马朋辉,寇志海,尹训彦,李广超,卫海桥

• 1:沈阳航空航天大学航空发动机学院

摘要(Abstract)：

为了解决圆柱孔在低吹风比下冷却裕度不足、高吹风比下冷流脱离壁面的技术难题，基于圆柱形孔的尖端覆盖涡流发生器（TCVG），提出了一种新型涡流发生器（VG）设计，即瓦片形涡流发生器（TVG）。对传统圆柱孔与带有TVG的圆柱形孔进行数值模拟，模拟结果表明：采用TVG时，气膜冷却效率比传统圆柱孔提高200%左右，并且解决了传统圆柱气膜孔在高吹风比下冷流从壁面脱离的情况；随着TVG宽度的增加，气膜冷却效率增加，当宽度达到2倍气膜孔直径时气膜冷却效率趋于稳定；随着TVG高度的增加，TVG对冷流的压制作用减弱，且在高吹风比下近场区出现未冷却的间隙，气膜冷却效率呈现下降趋势。TVG扩张角对气膜冷却效果的影响较小，最优扩张角为7.5°。

关键词(KeyWords)： 气膜冷却;瓦片形涡流发生器;吹风比;冷却效率;数值模拟

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目（52376028）~~

作者(Author): 马朋辉,寇志海,尹训彦,李广超,卫海桥

DOI: 10.19666/j.rlfd.202503033

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