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.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2010年第2期239-242,共4页
Journal of Engineering Thermophysics
基金
国家973项目(No.2007CB210100)
关键词
气膜冷却
压力敏感漆
横槽
复合角
吹风比
film cooling pressure sensitive paint trench compound angle blowing ratio
