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Influence of Multi-hole Arrangement on Cooling Film Development 被引量:12

Influence of Multi-hole Arrangement on Cooling Film Development
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摘要 A series of computations is conducted for many multi-hole arrangements at several blowing ratios to further investigate the evolution of the film from multi-holes. The influence of multi-hole arrangement on effusion film cooling is analyzed and a preliminary relationship evaluating the film development from developing state to developed state is brought forward. Results show that the coolant jets from front rows of multi-holes merge rapidly and the strength of the kidney vortices due to mainstream-coolant jet interaction in the downstream region are mitigated under super-long-diamond arrangement where the streamwise hole-to-hole pitch is bigger than spanwise hole-to-hole pitch. The holes array arranged in super-long-diamond mode is not only in favor of obtaining developed film layer, but also improving averaged adiabatic film cooling effectiveness.
出处 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2012年第2期182-188,共7页 中国航空学报(英文版)
基金 National Natural Science Foundation of China (50876041)
关键词 effusion cooling multi-hole arrangement cooling effectiveness film development numerical simulation effusion cooling multi-hole arrangement cooling effectiveness film development numerical simulation
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