冲击/发散冷却气膜冷却效率的实验研究  

EXPERIMENT RESEARCH ON FILM COLLING EFFECTIVENESS OF IMPINGEMENT/EFFUSION COOLING

作　　者：王磊[1] 张靖周[1] 杨卫华[1] 李廷斌[1] 

机构地区：[1]南京航空航天大学动力与能源学院,江苏南京210016

出　　处：《工程热物理学报》2007年第z2期97-100,共4页Journal of Engineering Thermophysics

基　　金：航空科学基金(No.03C52019)

摘　　要：采用红外热像仪对冲击/发散冷却发散壁绝热壁温进行了测试,研究了气膜冷却效率随吹风比、孔间距、冲击间距、发散孔角度及排列方式的变化规律.研究结果表明,气膜冷却效率随发散孔角度的不同而差异较大;35°发散孔的冷却效率随吹风比的增大而减小,90°发散孔的冷却效率随吹风比的变化因孔阵布置方式的不同而有所差异;冲击间距对90°发散孔的冷却效率影响微弱,对35°发散孔的冷却效率影响较大;吹风比相同,孔间距越小冷却效率越高.The experimental investigations on impingement/effusion cooling are conducted to reveal the influencing factor of film cooling effectiveness,such as blowing ratios,the impingement distance, hole to hole spacing,arrangement form of holes.In experiment,the infrared camera is used to mea- sure the temperature distribution of the effusion wall surface.The results of experiment show that: Under different angle of effusion holes,film cooling effectiveness has great difference;The film cooling effectiveness of 35°holes decreases with the blowing ratios rising,while for 90°holes,the changes of film cooling effectiveness with blowing ratios are related with the arrangement of holes;For 90°holes, the effect of impingement distance is lower,while for 35°holes,it's effect is higher;With the same blowing ratios,cooling effectiveness increases with the decline of hole to hole space.

关 键 词：冲击/发散 冷却效率 实验研究 

分 类 号：TK124[动力工程及工程热物理—工程热物理]