As part of our efforts to understand better ways and means to further improve jet engine performance, the influence of trailing edge coolant ejection rate and cut-back length on energy loss and shockwave intensity of a transonic turbine blade is numerically investigated with an exit Mach number of 1.2 for different coolant/main stream mass-flux ratios and cut-back lengths. Test results indicate both coolant ejection rate and cutback length have their optimum values, and the best ejection rate and the best cut-back length correlate with each other. From the view of minimizing the energy loss coefficient, the best ejection rate decreases with the increasing cut-back length. And from the view of minimizing the trailing edge shockwave intensity, a higher trailing edge coolant ejection rate and a longer trailing edge cut-back can reduce the shockwave intensity. It is therefore believed that these findings can of course facilitate the design of a trailing edge cooling system for transonic turbine blade to further improve jet engine performance. Moreover, trailing edge coolant ejection can be considered as an active flow control method at the same time.
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ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition
June 13–17, 2016
Seoul, South Korea
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-4970-5
PROCEEDINGS PAPER
Influence of Trailing Edge Coolant Ejection Rate and Cut-Back Length on Energy Loss and Shockwave Intensity of a Transonic Turbine Blade
Yufeng Wang,
Yufeng Wang
Harbin Institute of Technology, Harbin, China
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Xun Zhou,
Xun Zhou
Harbin Institute of Technology, Harbin, China
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Xun Liu,
Xun Liu
NO.703 Research Institute of CSIC, Harbin, China
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Songtao Wang
Songtao Wang
Harbin Institute of Technology, Harbin, China
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Yufeng Wang
Harbin Institute of Technology, Harbin, China
Xun Zhou
Harbin Institute of Technology, Harbin, China
Xun Liu
NO.703 Research Institute of CSIC, Harbin, China
Songtao Wang
Harbin Institute of Technology, Harbin, China
Paper No:
GT2016-56859, V02BT38A030; 11 pages
Published Online:
September 20, 2016
Citation
Wang, Y, Zhou, X, Liu, X, & Wang, S. "Influence of Trailing Edge Coolant Ejection Rate and Cut-Back Length on Energy Loss and Shockwave Intensity of a Transonic Turbine Blade." Proceedings of the ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. Volume 2B: Turbomachinery. Seoul, South Korea. June 13–17, 2016. V02BT38A030. ASME. https://doi.org/10.1115/GT2016-56859
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