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  - JOUR
AU  - Mitrović, Časlav
AU  - Vorotović, Goran
AU  - Crnogorac, D
AU  - Matović, M
AU  - Burazer, Jela
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6235
T2  - International Journal for Traffic and Transport Engineering
T1  - Experimental determination of aerodynamic characteristics of lift and drag in the wind tunnel of aircraft B787 using the „force balance“ method
EP  - 433
IS  - 3
SP  - 419
VL  - 12
DO  - 10.7708/ijtte2022.12(3).10
ER  - 

@article{
author = "Mitrović, Časlav and Vorotović, Goran and Crnogorac, D and Matović, M and Burazer, Jela",
year = "2022",
journal = "International Journal for Traffic and Transport Engineering",
title = "Experimental determination of aerodynamic characteristics of lift and drag in the wind tunnel of aircraft B787 using the „force balance“ method",
pages = "433-419",
number = "3",
volume = "12",
doi = "10.7708/ijtte2022.12(3).10"
}

Mitrović, Č., Vorotović, G., Crnogorac, D., Matović, M.,& Burazer, J.. (2022). Experimental determination of aerodynamic characteristics of lift and drag in the wind tunnel of aircraft B787 using the „force balance“ method. in International Journal for Traffic and Transport Engineering, 12(3), 419-433.
https://doi.org/10.7708/ijtte2022.12(3).10

Mitrović Č, Vorotović G, Crnogorac D, Matović M, Burazer J. Experimental determination of aerodynamic characteristics of lift and drag in the wind tunnel of aircraft B787 using the „force balance“ method. in International Journal for Traffic and Transport Engineering. 2022;12(3):419-433.
doi:10.7708/ijtte2022.12(3).10 .

Mitrović, Časlav, Vorotović, Goran, Crnogorac, D, Matović, M, Burazer, Jela, "Experimental determination of aerodynamic characteristics of lift and drag in the wind tunnel of aircraft B787 using the „force balance“ method" in International Journal for Traffic and Transport Engineering, 12, no. 3 (2022):419-433,
https://doi.org/10.7708/ijtte2022.12(3).10 . .

TY  - JOUR
AU  - Skoko, D. M.
AU  - Crnojević, C. D.
AU  - Lečić, Milan
AU  - Ristivojević, Mileta
AU  - Mitrović, Radivoje
AU  - Burazer, Jela M.
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3733
AB  - The present paper studies the impingement of compressible air jet on a flat plate primarily from the aspect of its application in the domain of pneumatic metrology, i.e. in cases of small distance between the jet nozzle exit and the flat plate. Besides this direct application in the area of pneumatic metrology, the distance between the nozzle exit and the flat plate has been considerably increased and the case of a free jet was analysed with a view to compare the results applicable in various domains. This experimental study demonstrates that the structures of a free jet and this special case of an impingement jet are totally different. In the pressure distribution of the impingement jet, pressure discontinuity above the flat plate may occur, which is shown to be the result of low intensity shock waves and transonic flow. The experimental results show that the pneumatic sensitivity of a pneumatic comparator is a function of the supply pressure and the internal orifice diameter, as well as that the impingement air jet is a typical case of non-isentropic flow.
PB  - Springer, New York
T2  - Experimental Techniques
T1  - Some Characteristics of Compressible Air Impingement Jet Applied in Pneumatic Dimensional Control
EP  - 113
IS  - 1
SP  - 103
VL  - 46
DO  - 10.1007/s40799-021-00460-6
ER  - 

@article{
author = "Skoko, D. M. and Crnojević, C. D. and Lečić, Milan and Ristivojević, Mileta and Mitrović, Radivoje and Burazer, Jela M.",
year = "2022",
abstract = "The present paper studies the impingement of compressible air jet on a flat plate primarily from the aspect of its application in the domain of pneumatic metrology, i.e. in cases of small distance between the jet nozzle exit and the flat plate. Besides this direct application in the area of pneumatic metrology, the distance between the nozzle exit and the flat plate has been considerably increased and the case of a free jet was analysed with a view to compare the results applicable in various domains. This experimental study demonstrates that the structures of a free jet and this special case of an impingement jet are totally different. In the pressure distribution of the impingement jet, pressure discontinuity above the flat plate may occur, which is shown to be the result of low intensity shock waves and transonic flow. The experimental results show that the pneumatic sensitivity of a pneumatic comparator is a function of the supply pressure and the internal orifice diameter, as well as that the impingement air jet is a typical case of non-isentropic flow.",
publisher = "Springer, New York",
journal = "Experimental Techniques",
title = "Some Characteristics of Compressible Air Impingement Jet Applied in Pneumatic Dimensional Control",
pages = "113-103",
number = "1",
volume = "46",
doi = "10.1007/s40799-021-00460-6"
}

Skoko, D. M., Crnojević, C. D., Lečić, M., Ristivojević, M., Mitrović, R.,& Burazer, J. M.. (2022). Some Characteristics of Compressible Air Impingement Jet Applied in Pneumatic Dimensional Control. in Experimental Techniques
Springer, New York., 46(1), 103-113.
https://doi.org/10.1007/s40799-021-00460-6

Skoko DM, Crnojević CD, Lečić M, Ristivojević M, Mitrović R, Burazer JM. Some Characteristics of Compressible Air Impingement Jet Applied in Pneumatic Dimensional Control. in Experimental Techniques. 2022;46(1):103-113.
doi:10.1007/s40799-021-00460-6 .

Skoko, D. M., Crnojević, C. D., Lečić, Milan, Ristivojević, Mileta, Mitrović, Radivoje, Burazer, Jela M., "Some Characteristics of Compressible Air Impingement Jet Applied in Pneumatic Dimensional Control" in Experimental Techniques, 46, no. 1 (2022):103-113,
https://doi.org/10.1007/s40799-021-00460-6 . .

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  - JOUR
AU  - Burazer, Jela
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6234
AB  - Energy separation is a spontaneous energy redistribution within a fluid flow. As a consequence, there are places with higher and lower values of total temperature in the fluid flow. It is characteristic for many flow geometries. This paper deals with the energy separation in a cylinder wake. Two flow conditions are being considered-transient and steady-state flow in the wake. Two different solvers from the open source package OpenFOAM are used in order to capture the phenomenon of energy separation. One of these solvers is modified for the purpose of calculation in a particular case of the vortex street flow. The energy equation based on the internal energy present in this solver is replaced by the energy equation written in the form of a total enthalpy. The other solver has been previously tested in the vortex tube flow, and can also capture the energy separation in the steady-state wake flow of the cylinder. In both cylinder wake flow conditions, a two-dimensional computational domain is used. Standard 𝑘���� − 𝜀���� model is used for computations. It is proved that OpenFOAM is capable of capturing the energy separation phenomenon in a proper way in both of the wake flow cases. Good agreement between the experimental results and the ones from computations is obtained in the case of steady-state flow in the wake. Previous research findings are also confirmed in the case of vortex street flow.
T2  - Theoretical and Applied Mechanics
T1  - Energy separation in transient and steady-state flow across the cylinder
EP  - 94
IS  - 1
SP  - 83
VL  - 45
DO  - 10.2298/TAM171130006B
ER  - 

@article{
author = "Burazer, Jela",
year = "2018",
abstract = "Energy separation is a spontaneous energy redistribution within a fluid flow. As a consequence, there are places with higher and lower values of total temperature in the fluid flow. It is characteristic for many flow geometries. This paper deals with the energy separation in a cylinder wake. Two flow conditions are being considered-transient and steady-state flow in the wake. Two different solvers from the open source package OpenFOAM are used in order to capture the phenomenon of energy separation. One of these solvers is modified for the purpose of calculation in a particular case of the vortex street flow. The energy equation based on the internal energy present in this solver is replaced by the energy equation written in the form of a total enthalpy. The other solver has been previously tested in the vortex tube flow, and can also capture the energy separation in the steady-state wake flow of the cylinder. In both cylinder wake flow conditions, a two-dimensional computational domain is used. Standard 𝑘���� − 𝜀���� model is used for computations. It is proved that OpenFOAM is capable of capturing the energy separation phenomenon in a proper way in both of the wake flow cases. Good agreement between the experimental results and the ones from computations is obtained in the case of steady-state flow in the wake. Previous research findings are also confirmed in the case of vortex street flow.",
journal = "Theoretical and Applied Mechanics",
title = "Energy separation in transient and steady-state flow across the cylinder",
pages = "94-83",
number = "1",
volume = "45",
doi = "10.2298/TAM171130006B"
}

Burazer, J.. (2018). Energy separation in transient and steady-state flow across the cylinder. in Theoretical and Applied Mechanics, 45(1), 83-94.
https://doi.org/10.2298/TAM171130006B

Burazer J. Energy separation in transient and steady-state flow across the cylinder. in Theoretical and Applied Mechanics. 2018;45(1):83-94.
doi:10.2298/TAM171130006B .

Burazer, Jela, "Energy separation in transient and steady-state flow across the cylinder" in Theoretical and Applied Mechanics, 45, no. 1 (2018):83-94,
https://doi.org/10.2298/TAM171130006B . .

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  - Lečić, Milan
AU  - Ćoćić, Aleksandar
AU  - Burazer, Jela M.
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2653
AB  - This paper presents results of our own velocity field measurements in a straight pipe swirl flow. These studies were conducted using an originally designed hot wire probe. Due to the specially tailored shape of the probe, it was possible to get four measurement points in the viscous sublayer. The time-averaged velocity field and the statistical moments of the second and third order are calculated based on the measured velocity components. Mathematical and physical interpretations of statistical characteristics and structures of turbulent swirl flow in the time domain are presented. On the basis of these results, deeper insight into turbulent transport processes can be obtained, as well as useful conclusions necessary for turbulent swirl flows modeling.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - An experimental investigation and statistical analysis of turbulent swirl flow in a straight pipe
EP  - S704
SP  - S691
VL  - 21
DO  - 10.2298/TSCI160201191L
ER  - 

@article{
author = "Lečić, Milan and Ćoćić, Aleksandar and Burazer, Jela M.",
year = "2017",
abstract = "This paper presents results of our own velocity field measurements in a straight pipe swirl flow. These studies were conducted using an originally designed hot wire probe. Due to the specially tailored shape of the probe, it was possible to get four measurement points in the viscous sublayer. The time-averaged velocity field and the statistical moments of the second and third order are calculated based on the measured velocity components. Mathematical and physical interpretations of statistical characteristics and structures of turbulent swirl flow in the time domain are presented. On the basis of these results, deeper insight into turbulent transport processes can be obtained, as well as useful conclusions necessary for turbulent swirl flows modeling.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "An experimental investigation and statistical analysis of turbulent swirl flow in a straight pipe",
pages = "S704-S691",
volume = "21",
doi = "10.2298/TSCI160201191L"
}

Lečić, M., Ćoćić, A.,& Burazer, J. M.. (2017). An experimental investigation and statistical analysis of turbulent swirl flow in a straight pipe. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 21, S691-S704.
https://doi.org/10.2298/TSCI160201191L

Lečić M, Ćoćić A, Burazer JM. An experimental investigation and statistical analysis of turbulent swirl flow in a straight pipe. in Thermal Science. 2017;21:S691-S704.
doi:10.2298/TSCI160201191L .

Lečić, Milan, Ćoćić, Aleksandar, Burazer, Jela M., "An experimental investigation and statistical analysis of turbulent swirl flow in a straight pipe" in Thermal Science, 21 (2017):S691-S704,
https://doi.org/10.2298/TSCI160201191L . .

TY  - JOUR
AU  - Burazer, Jela M.
AU  - Ćoćić, Aleksandar
AU  - Lečić, Milan
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2605
AB  - The work presented in this paper is dealing with numerical simulation of energy separation mechanism and flow phenomena within a Ranque-Hilsch vortex tube. Simulation of turbulent, compressible, highly swirling flow inside vortex tube is performed using RANS approach, with Favre averaged conservation equations. For turbulence closure, k-epsilon and k-omega shear-stress transport models are used It is assumed that the mean flow is axisymmetric, so the 2-D computational domain is used. Computations were performed using open-source CFD software Open FOAM All compressible solvers available within OpenFOAM were tested, and it was found that most of the solvers cannot predict energy separation. Code of two chosen solvers, which proved as the most robust, is modified in terms of mean energy equation implementation. Newly created solvers predict physically accepted behavior in vortex tube, with good agreement with experimental results. Comparison between performances of solvers is also presented
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - Numerical research of the compressible flow in a vortex tube using openfoam software
EP  - S758
SP  - S745
VL  - 21
DO  - 10.2298/TSCI160223195B
ER  - 

@article{
author = "Burazer, Jela M. and Ćoćić, Aleksandar and Lečić, Milan",
year = "2017",
abstract = "The work presented in this paper is dealing with numerical simulation of energy separation mechanism and flow phenomena within a Ranque-Hilsch vortex tube. Simulation of turbulent, compressible, highly swirling flow inside vortex tube is performed using RANS approach, with Favre averaged conservation equations. For turbulence closure, k-epsilon and k-omega shear-stress transport models are used It is assumed that the mean flow is axisymmetric, so the 2-D computational domain is used. Computations were performed using open-source CFD software Open FOAM All compressible solvers available within OpenFOAM were tested, and it was found that most of the solvers cannot predict energy separation. Code of two chosen solvers, which proved as the most robust, is modified in terms of mean energy equation implementation. Newly created solvers predict physically accepted behavior in vortex tube, with good agreement with experimental results. Comparison between performances of solvers is also presented",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "Numerical research of the compressible flow in a vortex tube using openfoam software",
pages = "S758-S745",
volume = "21",
doi = "10.2298/TSCI160223195B"
}

Burazer, J. M., Ćoćić, A.,& Lečić, M.. (2017). Numerical research of the compressible flow in a vortex tube using openfoam software. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 21, S745-S758.
https://doi.org/10.2298/TSCI160223195B

Burazer JM, Ćoćić A, Lečić M. Numerical research of the compressible flow in a vortex tube using openfoam software. in Thermal Science. 2017;21:S745-S758.
doi:10.2298/TSCI160223195B .

Burazer, Jela M., Ćoćić, Aleksandar, Lečić, Milan, "Numerical research of the compressible flow in a vortex tube using openfoam software" in Thermal Science, 21 (2017):S745-S758,
https://doi.org/10.2298/TSCI160223195B . .

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  - JOUR
AU  - Jovanović, B.
AU  - Gadjanski, I.
AU  - Burazer, Jela M.
AU  - Nikolić, L.
AU  - Babić, N.
AU  - Lečić, Milan
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2709
AB  - The authors report results of modification performed on the standard, open-source Cartesian style 3D printer and customized hardware (Printrbot Simple Metal) in order to perform paste extrusion with three different materials (hydroxyapatite, clay and chocolate). These results are shown as examples of research and development performed in an informal institution-a fab lab, in connection with formal research institutions. The authors aimed to show how such collaboration of various players in the research community, coupled with multidisciplinary background of participants, produces new and innovative aspects, which is one of the benefits of fab labs.
PB  - Springer Heidelberg
T2  - Lecture Notes in Mechanical Engineering
T1  - R&D in a fab lab: Examples of paste extrusion method
EP  - 467
SP  - 461
DO  - 10.1007/978-3-319-56430-2_35
ER  - 

@article{
author = "Jovanović, B. and Gadjanski, I. and Burazer, Jela M. and Nikolić, L. and Babić, N. and Lečić, Milan",
year = "2017",
abstract = "The authors report results of modification performed on the standard, open-source Cartesian style 3D printer and customized hardware (Printrbot Simple Metal) in order to perform paste extrusion with three different materials (hydroxyapatite, clay and chocolate). These results are shown as examples of research and development performed in an informal institution-a fab lab, in connection with formal research institutions. The authors aimed to show how such collaboration of various players in the research community, coupled with multidisciplinary background of participants, produces new and innovative aspects, which is one of the benefits of fab labs.",
publisher = "Springer Heidelberg",
journal = "Lecture Notes in Mechanical Engineering",
title = "R&D in a fab lab: Examples of paste extrusion method",
pages = "467-461",
doi = "10.1007/978-3-319-56430-2_35"
}

Jovanović, B., Gadjanski, I., Burazer, J. M., Nikolić, L., Babić, N.,& Lečić, M.. (2017). R&D in a fab lab: Examples of paste extrusion method. in Lecture Notes in Mechanical Engineering
Springer Heidelberg., 461-467.
https://doi.org/10.1007/978-3-319-56430-2_35

Jovanović B, Gadjanski I, Burazer JM, Nikolić L, Babić N, Lečić M. R&D in a fab lab: Examples of paste extrusion method. in Lecture Notes in Mechanical Engineering. 2017;:461-467.
doi:10.1007/978-3-319-56430-2_35 .

Jovanović, B., Gadjanski, I., Burazer, Jela M., Nikolić, L., Babić, N., Lečić, Milan, "R&D in a fab lab: Examples of paste extrusion method" in Lecture Notes in Mechanical Engineering (2017):461-467,
https://doi.org/10.1007/978-3-319-56430-2_35 . .

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  - Čolić-Damjanović, Vesna Mila
AU  - Burazer, Jela M.
AU  - Stamenić, Mirjana
AU  - Čantrak, Đorđe
AU  - Lečić, Milan
PY  - 2014
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1928
AB  - This paper discusses the energy saving measures for a residential building in Belgrade, Serbia, by investigating the influences of architectural measures and HVAC systems' measures on its energy performance. The residential building selected for this case study is a high energy consumption house with challenging ventilation requirements, located on a narrow and inclined site with particularly obstructed orientation for its climate zone. Simultaneously, this paper accentuates inaccuracies of energy efficiency regulations in Serbia that merely monitor energy consumption for heating and not at all for ventilation. The PHPP2007 software of the Passive House Institute, Darmstadt, Germany, was used in this research for the reason that it operates with the entirety of energy consumption measures. It allowed demonstrating the results of systematic computer simulations and energy performance studies conducted for a period of one year for the residential building selected and in climate conditions of the Belgrade region.
PB  - Institute of Electrical and Electronics Engineers Inc.
C3  - 3rd International Symposium on Environment Friendly Energies and Applications, EFEA 2014
T1  - Architectural Design Influences and HVAC Systems' Measures on Energy Savings of a High Energy Demand Residential Building
DO  - 10.1109/EFEA.2014.7059986
ER  - 

@conference{
author = "Čolić-Damjanović, Vesna Mila and Burazer, Jela M. and Stamenić, Mirjana and Čantrak, Đorđe and Lečić, Milan",
year = "2014",
abstract = "This paper discusses the energy saving measures for a residential building in Belgrade, Serbia, by investigating the influences of architectural measures and HVAC systems' measures on its energy performance. The residential building selected for this case study is a high energy consumption house with challenging ventilation requirements, located on a narrow and inclined site with particularly obstructed orientation for its climate zone. Simultaneously, this paper accentuates inaccuracies of energy efficiency regulations in Serbia that merely monitor energy consumption for heating and not at all for ventilation. The PHPP2007 software of the Passive House Institute, Darmstadt, Germany, was used in this research for the reason that it operates with the entirety of energy consumption measures. It allowed demonstrating the results of systematic computer simulations and energy performance studies conducted for a period of one year for the residential building selected and in climate conditions of the Belgrade region.",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
journal = "3rd International Symposium on Environment Friendly Energies and Applications, EFEA 2014",
title = "Architectural Design Influences and HVAC Systems' Measures on Energy Savings of a High Energy Demand Residential Building",
doi = "10.1109/EFEA.2014.7059986"
}

Čolić-Damjanović, V. M., Burazer, J. M., Stamenić, M., Čantrak, Đ.,& Lečić, M.. (2014). Architectural Design Influences and HVAC Systems' Measures on Energy Savings of a High Energy Demand Residential Building. in 3rd International Symposium on Environment Friendly Energies and Applications, EFEA 2014
Institute of Electrical and Electronics Engineers Inc...
https://doi.org/10.1109/EFEA.2014.7059986

Čolić-Damjanović VM, Burazer JM, Stamenić M, Čantrak Đ, Lečić M. Architectural Design Influences and HVAC Systems' Measures on Energy Savings of a High Energy Demand Residential Building. in 3rd International Symposium on Environment Friendly Energies and Applications, EFEA 2014. 2014;.
doi:10.1109/EFEA.2014.7059986 .

Čolić-Damjanović, Vesna Mila, Burazer, Jela M., Stamenić, Mirjana, Čantrak, Đorđe, Lečić, Milan, "Architectural Design Influences and HVAC Systems' Measures on Energy Savings of a High Energy Demand Residential Building" in 3rd International Symposium on Environment Friendly Energies and Applications, EFEA 2014 (2014),
https://doi.org/10.1109/EFEA.2014.7059986 . .

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  - JOUR
AU  - Burazer, Jela
AU  - Lečić, Milan
AU  - Dobrnjac, Mirko
PY  - 2014
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6107
T2  - ANNALS of Faculty of Engineering Hunedoara - International Journal of Engineering
T1  - Parametric analysis of vertical pneumatic conveying system performance
VL  - XII
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6107
ER  - 

@article{
author = "Burazer, Jela and Lečić, Milan and Dobrnjac, Mirko",
year = "2014",
journal = "ANNALS of Faculty of Engineering Hunedoara - International Journal of Engineering",
title = "Parametric analysis of vertical pneumatic conveying system performance",
volume = "XII",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6107"
}

Burazer, J., Lečić, M.,& Dobrnjac, M.. (2014). Parametric analysis of vertical pneumatic conveying system performance. in ANNALS of Faculty of Engineering Hunedoara - International Journal of Engineering, XII.
https://hdl.handle.net/21.15107/rcub_machinery_6107

Burazer J, Lečić M, Dobrnjac M. Parametric analysis of vertical pneumatic conveying system performance. in ANNALS of Faculty of Engineering Hunedoara - International Journal of Engineering. 2014;XII.
https://hdl.handle.net/21.15107/rcub_machinery_6107 .

Burazer, Jela, Lečić, Milan, Dobrnjac, Mirko, "Parametric analysis of vertical pneumatic conveying system performance" in ANNALS of Faculty of Engineering Hunedoara - International Journal of Engineering, XII (2014),
https://hdl.handle.net/21.15107/rcub_machinery_6107 .

TY  - COMP
AU  - Gojak, Milan
AU  - Dudić, Dragana
AU  - Zlatanović, Ivan
AU  - Gligorević, Kosta
AU  - Urošević, Tijana
AU  - Rudonja, Nedžad
AU  - Burazer, Jela
AU  - Saljnjikov, Aleksandar
PY  - 2013
UR  - http://solar.mas.bg.ac.rs
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5404
AB  - Техничко решење представља софтвер за филтрирање, обраду и визуелизацију
прикупљених метеоролошких података.  Ово техничко решење припада области машинства, односно научној области термотехника – примењена термомеханика, дефинисана као матичном области Машинског факултета Универзитета у Београду. 
Класификацијом Националног савета за научни и технолошки развој Републике
Србије, представљеном у Правилнику о поступку и начину вредновања и
квантитативном исказивању научноистраживачких резултата истраживача од 21. марта
2008. године, ово техничко решење се третира као резултат са ознаком М85 – нови
софтвер.
PB  - University of Belgrade, Faculty of Mechanical engineering, Belgrade
T2  - http://solar.mas.bg.ac.rs
T1  - Софтвер за филтрирање, обраду и визуелизацију прикупљених метеоролошких података
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5404
ER  - 

@misc{
author = "Gojak, Milan and Dudić, Dragana and Zlatanović, Ivan and Gligorević, Kosta and Urošević, Tijana and Rudonja, Nedžad and Burazer, Jela and Saljnjikov, Aleksandar",
year = "2013",
abstract = "Техничко решење представља софтвер за филтрирање, обраду и визуелизацију
прикупљених метеоролошких података.  Ово техничко решење припада области машинства, односно научној области термотехника – примењена термомеханика, дефинисана као матичном области Машинског факултета Универзитета у Београду. 
Класификацијом Националног савета за научни и технолошки развој Републике
Србије, представљеном у Правилнику о поступку и начину вредновања и
квантитативном исказивању научноистраживачких резултата истраживача од 21. марта
2008. године, ово техничко решење се третира као резултат са ознаком М85 – нови
софтвер.",
publisher = "University of Belgrade, Faculty of Mechanical engineering, Belgrade",
journal = "http://solar.mas.bg.ac.rs",
title = "Софтвер за филтрирање, обраду и визуелизацију прикупљених метеоролошких података",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5404"
}

Gojak, M., Dudić, D., Zlatanović, I., Gligorević, K., Urošević, T., Rudonja, N., Burazer, J.,& Saljnjikov, A.. (2013). Софтвер за филтрирање, обраду и визуелизацију прикупљених метеоролошких података. in http://solar.mas.bg.ac.rs
University of Belgrade, Faculty of Mechanical engineering, Belgrade..
https://hdl.handle.net/21.15107/rcub_machinery_5404

Gojak M, Dudić D, Zlatanović I, Gligorević K, Urošević T, Rudonja N, Burazer J, Saljnjikov A. Софтвер за филтрирање, обраду и визуелизацију прикупљених метеоролошких података. in http://solar.mas.bg.ac.rs. 2013;.
https://hdl.handle.net/21.15107/rcub_machinery_5404 .

Gojak, Milan, Dudić, Dragana, Zlatanović, Ivan, Gligorević, Kosta, Urošević, Tijana, Rudonja, Nedžad, Burazer, Jela, Saljnjikov, Aleksandar, "Софтвер за филтрирање, обраду и визуелизацију прикупљених метеоролошких података" in http://solar.mas.bg.ac.rs (2013),
https://hdl.handle.net/21.15107/rcub_machinery_5404 .

TY  - JOUR
AU  - Burazer, Jela M.
AU  - Lečić, Milan
AU  - Čantrak, Svetislav
PY  - 2012
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1584
AB  - Istraživanje strukture turbulencije je neophodno za razumevanje fizike strujno-termodinamičkih procesa u KGH sistemima. Analiza i proračun ovih sistema zasnovani su na poznavanju turbulentnog prenosa i njegovom modeliranju. S tim u vezi, u radu se analiziraju fenomeni nelokalnog prenosa impulsa i nelokalnog prenosa energije toplotom u zakrivljenim kanalima, asimetričnim mlazevima, vrtložnim tragovima i vihornom strujanju. Razmatra se fizika negradijentne turbulentne difuzije i negativne produkcije u brzinskim i temperaturskim poljima. Utvrđena je izvesna analogija između turbulentnih procesa u ovim klasama strujanja. Pomoću numeričke obrade sopstvenih eksperimentalnih rezultata izvršeno je modeliranje nelokalnog turbulentnog prenosa u vihornom strujanju.
AB  - The turbulence structure investigation is essential for understanding the physics of flow-thermodynamic processes in Heating, Ventilation and Air conditioning (HVAC) systems. Analysis and calculation of these systems are based on the knowledge of turbulent transfer mechanism and its modeling. In this regard, the paper analyzes the phenomena of non-local momentum transfer and non-local transfer of energy by heat in curved channels, asymmetric jets, wakes and swirling flow. The physics of nongradient turbulent diffusion and negative production in velocity and temperature fields are analyzed. There was a certain analogy between the turbulent processes in these classes of flow. By means of numerical processing of experimental results, modeling of non-local transport in turbulent swirling flow was conducted.
PB  - Univerzitet u Beogradu - Mašinski fakultet, Beograd
T2  - FME Transactions
T1  - Fenomeni nelokalnog turbulentnog prenosa i negradijentne toplotne difuzije u KGH sistemima
T1  - On the non-local turbulent transport and non-gradient thermal diffusion phenomena in HVAC systems
EP  - 125
IS  - 3
SP  - 119
VL  - 40
UR  - https://hdl.handle.net/21.15107/rcub_machinery_1584
ER  - 

@article{
author = "Burazer, Jela M. and Lečić, Milan and Čantrak, Svetislav",
year = "2012",
abstract = "Istraživanje strukture turbulencije je neophodno za razumevanje fizike strujno-termodinamičkih procesa u KGH sistemima. Analiza i proračun ovih sistema zasnovani su na poznavanju turbulentnog prenosa i njegovom modeliranju. S tim u vezi, u radu se analiziraju fenomeni nelokalnog prenosa impulsa i nelokalnog prenosa energije toplotom u zakrivljenim kanalima, asimetričnim mlazevima, vrtložnim tragovima i vihornom strujanju. Razmatra se fizika negradijentne turbulentne difuzije i negativne produkcije u brzinskim i temperaturskim poljima. Utvrđena je izvesna analogija između turbulentnih procesa u ovim klasama strujanja. Pomoću numeričke obrade sopstvenih eksperimentalnih rezultata izvršeno je modeliranje nelokalnog turbulentnog prenosa u vihornom strujanju., The turbulence structure investigation is essential for understanding the physics of flow-thermodynamic processes in Heating, Ventilation and Air conditioning (HVAC) systems. Analysis and calculation of these systems are based on the knowledge of turbulent transfer mechanism and its modeling. In this regard, the paper analyzes the phenomena of non-local momentum transfer and non-local transfer of energy by heat in curved channels, asymmetric jets, wakes and swirling flow. The physics of nongradient turbulent diffusion and negative production in velocity and temperature fields are analyzed. There was a certain analogy between the turbulent processes in these classes of flow. By means of numerical processing of experimental results, modeling of non-local transport in turbulent swirling flow was conducted.",
publisher = "Univerzitet u Beogradu - Mašinski fakultet, Beograd",
journal = "FME Transactions",
title = "Fenomeni nelokalnog turbulentnog prenosa i negradijentne toplotne difuzije u KGH sistemima, On the non-local turbulent transport and non-gradient thermal diffusion phenomena in HVAC systems",
pages = "125-119",
number = "3",
volume = "40",
url = "https://hdl.handle.net/21.15107/rcub_machinery_1584"
}

Burazer, J. M., Lečić, M.,& Čantrak, S.. (2012). Fenomeni nelokalnog turbulentnog prenosa i negradijentne toplotne difuzije u KGH sistemima. in FME Transactions
Univerzitet u Beogradu - Mašinski fakultet, Beograd., 40(3), 119-125.
https://hdl.handle.net/21.15107/rcub_machinery_1584

Burazer JM, Lečić M, Čantrak S. Fenomeni nelokalnog turbulentnog prenosa i negradijentne toplotne difuzije u KGH sistemima. in FME Transactions. 2012;40(3):119-125.
https://hdl.handle.net/21.15107/rcub_machinery_1584 .

Burazer, Jela M., Lečić, Milan, Čantrak, Svetislav, "Fenomeni nelokalnog turbulentnog prenosa i negradijentne toplotne difuzije u KGH sistemima" in FME Transactions, 40, no. 3 (2012):119-125,
https://hdl.handle.net/21.15107/rcub_machinery_1584 .

TY  - JOUR
AU  - Kosi, Franc
AU  - Burazer, Jela
AU  - Milovančević, Uroš
AU  - Stojković, Milena
PY  - 2011
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5701
AB  - A thermodynamic analysis of water – ammonia absorption refrigeration cycle is given in this paper. The refrigeration device includes a rectification column and additional heat exchangers, aimed at increasing thermodynamic efficiency of the  refrigeration cycle. The system scheme and description, calculation procedure  and table containing calculated values are given. The characteristics of the standard reversed cycle with compensation process based on mechanical work are given. It was concluded that, under certain conditions, the absorption refrigeration system can be comparable to the compression machine, if all the measures for improvement of the absorption refrigeration cycle were undertaken.
PB  - Beograd: SMEITS
T2  - KGH časopis
T1  - WHAT CAN BE EXPECTED FROM  ABSORPTION  REFRIGERATION  SYSTEMS?
IS  - 3
VL  - 40
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5701
ER  - 

@article{
author = "Kosi, Franc and Burazer, Jela and Milovančević, Uroš and Stojković, Milena",
year = "2011",
abstract = "A thermodynamic analysis of water – ammonia absorption refrigeration cycle is given in this paper. The refrigeration device includes a rectification column and additional heat exchangers, aimed at increasing thermodynamic efficiency of the  refrigeration cycle. The system scheme and description, calculation procedure  and table containing calculated values are given. The characteristics of the standard reversed cycle with compensation process based on mechanical work are given. It was concluded that, under certain conditions, the absorption refrigeration system can be comparable to the compression machine, if all the measures for improvement of the absorption refrigeration cycle were undertaken.",
publisher = "Beograd: SMEITS",
journal = "KGH časopis",
title = "WHAT CAN BE EXPECTED FROM  ABSORPTION  REFRIGERATION  SYSTEMS?",
number = "3",
volume = "40",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5701"
}

Kosi, F., Burazer, J., Milovančević, U.,& Stojković, M.. (2011). WHAT CAN BE EXPECTED FROM  ABSORPTION  REFRIGERATION  SYSTEMS?. in KGH časopis
Beograd: SMEITS., 40(3).
https://hdl.handle.net/21.15107/rcub_machinery_5701

Kosi F, Burazer J, Milovančević U, Stojković M. WHAT CAN BE EXPECTED FROM  ABSORPTION  REFRIGERATION  SYSTEMS?. in KGH časopis. 2011;40(3).
https://hdl.handle.net/21.15107/rcub_machinery_5701 .

Kosi, Franc, Burazer, Jela, Milovančević, Uroš, Stojković, Milena, "WHAT CAN BE EXPECTED FROM  ABSORPTION  REFRIGERATION  SYSTEMS?" in KGH časopis, 40, no. 3 (2011),
https://hdl.handle.net/21.15107/rcub_machinery_5701 .