl and angular velocity clearly show the influence of the swirl presence in the flow. The values of these quantities point to the physics of this extremely complex flow-thermodynamic phenomenon, such is the energy separation. Based on values and distributions of these flow quantities a comparison between incompressible and compressible turbulent swirling flow is performed.",
publisher = "Univerzitet u Beogradu - Mašinski fakultet, Beograd",
journal = "FME Transactions",
title = "Numeričko istraživanje stišljivog turbulentnog vihornog strujanja sa raslojavanjem polja totalne temperature u cevi, Numerical research of compressible turbulent swirl flow with energy separation in a cylindrical tube",
pages = "22-16",
number = "1",
volume = "47",
doi = "10.5937/fmet1901016B"
}

Burazer, J. M., Novković, Đ., Knežević, D. M.,& Lečić, M.. (2019). Numeričko istraživanje stišljivog turbulentnog vihornog strujanja sa raslojavanjem polja totalne temperature u cevi. in FME Transactions
Univerzitet u Beogradu - Mašinski fakultet, Beograd., 47(1), 16-22.
https://doi.org/10.5937/fmet1901016B

Burazer JM, Novković Đ, Knežević DM, Lečić M. Numeričko istraživanje stišljivog turbulentnog vihornog strujanja sa raslojavanjem polja totalne temperature u cevi. in FME Transactions. 2019;47(1):16-22.
doi:10.5937/fmet1901016B .

Burazer, Jela M., Novković, Đorđe , Knežević, Darko M., Lečić, Milan, "Numeričko istraživanje stišljivog turbulentnog vihornog strujanja sa raslojavanjem polja totalne temperature u cevi" in FME Transactions, 47, no. 1 (2019):16-22,
https://doi.org/10.5937/fmet1901016B . .

TY  - JOUR
AU  - Novković, Đorđe 
AU  - Burazer, Jela M.
AU  - Ćoćić, Aleksandar
AU  - Lečić, Milan
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2849
AB  - This paper presents research regarding the influence of turbulent kinetic energy (TKE) level on accuracy of Reynolds averaged Navier-Stokes (RANS) based turbulence models. A theoretical analysis of influence TKE level on accuracy of the RANS turbulence models has been performed according to the Boussinesq hypothesis definition. After that, this theoretical analysis has been investigated by comparison of numerically and experimentally obtained results on the test case of a steady-state incompressible swirl-free flow in a straight conical diffuser named Azad diffuser. Numerical calculations have been performed using the OpenFOAM CFD software and first and second-order closure turbulence models. TKE level, velocity profiles and Reynolds stresses have been calculated downstream in four different cross sections of the diffuser. Certain conclusions about modeling turbulent flows by k - epsilon and LRR turbulence models have been made by comparing the velocity profiles, TKE distribution and Reynolds stresses on the selected cross sections.
PB  - Srpsko društvo za mehaniku, Beograd
T2  - Theoretical and Applied Mechanics
T1  - On the influence of turbulent kinetic energy level on accuracy of k - epsilon and lrr turbulence models
EP  - 149
IS  - 2
SP  - 139
VL  - 45
DO  - 10.2298/TAM171201009N
ER  - 

@article{
author = "Novković, Đorđe  and Burazer, Jela M. and Ćoćić, Aleksandar and Lečić, Milan",
year = "2018",
abstract = "This paper presents research regarding the influence of turbulent kinetic energy (TKE) level on accuracy of Reynolds averaged Navier-Stokes (RANS) based turbulence models. A theoretical analysis of influence TKE level on accuracy of the RANS turbulence models has been performed according to the Boussinesq hypothesis definition. After that, this theoretical analysis has been investigated by comparison of numerically and experimentally obtained results on the test case of a steady-state incompressible swirl-free flow in a straight conical diffuser named Azad diffuser. Numerical calculations have been performed using the OpenFOAM CFD software and first and second-order closure turbulence models. TKE level, velocity profiles and Reynolds stresses have been calculated downstream in four different cross sections of the diffuser. Certain conclusions about modeling turbulent flows by k - epsilon and LRR turbulence models have been made by comparing the velocity profiles, TKE distribution and Reynolds stresses on the selected cross sections.",
publisher = "Srpsko društvo za mehaniku, Beograd",
journal = "Theoretical and Applied Mechanics",
title = "On the influence of turbulent kinetic energy level on accuracy of k - epsilon and lrr turbulence models",
pages = "149-139",
number = "2",
volume = "45",
doi = "10.2298/TAM171201009N"
}

Novković, Đ., Burazer, J. M., Ćoćić, A.,& Lečić, M.. (2018). On the influence of turbulent kinetic energy level on accuracy of k - epsilon and lrr turbulence models. in Theoretical and Applied Mechanics
Srpsko društvo za mehaniku, Beograd., 45(2), 139-149.
https://doi.org/10.2298/TAM171201009N

Novković Đ, Burazer JM, Ćoćić A, Lečić M. On the influence of turbulent kinetic energy level on accuracy of k - epsilon and lrr turbulence models. in Theoretical and Applied Mechanics. 2018;45(2):139-149.
doi:10.2298/TAM171201009N .

Novković, Đorđe , Burazer, Jela M., Ćoćić, Aleksandar, Lečić, Milan, "On the influence of turbulent kinetic energy level on accuracy of k - epsilon and lrr turbulence models" in Theoretical and Applied Mechanics, 45, no. 2 (2018):139-149,
https://doi.org/10.2298/TAM171201009N . .

TY  - CONF
AU  - Novković, Đorđe
AU  - Burazer, Jela
AU  - Ćoćić, Aleksandar
AU  - Lečić, Milan
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5585
C3  - 6th International Congress of Serbian Society of Mechanics
T1  - Numerical Research of Swirl-Free flow in Azad Diffuser
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5585
ER  - 

@conference{
author = "Novković, Đorđe and Burazer, Jela and Ćoćić, Aleksandar and Lečić, Milan",
year = "2017",
journal = "6th International Congress of Serbian Society of Mechanics",
title = "Numerical Research of Swirl-Free flow in Azad Diffuser",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5585"
}

Novković, Đ., Burazer, J., Ćoćić, A.,& Lečić, M.. (2017). Numerical Research of Swirl-Free flow in Azad Diffuser. in 6th International Congress of Serbian Society of Mechanics.
https://hdl.handle.net/21.15107/rcub_machinery_5585

Novković Đ, Burazer J, Ćoćić A, Lečić M. Numerical Research of Swirl-Free flow in Azad Diffuser. in 6th International Congress of Serbian Society of Mechanics. 2017;.
https://hdl.handle.net/21.15107/rcub_machinery_5585 .

Novković, Đorđe, Burazer, Jela, Ćoćić, Aleksandar, Lečić, Milan, "Numerical Research of Swirl-Free flow in Azad Diffuser" in 6th International Congress of Serbian Society of Mechanics (2017),
https://hdl.handle.net/21.15107/rcub_machinery_5585 .

TY  - JOUR
AU  - Novković, Đorđe 
AU  - Burazer, Jela M.
AU  - Ćoćić, Aleksandar
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2604
AB  - Numerical flow simulations have been carried out in order to analyze the possibilities of numerical prediction of a steady-state incompressible air flow through a conical diffuser named Azad diffuser. The spreading angle of this diffuser is 8 degrees and it has cylindrical parts of the constant diameter in the inlet and outlet flow zones. Numerical analysis has been performed by the use of the standard k-epsilon turbulence model. The simulations have been performed using the Ansys CFX and the OpenFOAM software for cases of 2-D and 3-D computational domains. In both cases a Ally developed turbulent flow at the inlet section of diffuser is present. The numerical flow simulation in a 2-D computational domain has been performed under the assumption of an axisymmetric flow in the diffuser. Numerically obtained results have been compared with experimental data. Results obtained with these two softwares have also been mutually compared. At the end the results obtained by CFD for the cases of 2-D and 3-D computational domains have been mutually compared, and the advantages and disadvantages of performing numerical simulations under the assumption of an axisymmetric flow in the diffuser have been analyzed.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - Comparison of different cfd software performances in the case of an incompressible air flow through a straight conical diffuser
EP  - S874
SP  - S863
VL  - 21
DO  - 10.2298/TSCI161020329N
ER  - 

@article{
author = "Novković, Đorđe  and Burazer, Jela M. and Ćoćić, Aleksandar",
year = "2017",
abstract = "Numerical flow simulations have been carried out in order to analyze the possibilities of numerical prediction of a steady-state incompressible air flow through a conical diffuser named Azad diffuser. The spreading angle of this diffuser is 8 degrees and it has cylindrical parts of the constant diameter in the inlet and outlet flow zones. Numerical analysis has been performed by the use of the standard k-epsilon turbulence model. The simulations have been performed using the Ansys CFX and the OpenFOAM software for cases of 2-D and 3-D computational domains. In both cases a Ally developed turbulent flow at the inlet section of diffuser is present. The numerical flow simulation in a 2-D computational domain has been performed under the assumption of an axisymmetric flow in the diffuser. Numerically obtained results have been compared with experimental data. Results obtained with these two softwares have also been mutually compared. At the end the results obtained by CFD for the cases of 2-D and 3-D computational domains have been mutually compared, and the advantages and disadvantages of performing numerical simulations under the assumption of an axisymmetric flow in the diffuser have been analyzed.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "Comparison of different cfd software performances in the case of an incompressible air flow through a straight conical diffuser",
pages = "S874-S863",
volume = "21",
doi = "10.2298/TSCI161020329N"
}

Novković, Đ., Burazer, J. M.,& Ćoćić, A.. (2017). Comparison of different cfd software performances in the case of an incompressible air flow through a straight conical diffuser. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 21, S863-S874.
https://doi.org/10.2298/TSCI161020329N

Novković Đ, Burazer JM, Ćoćić A. Comparison of different cfd software performances in the case of an incompressible air flow through a straight conical diffuser. in Thermal Science. 2017;21:S863-S874.
doi:10.2298/TSCI161020329N .

Novković, Đorđe , Burazer, Jela M., Ćoćić, Aleksandar, "Comparison of different cfd software performances in the case of an incompressible air flow through a straight conical diffuser" in Thermal Science, 21 (2017):S863-S874,
https://doi.org/10.2298/TSCI161020329N . .

TY  - CHAP
AU  - Novković, Đorđe 
AU  - Lečić, Milan
AU  - Burazer, Jela
AU  - Radenković, Darko
PY  - 2015
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5587
PB  - University of Belgrade, Faculty of Mechanical Engineering, Belgrade, Serbia
T2  - Turbulence workshop - International symposium, University of Belgrade, Faculty of Mechanical Engineering, Book of Abstracts, Belgrade
T1  - Numerical flow simulation in the Agnew micro hydro turbine
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5587
ER  - 

@inbook{
author = "Novković, Đorđe  and Lečić, Milan and Burazer, Jela and Radenković, Darko",
year = "2015",
publisher = "University of Belgrade, Faculty of Mechanical Engineering, Belgrade, Serbia",
journal = "Turbulence workshop - International symposium, University of Belgrade, Faculty of Mechanical Engineering, Book of Abstracts, Belgrade",
booktitle = "Numerical flow simulation in the Agnew micro hydro turbine",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5587"
}

Novković, Đ., Lečić, M., Burazer, J.,& Radenković, D.. (2015). Numerical flow simulation in the Agnew micro hydro turbine. in Turbulence workshop - International symposium, University of Belgrade, Faculty of Mechanical Engineering, Book of Abstracts, Belgrade
University of Belgrade, Faculty of Mechanical Engineering, Belgrade, Serbia..
https://hdl.handle.net/21.15107/rcub_machinery_5587

Novković Đ, Lečić M, Burazer J, Radenković D. Numerical flow simulation in the Agnew micro hydro turbine. in Turbulence workshop - International symposium, University of Belgrade, Faculty of Mechanical Engineering, Book of Abstracts, Belgrade. 2015;.
https://hdl.handle.net/21.15107/rcub_machinery_5587 .

Novković, Đorđe , Lečić, Milan, Burazer, Jela, Radenković, Darko, "Numerical flow simulation in the Agnew micro hydro turbine" in Turbulence workshop - International symposium, University of Belgrade, Faculty of Mechanical Engineering, Book of Abstracts, Belgrade (2015),
https://hdl.handle.net/21.15107/rcub_machinery_5587 .

TY  - CONF
AU  - Novković, Đorđe 
AU  - Maričić, Nikola
AU  - Jevtić, Miroljub
PY  - 2015
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5582
PB  - Savez energetičara, Beograd
C3  - Energija, ekonomija, ekologija - Energetika 2014, XXXI Međunarodno savetovanje
T1  - Numerička simulacija strujanja u turbini Francis-99
T1  - Numerical Flow Simulation in the Francis-99 Turbine
IS  - 1-2
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5582
ER  - 

@conference{
author = "Novković, Đorđe  and Maričić, Nikola and Jevtić, Miroljub",
year = "2015",
publisher = "Savez energetičara, Beograd",
journal = "Energija, ekonomija, ekologija - Energetika 2014, XXXI Međunarodno savetovanje",
title = "Numerička simulacija strujanja u turbini Francis-99, Numerical Flow Simulation in the Francis-99 Turbine",
number = "1-2",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5582"
}

Novković, Đ., Maričić, N.,& Jevtić, M.. (2015). Numerička simulacija strujanja u turbini Francis-99. in Energija, ekonomija, ekologija - Energetika 2014, XXXI Međunarodno savetovanje
Savez energetičara, Beograd.(1-2).
https://hdl.handle.net/21.15107/rcub_machinery_5582

Novković Đ, Maričić N, Jevtić M. Numerička simulacija strujanja u turbini Francis-99. in Energija, ekonomija, ekologija - Energetika 2014, XXXI Međunarodno savetovanje. 2015;(1-2).
https://hdl.handle.net/21.15107/rcub_machinery_5582 .

Novković, Đorđe , Maričić, Nikola, Jevtić, Miroljub, "Numerička simulacija strujanja u turbini Francis-99" in Energija, ekonomija, ekologija - Energetika 2014, XXXI Međunarodno savetovanje, no. 1-2 (2015),
https://hdl.handle.net/21.15107/rcub_machinery_5582 .

TY  - JOUR
AU  - Novković, Đorđe 
AU  - Lečić, Milan
AU  - Burazer, Jela M.
AU  - Radenković, Darko
PY  - 2014
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2050
AB  - U radu su urađene numeričke simulacije strujanja u maloj cevnoj turbini primenom softvera Ansys CFX. Simulacije su izvedene primenom tri različita modela turbulencije koji su bazirani na Rejnoldsovom osrednjavanju Navije-Stoksovih jednačina: k-ε , k-ω i SST. Za svaki od navedenih modela razmotreno je sedam različitih radnih režima turbine. Da bi se smanjilo korišćenje računarskih resursa izvedene su stacionarne simulacije strujanja. Za sve slučajeve dobijena je dobra numerička stabilnost i konvergencija rešenja. Radne krive turbine formirane su za svaki od izabranih modela turbulencije na osnovu rezultata izvedenih simulacija u različitim radnim režimima. Za optimalni radni režim turbine, u proizvoljno izabranom poprečnom preseku difuzora izračunati su profili brzina za svaki model turbulencije, kao i raspodela statičkog pritiska po konturama loptatica radnog kola turbine. Izvršeno je upoređivanje dobijenih performansi turbine i data je analiza dobijenih profila brzine i raspodele statičkog pritiska za izabrane modele turbulencije.
AB  - Numerical flow simulations in a small bulb turbine by the use of Ansys CFX software were performed in this paper. Simulations were performed for three different RANS-based models: k-ε , k-ω and SST. For each of these models, seven different operating regimes were considered. In order to reduce computational effort, steady state simulations were performed. In all cases, good numerical stability and convergence of solution were obtained. Based on the obtained results, performance curves for each of selected turbulence models in different operating regimes are formed. In turbine's optimal operating regime, velocity profiles in a selected cross section of the draft tube were calculated, as well as the static pressure distribution on runner blades. Comparison of obtained performance curves was performed. Analysis of the velocity profiles and distribution of static pressure are given for each of the selected turbulence model.
PB  - Univerzitet u Beogradu - Mašinski fakultet, Beograd
T2  - FME Transactions
T1  - Simulacije strujanja u maloj cevnoj turbini primenom dvojednačinskih modela turbulencije
T1  - Flow simulations in a small bulb turbine using two-equation turbulence models
EP  - 127
IS  - 2
SP  - 118
VL  - 42
DO  - 10.5937/fmet1402118N
ER  - 

@article{
author = "Novković, Đorđe  and Lečić, Milan and Burazer, Jela M. and Radenković, Darko",
year = "2014",
abstract = "U radu su urađene numeričke simulacije strujanja u maloj cevnoj turbini primenom softvera Ansys CFX. Simulacije su izvedene primenom tri različita modela turbulencije koji su bazirani na Rejnoldsovom osrednjavanju Navije-Stoksovih jednačina: k-ε , k-ω i SST. Za svaki od navedenih modela razmotreno je sedam različitih radnih režima turbine. Da bi se smanjilo korišćenje računarskih resursa izvedene su stacionarne simulacije strujanja. Za sve slučajeve dobijena je dobra numerička stabilnost i konvergencija rešenja. Radne krive turbine formirane su za svaki od izabranih modela turbulencije na osnovu rezultata izvedenih simulacija u različitim radnim režimima. Za optimalni radni režim turbine, u proizvoljno izabranom poprečnom preseku difuzora izračunati su profili brzina za svaki model turbulencije, kao i raspodela statičkog pritiska po konturama loptatica radnog kola turbine. Izvršeno je upoređivanje dobijenih performansi turbine i data je analiza dobijenih profila brzine i raspodele statičkog pritiska za izabrane modele turbulencije., Numerical flow simulations in a small bulb turbine by the use of Ansys CFX software were performed in this paper. Simulations were performed for three different RANS-based models: k-ε , k-ω and SST. For each of these models, seven different operating regimes were considered. In order to reduce computational effort, steady state simulations were performed. In all cases, good numerical stability and convergence of solution were obtained. Based on the obtained results, performance curves for each of selected turbulence models in different operating regimes are formed. In turbine's optimal operating regime, velocity profiles in a selected cross section of the draft tube were calculated, as well as the static pressure distribution on runner blades. Comparison of obtained performance curves was performed. Analysis of the velocity profiles and distribution of static pressure are given for each of the selected turbulence model.",
publisher = "Univerzitet u Beogradu - Mašinski fakultet, Beograd",
journal = "FME Transactions",
title = "Simulacije strujanja u maloj cevnoj turbini primenom dvojednačinskih modela turbulencije, Flow simulations in a small bulb turbine using two-equation turbulence models",
pages = "127-118",
number = "2",
volume = "42",
doi = "10.5937/fmet1402118N"
}

Novković, Đ., Lečić, M., Burazer, J. M.,& Radenković, D.. (2014). Simulacije strujanja u maloj cevnoj turbini primenom dvojednačinskih modela turbulencije. in FME Transactions
Univerzitet u Beogradu - Mašinski fakultet, Beograd., 42(2), 118-127.
https://doi.org/10.5937/fmet1402118N

Novković Đ, Lečić M, Burazer JM, Radenković D. Simulacije strujanja u maloj cevnoj turbini primenom dvojednačinskih modela turbulencije. in FME Transactions. 2014;42(2):118-127.
doi:10.5937/fmet1402118N .

Novković, Đorđe , Lečić, Milan, Burazer, Jela M., Radenković, Darko, "Simulacije strujanja u maloj cevnoj turbini primenom dvojednačinskih modela turbulencije" in FME Transactions, 42, no. 2 (2014):118-127,
https://doi.org/10.5937/fmet1402118N . .

TY  - JOUR
AU  - Radenković, Darko
AU  - Burazer, Jela M.
AU  - Novković, Đorđe 
PY  - 2014
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1945
AB  - U radu su primenjene dve vrste invarijantnih mapa kako bi se procenio stepen anizotropnosti turbulentnog vihornog strujanja. Korišćene su invarijantna mapa, koju su predložili Lamli i Njuman, kao i baricentrična mapa. Analizirane su razlike u vizuelnom predstavljanju stanja anizotropnosti i izvedene su matematičke osnove za obe mape. Analizom eksperimentalnih podataka je pokazano da postoji značajan uticaj vihora na anizotropnost turbulencije. Korišćenje mapa anizotropnosti pokazuje da su različite oblasti strujnog polja u vihornom strujanju okarakterisane različitim stanjima anizotropnosti.
AB  - Anisotropy invariant map proposed by Lumley and Newman and barycentric map proposed by Banerjee et al. were used in order to estimate the degree of anisotropy in turbulent swirl flow. The differences in visual interpretations of anisotropy states in these two maps were analyzed and mathematical basis of these two maps was derived. Experimental data reveal that there is significant influence of swirl on the anisotropy of turbulence. Anisotropy invariant mapping shows that different flow regions of swirl flow are characterized by different anisotropy states.
PB  - Univerzitet u Beogradu - Mašinski fakultet, Beograd
T2  - FME Transactions
T1  - Analiza anizotropnosti turbulentnog vihornog strujanja
T1  - Anisotropy analysis of turbulent swirl flow
EP  - 25
IS  - 1
SP  - 19
VL  - 42
DO  - 10.5937/fmet1401019R
ER  - 

@article{
author = "Radenković, Darko and Burazer, Jela M. and Novković, Đorđe ",
year = "2014",
abstract = "U radu su primenjene dve vrste invarijantnih mapa kako bi se procenio stepen anizotropnosti turbulentnog vihornog strujanja. Korišćene su invarijantna mapa, koju su predložili Lamli i Njuman, kao i baricentrična mapa. Analizirane su razlike u vizuelnom predstavljanju stanja anizotropnosti i izvedene su matematičke osnove za obe mape. Analizom eksperimentalnih podataka je pokazano da postoji značajan uticaj vihora na anizotropnost turbulencije. Korišćenje mapa anizotropnosti pokazuje da su različite oblasti strujnog polja u vihornom strujanju okarakterisane različitim stanjima anizotropnosti., Anisotropy invariant map proposed by Lumley and Newman and barycentric map proposed by Banerjee et al. were used in order to estimate the degree of anisotropy in turbulent swirl flow. The differences in visual interpretations of anisotropy states in these two maps were analyzed and mathematical basis of these two maps was derived. Experimental data reveal that there is significant influence of swirl on the anisotropy of turbulence. Anisotropy invariant mapping shows that different flow regions of swirl flow are characterized by different anisotropy states.",
publisher = "Univerzitet u Beogradu - Mašinski fakultet, Beograd",
journal = "FME Transactions",
title = "Analiza anizotropnosti turbulentnog vihornog strujanja, Anisotropy analysis of turbulent swirl flow",
pages = "25-19",
number = "1",
volume = "42",
doi = "10.5937/fmet1401019R"
}

Radenković, D., Burazer, J. M.,& Novković, Đ.. (2014). Analiza anizotropnosti turbulentnog vihornog strujanja. in FME Transactions
Univerzitet u Beogradu - Mašinski fakultet, Beograd., 42(1), 19-25.
https://doi.org/10.5937/fmet1401019R

Radenković D, Burazer JM, Novković Đ. Analiza anizotropnosti turbulentnog vihornog strujanja. in FME Transactions. 2014;42(1):19-25.
doi:10.5937/fmet1401019R .

Radenković, Darko, Burazer, Jela M., Novković, Đorđe , "Analiza anizotropnosti turbulentnog vihornog strujanja" in FME Transactions, 42, no. 1 (2014):19-25,
https://doi.org/10.5937/fmet1401019R . .

TY  - CONF
AU  - Novković, Đorđe 
AU  - Maričić, Nikola
AU  - Jevtić, Miroljub
PY  - 2014
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5584
PB  - University of Belgrade, Technical Faculty in Bor, Engineering Managment Department
C3  - 4th International Symposium on Environmental and Material Flow Managment - EMFM14
T1  - Improvement of Pico Hydropower Plant on the Radovanska River
EP  - 38
SP  - 32
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5584
ER  - 

@conference{
author = "Novković, Đorđe  and Maričić, Nikola and Jevtić, Miroljub",
year = "2014",
publisher = "University of Belgrade, Technical Faculty in Bor, Engineering Managment Department",
journal = "4th International Symposium on Environmental and Material Flow Managment - EMFM14",
title = "Improvement of Pico Hydropower Plant on the Radovanska River",
pages = "38-32",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5584"
}

Novković, Đ., Maričić, N.,& Jevtić, M.. (2014). Improvement of Pico Hydropower Plant on the Radovanska River. in 4th International Symposium on Environmental and Material Flow Managment - EMFM14
University of Belgrade, Technical Faculty in Bor, Engineering Managment Department., 32-38.
https://hdl.handle.net/21.15107/rcub_machinery_5584

Novković Đ, Maričić N, Jevtić M. Improvement of Pico Hydropower Plant on the Radovanska River. in 4th International Symposium on Environmental and Material Flow Managment - EMFM14. 2014;:32-38.
https://hdl.handle.net/21.15107/rcub_machinery_5584 .

Novković, Đorđe , Maričić, Nikola, Jevtić, Miroljub, "Improvement of Pico Hydropower Plant on the Radovanska River" in 4th International Symposium on Environmental and Material Flow Managment - EMFM14 (2014):32-38,
https://hdl.handle.net/21.15107/rcub_machinery_5584 .

TY  - CONF
AU  - Novković, Đorđe 
AU  - Maričić, Nikola
AU  - Jevtić, Miroljub
PY  - 2014
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5581
C3  - Energija, ekonomija, ekologija - Energetika 2014, XXX Međunarodno savetovanje
T1  - Uticaj promene broja obrtaja radnog kola na regulaciju male cevne turbine sa podešavajućim sprovodnim aparatom
T1  - The Impact of Change Impeller Speed on Regulation of Small Bulb Turbine with Adjustable Guide Vanes
EP  - 376
IS  - 1-2
SP  - 369
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5581
ER  - 

@conference{
author = "Novković, Đorđe  and Maričić, Nikola and Jevtić, Miroljub",
year = "2014",
journal = "Energija, ekonomija, ekologija - Energetika 2014, XXX Međunarodno savetovanje",
title = "Uticaj promene broja obrtaja radnog kola na regulaciju male cevne turbine sa podešavajućim sprovodnim aparatom, The Impact of Change Impeller Speed on Regulation of Small Bulb Turbine with Adjustable Guide Vanes",
pages = "376-369",
number = "1-2",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5581"
}

Novković, Đ., Maričić, N.,& Jevtić, M.. (2014). Uticaj promene broja obrtaja radnog kola na regulaciju male cevne turbine sa podešavajućim sprovodnim aparatom. in Energija, ekonomija, ekologija - Energetika 2014, XXX Međunarodno savetovanje(1-2), 369-376.
https://hdl.handle.net/21.15107/rcub_machinery_5581

Novković Đ, Maričić N, Jevtić M. Uticaj promene broja obrtaja radnog kola na regulaciju male cevne turbine sa podešavajućim sprovodnim aparatom. in Energija, ekonomija, ekologija - Energetika 2014, XXX Međunarodno savetovanje. 2014;(1-2):369-376.
https://hdl.handle.net/21.15107/rcub_machinery_5581 .

Novković, Đorđe , Maričić, Nikola, Jevtić, Miroljub, "Uticaj promene broja obrtaja radnog kola na regulaciju male cevne turbine sa podešavajućim sprovodnim aparatom" in Energija, ekonomija, ekologija - Energetika 2014, XXX Međunarodno savetovanje, no. 1-2 (2014):369-376,
https://hdl.handle.net/21.15107/rcub_machinery_5581 .

TY  - CONF
AU  - Novković, Đorđe 
AU  - Maričić, Nikola
AU  - Jevtić, Miroljub
AU  - Glavčić, Zoran
PY  - 2013
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5580
PB  - Savez energetičara, Beograd
C3  - Energija, ekonomija, ekologija - Energetika 2013, XXIX Međunarodno savetovanje
T1  - Poboljšanje performansi male cevne turbine primenom računarske mehanike fluida
T1  - Improving small bulb turbine performances using CFD
EP  - 316
IS  - 3-4
SP  - 309
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5580
ER  - 

@conference{
author = "Novković, Đorđe  and Maričić, Nikola and Jevtić, Miroljub and Glavčić, Zoran",
year = "2013",
publisher = "Savez energetičara, Beograd",
journal = "Energija, ekonomija, ekologija - Energetika 2013, XXIX Međunarodno savetovanje",
title = "Poboljšanje performansi male cevne turbine primenom računarske mehanike fluida, Improving small bulb turbine performances using CFD",
pages = "316-309",
number = "3-4",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5580"
}

Novković, Đ., Maričić, N., Jevtić, M.,& Glavčić, Z.. (2013). Poboljšanje performansi male cevne turbine primenom računarske mehanike fluida. in Energija, ekonomija, ekologija - Energetika 2013, XXIX Međunarodno savetovanje
Savez energetičara, Beograd.(3-4), 309-316.
https://hdl.handle.net/21.15107/rcub_machinery_5580

Novković Đ, Maričić N, Jevtić M, Glavčić Z. Poboljšanje performansi male cevne turbine primenom računarske mehanike fluida. in Energija, ekonomija, ekologija - Energetika 2013, XXIX Međunarodno savetovanje. 2013;(3-4):309-316.
https://hdl.handle.net/21.15107/rcub_machinery_5580 .

Novković, Đorđe , Maričić, Nikola, Jevtić, Miroljub, Glavčić, Zoran, "Poboljšanje performansi male cevne turbine primenom računarske mehanike fluida" in Energija, ekonomija, ekologija - Energetika 2013, XXIX Međunarodno savetovanje, no. 3-4 (2013):309-316,
https://hdl.handle.net/21.15107/rcub_machinery_5580 .

TY  - CONF
AU  - Novković, Đorđe 
AU  - Maričić, Nikola
AU  - Glavčić, Zoran
PY  - 2013
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5577
PB  - Serbian Society of Mechanics, Belgrade
C3  - IV International Congress of Serbian Society of Mechanics, Proceedings, 449-454
T1  - CFD Simulations in Small Bulb Turbine with Adjustable Runner Blades
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5577
ER  - 

@conference{
author = "Novković, Đorđe  and Maričić, Nikola and Glavčić, Zoran",
year = "2013",
publisher = "Serbian Society of Mechanics, Belgrade",
journal = "IV International Congress of Serbian Society of Mechanics, Proceedings, 449-454",
title = "CFD Simulations in Small Bulb Turbine with Adjustable Runner Blades",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5577"
}

Novković, Đ., Maričić, N.,& Glavčić, Z.. (2013). CFD Simulations in Small Bulb Turbine with Adjustable Runner Blades. in IV International Congress of Serbian Society of Mechanics, Proceedings, 449-454
Serbian Society of Mechanics, Belgrade..
https://hdl.handle.net/21.15107/rcub_machinery_5577

Novković Đ, Maričić N, Glavčić Z. CFD Simulations in Small Bulb Turbine with Adjustable Runner Blades. in IV International Congress of Serbian Society of Mechanics, Proceedings, 449-454. 2013;.
https://hdl.handle.net/21.15107/rcub_machinery_5577 .

Novković, Đorđe , Maričić, Nikola, Glavčić, Zoran, "CFD Simulations in Small Bulb Turbine with Adjustable Runner Blades" in IV International Congress of Serbian Society of Mechanics, Proceedings, 449-454 (2013),
https://hdl.handle.net/21.15107/rcub_machinery_5577 .

TY  - CONF
AU  - Maričić, Nikola
AU  - Novković, Đorđe 
AU  - Marković, Đurica
AU  - Arsić, Nebojša
AU  - Anđelković, Ljiljana
PY  - 2012
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5579
PB  - Savez energetičara, Beograd
C3  - Energija, ekonomija, ekologija - Energetika 2012, XXVIII Međunarodno savetovanje
T1  - Predlog obnavljanja mini hidroelektrane na Čečevskoj reci
T1  - Rebuild Proposal to Mini Hydro Power Plant on the River Čečevo
EP  - 246
IS  - 1-2
SP  - 241
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5579
ER  - 

@conference{
author = "Maričić, Nikola and Novković, Đorđe  and Marković, Đurica and Arsić, Nebojša and Anđelković, Ljiljana",
year = "2012",
publisher = "Savez energetičara, Beograd",
journal = "Energija, ekonomija, ekologija - Energetika 2012, XXVIII Međunarodno savetovanje",
title = "Predlog obnavljanja mini hidroelektrane na Čečevskoj reci, Rebuild Proposal to Mini Hydro Power Plant on the River Čečevo",
pages = "246-241",
number = "1-2",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5579"
}

Maričić, N., Novković, Đ., Marković, Đ., Arsić, N.,& Anđelković, L.. (2012). Predlog obnavljanja mini hidroelektrane na Čečevskoj reci. in Energija, ekonomija, ekologija - Energetika 2012, XXVIII Međunarodno savetovanje
Savez energetičara, Beograd.(1-2), 241-246.
https://hdl.handle.net/21.15107/rcub_machinery_5579

Maričić N, Novković Đ, Marković Đ, Arsić N, Anđelković L. Predlog obnavljanja mini hidroelektrane na Čečevskoj reci. in Energija, ekonomija, ekologija - Energetika 2012, XXVIII Međunarodno savetovanje. 2012;(1-2):241-246.
https://hdl.handle.net/21.15107/rcub_machinery_5579 .

Maričić, Nikola, Novković, Đorđe , Marković, Đurica, Arsić, Nebojša, Anđelković, Ljiljana, "Predlog obnavljanja mini hidroelektrane na Čečevskoj reci" in Energija, ekonomija, ekologija - Energetika 2012, XXVIII Međunarodno savetovanje, no. 1-2 (2012):241-246,
https://hdl.handle.net/21.15107/rcub_machinery_5579 .

TY  - CONF
AU  - Novković, Đorđe 
AU  - Maričić, Nikola
AU  - Miroljub, Jevtić
PY  - 2012
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5578
PB  - Savez energetičara, Beograd
C3  - Energija, ekonomija, ekologija - Energetika 2012, XXVIII Međunarodno savetovanje
T1  - Simulacija strujanja u propelernoj turbini primenom računarske mehanike fluida
T1  - Flow Simulation in Propeller Turbine using CFD
EP  - 239
IS  - 1-2
SP  - 233
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5578
ER  - 

@conference{
author = "Novković, Đorđe  and Maričić, Nikola and Miroljub, Jevtić",
year = "2012",
publisher = "Savez energetičara, Beograd",
journal = "Energija, ekonomija, ekologija - Energetika 2012, XXVIII Međunarodno savetovanje",
title = "Simulacija strujanja u propelernoj turbini primenom računarske mehanike fluida, Flow Simulation in Propeller Turbine using CFD",
pages = "239-233",
number = "1-2",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5578"
}

Novković, Đ., Maričić, N.,& Miroljub, J.. (2012). Simulacija strujanja u propelernoj turbini primenom računarske mehanike fluida. in Energija, ekonomija, ekologija - Energetika 2012, XXVIII Međunarodno savetovanje
Savez energetičara, Beograd.(1-2), 233-239.
https://hdl.handle.net/21.15107/rcub_machinery_5578

Novković Đ, Maričić N, Miroljub J. Simulacija strujanja u propelernoj turbini primenom računarske mehanike fluida. in Energija, ekonomija, ekologija - Energetika 2012, XXVIII Međunarodno savetovanje. 2012;(1-2):233-239.
https://hdl.handle.net/21.15107/rcub_machinery_5578 .

Novković, Đorđe , Maričić, Nikola, Miroljub, Jevtić, "Simulacija strujanja u propelernoj turbini primenom računarske mehanike fluida" in Energija, ekonomija, ekologija - Energetika 2012, XXVIII Međunarodno savetovanje, no. 1-2 (2012):233-239,
https://hdl.handle.net/21.15107/rcub_machinery_5578 .