Volume 19, Issue 1 (January 2019)
Modares Mechanical Engineering 2019, 19(1): 191-200 |
Back to browse issues page
Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:
Hosseini Baghdad Abadi S, Zirak S, Rajabi Zargar Abadi M. Numerical Simulation of the Sinusoidal Wave Pulsed Film Cooling Effectiveness Due to the Changing Cooling Injection Parameters. Modares Mechanical Engineering 2019; 19 (1) :191-200
URL: http://mme.modares.ac.ir/article-15-23426-en.html
URL: http://mme.modares.ac.ir/article-15-23426-en.html
1- Energy coversion Department, Mechanical Engineering Faculty, Semnan University, Semnan, Iran
2- Energy coversion Department, Mechanical Engineering Faculty, Semnan University, Semnan, Iran ,s_zirak@semnan.ac.ir
2- Energy coversion Department, Mechanical Engineering Faculty, Semnan University, Semnan, Iran ,
Abstract: (4548 Views)
In this paper, the effect of the angle of injection on the film cooling effectiveness with sinusoidal wave pulsation is investigated at various frequencies. Four angles of injection are selected at 20, 25, 30, and 35 degrees. The pulsed flow is investigated at 3 frequencies of 2, 50, and 500 Hz. Geometry was simulated in Gambit and numerical analysis was done by Fluent software. The SST k-ω model was used for modeling turbulence. The results showed that the injection angle between 20 and 25 degrees in the frequencies studied had the most film cooling effectiveness of the central and lateral line, especially in the areas far from the edge of the hole. Higher frequencies (500 Hz) increase the effectiveness of the film cooling at the lower initial distances of the hole. At far distances, the lower frequency (2 Hz) is the most effectiveness. As the frequency increases, the difference in the cooling efficiency of the central and lateral lines decreases at different angles. As the frequency increases, the interruptions of the flow-off and the flow-on are reduced, and as a result, the instantaneous effectiveness also has a slower variation than the lower frequencies. The blowing ratio of 0.5 had the most value in comparison with the blowing ratio of 0.75 and 1 in all angles and frequencies.
Article Type: Original Research |
Subject:
Heat & Mass Transfer
Received: 2018/07/24 | Accepted: 2018/10/8 | Published: 2019/01/1
Received: 2018/07/24 | Accepted: 2018/10/8 | Published: 2019/01/1
References
1. 1- Yahya SM. Turbines compressors and fans. New delhi: McGraw-Hill Education (India) Pvt Limited; 2010. pp. 430-433. [Link]
2. Singh P, Shukla OP. Heat transfer analysis of gas turbine rotor blade cooling through staggered holes using CFD. International Journal of Engineering Research and General Science. 2016;4(2):538-545. [Link]
3. Gao W, Yue Z, Li L, Zhao Z, Tong F. Numerical simulation on film cooling with compound angle of blade leading edge model for gas turbine. International Journal of Heat and Mass Transfer. 2017;115(Pt A):839-855. [Link]
4. Moeini AH, Rajabi Zargarabadi M. Genetic algorithm optimization of film cooling effectiveness over a rotating blade. International Journal of Thermal Sciences. 2018;125:248-255. [Link] [DOI:10.1016/j.ijthermalsci.2017.11.030]
5. Li Y, Zhang Y, Su X, Yuan X. Experimental and numerical investigations of shaped hole film cooling with the influence of endwall cross flow. International Journal of Heat and Mass Transfer. 2018;120:42-55. [Link] [DOI:10.1016/j.ijheatmasstransfer.2017.11.150]
6. Hofmann HM, Movileanu DL, Kind M, Martin H. Influence of a pulsation on heat transfer and flow structure in submerged impinging jets. International Journal of Heat and Mass Transfer. 2007;50(17-18):3638-3648. [Link] [DOI:10.1016/j.ijheatmasstransfer.2007.02.001]
7. Kartuzova OV. A computational study for the utilization of jet pulsations in gas turbine film cooling and flow control [Dissertation]. Cleveland: Cleveland State University; 2010. [Link]
8. Ke Z, Wang J. Numerical investigations of pulsed film cooling on an entire turbine vane. Applied Thermal Engineering. 2015;87:117-126. [Link] [DOI:10.1016/j.applthermaleng.2015.05.022]
9. Bazdidi Tehrani F, Mahmoodi AA. Finite element analysis of flowfield in the single hole film cooling technique. Annals of the New York Academy of Sciences. 2001;934:393-400. [Link] [DOI:10.1111/j.1749-6632.2001.tb05875.x]
10. Coulthard SM, Volino RJ, Flack KA. Effect of jet pulsing on film cooling - Part I: Effectiveness and flow-field temperature results. Journal of Turbomachinery. 2006;129(2):232-246. [Link] [DOI:10.1115/1.2437231]
11. Ekkad SV, Ou S, Rivir RB. Effect of jet pulsation and duty cycle on film cooling from a single jet on a leading edge model. Journal of Turbomachinery. 2006;128(3):564-571. [Link] [DOI:10.1115/1.2185122]
12. Muldoon F, Acharya S. DNS study of pulsed film cooling for enhanced cooling effectiveness. International Journal of Heat and Mass Transfer. 2009;52(13-14):3118-3127. [Link] [DOI:10.1016/j.ijheatmasstransfer.2009.01.030]
13. Goldstein RJ, Stone LD. Row-of-holes film cooling of curved walls at low injection angles. Journal of Turbomachinery. 1997;119(3):574-579. [Link] [DOI:10.1115/1.2841160]
14. Lee JS, Jung IS. Effect of bulk flow pulsations on film cooling with compound angle holes. International Journal of Heat and Mass Transfer. 2002;45(1):113-123. [Link] [DOI:10.1016/S0017-9310(01)00133-8]
15. Kim JH, Kim KY. Film-cooling performance of converged-inlet hole shapes. International Journal of Thermal Sciences. 2018;124:196-211. [Link] [DOI:10.1016/j.ijthermalsci.2017.10.014]
16. Zeng L, Chen P, Li X, Ren J, Jiang H. Influence of simplifications of blade in gas turbine on film cooling performance. Applied Thermal Engineering. 2018;128:877-886. [Link] [DOI:10.1016/j.applthermaleng.2017.09.008]
17. Menter FR. Two-equation eddy-viscosity turbulence models for engineering applications. AIAA Journal. 1994;32(8):1598-1605. [Link] [DOI:10.2514/3.12149]
18. Lee KD, Kim KY. Surrogate based optimization of a laidback fan-shaped hole for film-cooling. International Journal of Heat and Fluid Flow. 2011;32(1):226-238. [Link] [DOI:10.1016/j.ijheatfluidflow.2010.08.007]
19. Sinha AK, Bogard DG, Crawford ME. Film-cooling effectiveness downstream of a single row of holes with variable density ratio. Journal of Turbomachinery. 1991;113(3):442-449. [Link] [DOI:10.1115/1.2927894]
20. Xu G, Zhu J, Tao Z. Application of the TLVA model for predicting film cooling under rotating frames. International Journal of Heat and Mass Transfer. 2010;53(15-16):3013-3022. [Link] [DOI:10.1016/j.ijheatmasstransfer.2010.03.029]
Send email to the article author
| Rights and permissions | |
 |
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. |