Influence of Multi-hole Arrangement on Cooling Film Development  

作　　者：YANG Chengfeng ZHANG Jingzhou 

机构地区：[1]AVIC The First Aircraft Institute, Xi＇ an 710089, China [2]College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

出　　处：《Chinese Journal of Aeronautics》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)

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.

关 键 词：effusion cooling multi-hole arrangement cooling effectiveness film development numerical simulation 

分 类 号：TQ440.5[化学工程—化学肥料工业] V263.1[航空宇航科学与技术—航空宇航制造工程]