冷却流初态对凹面圆斜孔气膜冷却的影响  

INFLUENCE OF COOLANT CONDITIONS ON FILM COOLING OVER CONCAVE SURFACE

作　　者：刘元清[1] 王扬平[1] 姜培学[1] 

机构地区：[1]热科学与动力工程教育部重点实验室,清华大学热能工程系,北京100084

出　　处：《工程热物理学报》2008年第6期1045-1047,共3页Journal of Engineering Thermophysics

基　　金：973项目(No.2007CB210107);国家自然科学基金重点项目(No.50736003)

摘　　要：本文对圆斜气膜孔在凹面上的气膜冷却进行了数值模拟。通过对气膜孔进口上游的冷却流设置不同的边界条件,研究了速度大小和方向等冷却流初态对气膜冷却效果的影响。计算结果表明,冷却流初态对凹面上的气膜冷却同样存在不可忽略的影响;在计算工况内,冷却流和主流一致或相逆的工况下冷却效果基本相同,但冷却流和主流交错的工况下,冷却效率显著提高。Influence of initial coolant conditions, such as magnitudes and directions of coolant velocity, on the film hole entrance was investigated numerically. Apparent changes of cooling performance were confirmed after comparison on cooling effectiveness distribution. Based on those calculated film cooling cases, similar cooling performance were found with cooling streams flow in the same or conversed directions to the mainstream, while significant elevation of surface cooling effectiveness was achieved by setting the coolant stream direction perpendicular to that of mainstream.

关 键 词：气膜冷却 冷却流初态 凹面 数值计算 

分 类 号：TK124[动力工程及工程热物理—工程热物理]