Gas-Dynamic Temperature Stratification in the Leontiev Tube: Analytical Study and Numerical Modeling
https://doi.org/10.21822/2073-6185-2025-52-1-13-21
Abstract
Objective. The article is dedicated to the study of heat transfer processes in a Leontiev tube based on the principle of gas-dynamic temperature stratification. The objective of this work is to describe the mechanism of interaction between subsonic and supersonic flows and identify key parameters influencing stratification efficiency.
Method. The study was conducted using an analytical approach and numerical modeling in the ANSYS Fluent environment. Temperature and velocity fields were visualized, and heat flow density was analyzed. The k−ω SST turbulence model was applied, enabling the consideration of complex gas flow characteristics in the tube.
Results. The main heat transfer patterns were identified, including the effects of temperature and pressure differences between subsonic and supersonic flows, as well as the role of turbulent energy in enhancing heat exchange. It was established that the gas exiting the supersonic channel is heated compared to the inlet conditions, while the gas exiting the subsonic channel is cooled.
Conclusion. The results can be used to improve the efficiency of heat exchange in industrial systems and to design heat recovery devices.
About the Authors
R. S. Rudnik
Ulyanovsk State Technical University
Russian Federation
Russian Federation
Roman S. Rudnik, PhD student, Department of Thermal and Fuel Energy,
32 Northern Venets St., Ulyanovsk 432027
A. F. Matveev
Ulyanovsk State Technical University
Russian Federation
Russian Federation
Alexander F. Matveev, PhD student, Department of Thermal and Fuel Energy,
32 Northern Venets St., Ulyanovsk 432027
V. N. Kovalnogov
Ulyanovsk State Technical University
Russian Federation
Russian Federation
Vladislav N. Kovalnogov, Dr. Sci. (Eng.), Prof., Department of Thermal and Fuel Energy,
32 Northern Venets St., Ulyanovsk 432027
References
1. Leont’ev A.I. Gas-dynamic method of energy separation of gas flows. High Temperature. 1997;35(1):157 (In Russ).
2. Tsvetova E.V., Modeling and study of the process of gas-dynamic temperature stratification for improving the efficiency of natural gas reduction. E.V. Tsvetova, V.N. Kovalenogov, Yu.A. Khakhalev. Informatics, Computer Engineering, and Control. 2021;2:54–58. (In Russ).
3. Tsynaeva A.L., Tsynaeva E.A., Shkolin E.V. Study of methods for intensifying heat transfer in a temperature stratification pipe. University Proceedings. Aviation Technology. 2013;4:44–46. (In Russ).
4. Kovalenogov N.N., Fokeeva E.V. Increasing the efficiency of gas-dynamic temperature stratification by using dispersed working substances. Proceedings of the V International Scientific and Technical Conference “Modern Scientific and Technical Transport Problems. Ulyanovsk, 2009: 64–67. (In Russ).
5. Temperature stratification in a supersonic dispersed flow. N.N. Kovalenogov, L.M. Magazinnik, E.V. Fokeeva, M.A. Kuzmina. Proceedings of the XVII School-Seminar for Young Scientists under the leadership of RAS Academician A.I. Leont’ev. M.: MEI Publishing. 2009; 2:213–216. (In Russ).
6. Karpukhina T.V., Kovalenogov V.N., Tsvetova E.V. Improving the efficiency of temperature stratification of exhaust drying agents. Bulletin of Scientific Research. 2019; 2(3):50–57. (In Russ).
7. Tarasevich S.E., Filin V.A., Shchukin V.K. Heat transfer of a dispersed flow on impermeable and permeable walls of a flat asymmetric nozzle. University Proceedings. Aviation Technology. 2001;1:47–50.(In Russ).
8. Khazov D.E. Modeling of flow in a flat channel with friction and heat transfer. Proceedings of the XV School-Seminar for Young Scientists and Specialists under the leadership of RAS Academician A.I. Leont’ev. In two volumes. Kaluga. May 23–27, M.: MEI Publishing. 2005; 1:121–124. (In Russ).
9. Tsynaeva A.L., Tsynaeva E.A., Shkolin E.V. Study of methods for intensifying heat transfer in a temperature stratification pipe. University Proceedings. Aviation Technology. 2013;4:44–46. (In Russ).
10. Olympiev V.V. Heat transfer surfaces with enhanced heat dissipation and reduced resistance. University Proceedings. Aviation Technology. 2000; 3: 35–38. (In Russ).
11. Popovich S.S., Vinogradov Yu.A., Strongin M.M. Experimental study of the possibility of intensifying heat transfer in a non-mechanical energy separation device. Bulletin of SSAU. 2015;14(2):159–169. (In Russ).
12. Tarasevich S.E., Filin V.A., Shchukin V.K. Heat transfer of a dispersed flow on impermeable and permeable walls of a flat asymmetric nozzle. University Proceedings. Aviation Technology. 2001;1: 47–50. (In Russ).
13. Gifford W.E., Longsworth. Pulse-tube Refrigeration. Journal of Manufacturing Science and Engineering. 1964;86(3)264–268.
14. Kern D., Kraus A. Enhanced Heat Transfer Surfaces. M.: Energy, 1977: 464. (In Russ).
15. Hall I.M., Berry. On the Heating Effect in a Resonance Tube. Journal of the Aerospace Sciences. 1959;26: 253.
16. Tsynaeva A.A. Modeling of a combined cooling system for turbine blades with a vortex energy separator: Abstract of dissertation for the degree of candidate of technical sciences. Ulyanovsk: Ulyanovsk State Technical University, 2004;19. (In Russ).
17. Kovalenogov N.N. Selection of optimal parameters for the process of gas-dynamic temperature stratification in a supersonic gas flow. University Proceedings. Aviation Technology. 2010;3:28–31. (In Russ).
18. Leont’ev A.I. Temperature stratification of supersonic gas flow. Doklady Physics. 1997;42(6):309–311.
19. Tsynaeva A.A., Tsynaeva E.A., Shkolin E.V. On the use of heat pipes to improve the efficiency of gasdynamic temperature stratification. Bulletin of the Samara State Aerospace University. 2013;3 (41) Part 2: 192–197. (In Russ).
20. Popovich S.S., Vinogradov Yu.A., Strongin M.M. Experimental study of the possibility of intensifying heat transfer in a non-mechanical energy separation device. Bulletin of SSAU. 2015; 14(2):159–169. (In Russ)
21. Burtsev S.A. Study of ways to improve the efficiency of gas-dynamic energy separation. High Temperature Physics. 2014;52(1):14–21 (In Russ).
Review
For citations:
Rudnik R.S., Matveev A.F., Kovalnogov V.N. Gas-Dynamic Temperature Stratification in the Leontiev Tube: Analytical Study and Numerical Modeling. Herald of Dagestan State Technical University. Technical Sciences. 2025;52(1):13-21. (In Russ.) https://doi.org/10.21822/2073-6185-2025-52-1-13-21
Views:
81
Email this article 
