基于压敏漆的带横槽气膜冷却实验与数值研究  

FILM COOLING PERFORMANCE OF THE EMBEDDED HOLES IN TRENCHES WITH COMPOUND ANGLES

作　　者：李佳[1] 韩昌[1] 任静[1] 蒋洪德[1] 

机构地区：[1]清华大学热能工程系,北京100084

出　　处：《工程热物理学报》2010年第2期239-242,共4页Journal of Engineering Thermophysics

基　　金：国家973项目(No.2007CB210100)

摘　　要：为改善燃气轮机高温透平叶片的设计,使用压力敏感漆实验技术和数值方法对平板气膜冷却进行对比研究,分析了0°、45°和90°复合角时,有无横槽结构对圆孔气膜冷却的影响。结果表明有复合角时横槽结构能显著提高气膜冷却效率,因为横槽壁对射流形成阻碍作用,在横槽内形成侧向涡,加强了由复合角引起的射流侧向动量。In this study the cooling performance of the embedded holes in transverse trenches are explored both by pressure sensitive paint experiment technology and RANS algorithm,considering three compound angles,0°,45°and 90°.The results show that compound angles together with a trench can further enhance the film cooling effectiveness.A lateral passage vortex is formed inside the trench which strengthens the lateral spreading of the jets.

关 键 词：气膜冷却 压力敏感漆 横槽 复合角 吹风比 

分 类 号：TK474.7[动力工程及工程热物理—动力机械及工程]