Startseite Technik CFD Analysis and Experimental Validation of the Flow Field in a Rib Roughed Turbine Internal Cooling Channel
Artikel
Lizenziert
Nicht lizenziert Erfordert eine Authentifizierung

CFD Analysis and Experimental Validation of the Flow Field in a Rib Roughed Turbine Internal Cooling Channel

  • Yasin Sohret EMAIL logo und T. Hikmet Karakoc
Veröffentlicht/Copyright: 12. Dezember 2018
Veröffentlichen auch Sie bei De Gruyter Brill

Abstract

Advances in thermal science force us to develop more efficient systems. The efficiency of widely-used gas turbine engines, is highly dependent on turbine inlet temperature. However, a high turbine inlet temperature yields material deterioration and long term degradation of turbines. To prevent material deterioration, cooling the hot zones of gas turbine engines, particularly turbine components and blades, is a priority. In this way, long term degradation of the turbine is prevented, while the thermal efficiency of the gas turbine engine is boosted. In the current paper, a flow field within a rib roughed blade internal cooling channel is discussed. Within this scope, a computational fluid dynamics analysis is conducted using a Standard k-ω turbulence model. After this, the same case is experimentally investigated. Experimental results obtained from particle image velocimetry measurements are used to validate the results of the computational fluid dynamics analysis. At the end of the study, the flow field is fully mapped with the recirculation and separation zones being clearly pinpointed.

Nomenclature

ρ

Density

Γ k

Effective diffusion of the turbulence kinetic energy

Γ k

Effective diffusion of the diffusion rate

G k

Turbulence kinetic energy of the mean velocity gradients

G ω

Turbulence vorticity induced specific diffusion rates

Y k

Dissipation rate of the turbulence kinetic energy

Y ω

Specific diffusion rate

S k

Rate of production of k

S ω

Rate of production of ω

ω

Specific turbulent dissipation rate

μ t

Eddy viscosity

σ k

Turbulence modeling constant

σ ω

Turbulence modeling constant

Acknowledgements

This research was conducted within the framework of a project funded by Anadolu University under grant No. 1403F078. The authors are grateful to Anadolu University for its support.

References

1. Sunden B, Xie G. Gas turbine blade tip heat transfer and cooling: a literature survey. Heat Transfer Eng. 2010;31:527–54.10.1080/01457630903425320Suche in Google Scholar

2. Ibrahim TK, Rahman MM, Abdalla AN. Improvement of gas turbine performance based on inlet air cooling systems: A technical review. Int J Phys Sci. 2011;6:620–7.Suche in Google Scholar

3. Horlock JH. Advanced gas turbine cycles: a brief review of power generation thermodynamics. Netherlands: Elsevier, 2013.Suche in Google Scholar

4. Han JC, Dutta S, Ekkad S. Gas turbine heat transfer and cooling technology. London: CRC Press, 2013.10.1201/b13616Suche in Google Scholar

5. Han JC, Glicksman LR, Rohsenow WM. An investigation of heat transfer and friction for rib-roughened surfaces. Int J Heat Mass Transf. 1978;21:1143–56.10.1016/0017-9310(78)90113-8Suche in Google Scholar

6. Han JC. Heat transfer and friction in channels with two opposite rib-roughened walls. J Heat Transfer. 1984;106:774–81.10.1115/1.3246751Suche in Google Scholar

7. Liou TM, Wu YY, Chang Y. LDV Measurements of Periodic Fully Developed Main and Secondary Flows in a Channel With Rib-Disturbed Walls. Journal of Fluids Engineering, 1993;115(1):109. doi:10.1115/1.291009110.1115/1.2910091Suche in Google Scholar

8. Taslim ME, Li T, Kercher DM. Experimental heat transfer and friction in channels roughened with angled, V-shaped and discrete ribs on two opposite walls. In ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition, 1994.10.1115/94-GT-163Suche in Google Scholar

9. Rau G, Cakan M, Moeller D, Arts T. The effect of periodic ribs on the local aerodynamic and heat transfer performance of a straight cooling channel. In ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition, Birmingham: American Society of Mechanical Engineers, 1996.10.1115/96-GT-541Suche in Google Scholar

10. Cakan M, Arts T. Effect of main and secondary flows on heat transfer in a rib-roughened internal cooling channel. In International symposium on experimental and computational aerothermodynamics of internal flows, 1999.Suche in Google Scholar

11. Buchlin JM. Convective heat transfer in a channel with perforated ribs. Int J Therm Sci. 2002;41:332–40.10.1016/S1290-0729(02)01323-6Suche in Google Scholar

12. Elfert M, Jarius MP, Weigand B. Detailed flow investigation using PIV in a typical turbine cooling geometry with ribbed walls. In ASME Turbo Expo 2004: Power for Land, Sea, and Air, Vienna: American Society of Mechanical Engineers, 2004.10.1115/GT2004-53566Suche in Google Scholar

13. Kumar S, Amano RS. Gas turbine blade cooling passage with V and broken V shaped ribs. In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition, 2016.10.1115/GT2016-56016Suche in Google Scholar

14. Zacharzewski P, Simmons K, Jefferson-Loveday R, Capone L. Evaluation of the SST-SAS model for prediction of separated flow inside turbine internal cooling passages. In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition, 2016.10.1115/GT2016-56117Suche in Google Scholar

15. Zeng J, Gao T, Li J, Zhu J, Fei J. Numerical investigation on flow and heat transfer characteristics of steam and mist/steam in internal cooling channels with different rib angles. In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition, 2016.10.1115/GT2016-56812Suche in Google Scholar

16. Pearce R, Ireland P, McGilvray M, Romero E. Computational study of the effect of inlet velocity profile and rib orientation on heat transfer in rotating ribbed radial turbine cooling passages. In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition, 2016.10.1115/GT2016-57832Suche in Google Scholar

17. Blazek J. Computational fluid dynamics: principles and applications. UK: Butterworth-Heinemann, 2015.10.1016/B978-0-08-099995-1.00012-9Suche in Google Scholar

18. Gulyás A, Bodor Á, Regert T, Jánosi IM. PIV measurement of the flow past a generic car body with wheels at LES applicable Reynolds number. Int J Heat Fluid Flow. 2013;43:220–32.10.1016/j.ijheatfluidflow.2013.05.012Suche in Google Scholar

19. Watanabe R, Gono T, Yamagata T, Fujisawa N. Three-dimensional flow structure in highly buoyant jet by scanning stereo PIV combined with POD analysis. Int J Heat Fluid Flow. 2015;52:98–110.10.1016/j.ijheatfluidflow.2014.12.003Suche in Google Scholar

20. Rabault J, Vernet JA, Lindgren B, Alfredsson PH. A study using PIV of the intake flow in a diesel engine cylinder. Int J Heat Fluid Flow. 2016;62:56–67.10.1016/j.ijheatfluidflow.2016.06.020Suche in Google Scholar

21. Ozturk NA, Ozalp C, Canpolat C, Sahin B. PIV measurements of flow through normal triangular cylinder arrays in the passage of a model plate-tube heat exchanger. Int J Heat Fluid Flow. 2016;61:531–44.10.1016/j.ijheatfluidflow.2016.06.013Suche in Google Scholar

22. Yamada S, Nakamura H. Construction of 2D-3C PIV and high-speed infrared thermography combined system for simultaneous measurement of flow and thermal fluctuations over a backward facing step. Int J Heat Fluid Flow. 2016;61:174–82.10.1016/j.ijheatfluidflow.2016.04.010Suche in Google Scholar

23. Zaghian R, Tavakoli MR, Karbasipour M, Ahmadabadi MN. Experimental study of flow structures of a solitary wave propagating over a submerged thin plate in different angles using PIV technique. Int J Heat Fluid Flow. 2017;66:18–26.10.1016/j.ijheatfluidflow.2017.05.010Suche in Google Scholar

24. Raffel M, Willert CE, Wereley S, Kompenhans J. Particle image velocimetry: a practical guide. Germany: Springer, 2013.Suche in Google Scholar

Received: 2018-11-08
Accepted: 2018-11-22
Published Online: 2018-12-12
Published in Print: 2022-05-25

© 2018 Walter de Gruyter GmbH, Berlin/Boston

Heruntergeladen am 19.1.2026 von https://www.degruyterbrill.com/document/doi/10.1515/tjj-2018-0043/pdf
Button zum nach oben scrollen