摘要
本文对开槽前扩孔及在此基础上加30°、45°和60°不同角度复合角的气膜冷却结构进行了数值模拟,计算了指定冷却壁面的温度场分布以及冷却效率。结果表明:引入复合角后,能够改善冷却气膜在壁面的横向分布,复合角越大,气膜分布越均匀。在高吹风比下,复合角结构能够产生较大的气膜覆盖范围和较好的冷却效果。
Numerical simulation technique is used to investigate the effects of a coinpound angle （30°, 45° or 60°） on the film cooling performance based on a trench-shaped hole geometry. From the film cooling efficiency and velocity distribution, the results indicate that the compound angle can improve the lateral coverage of cooling film over a hot surface. Moreover, with the increase of the compound angle, the cooling film shows considerable uniform cover and better cooling performance, especially at a high blowing ratio.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2009年第10期1723-1725,共3页
Journal of Engineering Thermophysics
基金
国家重点基础研究发展规划项目(No.2007CB210107)
关键词
气膜冷却
开槽前扩孔
复合角
film cooling
trench-shaped hole
compound angle
