利用四面体斜坡抑制圆孔下游的CVP(反向旋转涡对)，采用PLIF(平面激光诱导荧光)技术，在吹风比为0.5、1.0、1.5和2.0的情况下，针对四面体斜坡与圆形气膜孔的6种相对布置方式，实验研究并分析设置四面体斜坡后对气膜孔下游气膜冷却特性产生的影响。实验研究表明：相对于气膜孔，6种四面体斜坡模型都可以抑制CVP，提高气膜冷却效率；在6种四面体斜坡模型中，气膜孔上、下游同时放置逆风斜坡的组合模型可以取得最长的气膜长度和最高展向平均效率，当吹风比为0.5和2.0时，气膜孔出口下游x/d=3面上的展向平均效率分别是未设置四面体斜坡时的3.7和4.9倍。

Tetrahedral-ramp was used to suppress the CVP (counter vortex pair) downstream of a cylindrical filmhole.This experiment investigated the effects of heights, directions and locations of four types of individual tetrahedralramps and two combined tetrahedralramps on the film cooling characteristics by PLIF (Planar Laser Induced Fluorescence) technique, at four blowing ratios of 0.5, 1.0, 1.5, and 2.0. It indicates that: 1) in comparison with the cylindrical hole, six types of tetrahedral-ramps can suppress the CVP, and improve the film cooling efficiency thereby; 2) the combined model synchronously constructed by the upstream and downstream upwindramps can provide the longest film coverage length and highest lateralaveraged effectiveness, among the six models.In comparison with the cylindrical filmhole,the lateral-averaged effectiveness in Plane x/d=3 downstream of the hole-exit is respectively increased up to 3.7 times at BR=0.5 and 4.9 times at BR=2.0.

TK474.7

国家自然科学基金（51376168，51506191）；中央高校基本科研业务费专项资金(WK2090130020)