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.
基金
National Natural Science Foundation of China (50876041)
作者简介
YANG Chengfeng received B.S. degree in 2003, M.S. degree in 2006 and Ph.D. degree in 2009 from Nanjing University of Aeronautics and Astronautics. Her main research interests are heat transfer and computational fluid dynamics. E-mail：yezihappy 111 @ 163.comZHANG Jingzhou received B.S. degree from Tsinghua University in 1986 and M.S. degree from Southeast University in 1989 and Ph.D. degree from Nanjing University of Aeronautics and Astronautics in 1992 respectively. Now, he is a professor in Nanjing University of Aeronautics and Astronautics. He has done a lot of researches on mixer-ejector and enhanced heat transfer, and published several scientific papers in various periodicals. E-mail： zhangjz@nuaa.edu.cn Corresponding author. Tel.： ＋86-25-84895909. E-mail address： zhangjz@nuaa.edu.cn
