张德恒,贺业光,杨天华,张涛,杜涛

• 1:沈阳航空航天大学能源与环境学院
• 2:东北大学冶金学院

摘要(Abstract)：

为了挖掘凹坑气膜孔的气膜冷却潜力，数值模拟研究了等截面凹坑孔、同心椭圆凹坑孔以及在这2种孔型基础上提出的2种圆角凹坑气膜孔的气膜冷却特性，对4种凹坑气膜孔在吹风比为0.5、1.0和1.5时的冷却效率曲线进行分析。结果表明：凹坑气膜孔与带圆角凹坑气膜孔的凹坑展向宽度增加，有利于冷却气膜的展向覆盖；在3个吹风比条件下，凹坑气膜孔进行圆角处理之后，附壁效应强化了冷却射流贴附壁面的能力，近孔区域的气膜冷却效率明显提高；随着吹风比增加，对于等截面凹坑孔，圆角处理之后的面平均气膜冷却效率分别提高了76%、139%、155%；圆角同心椭圆凹坑孔相比同心椭圆凹坑孔，面平均气膜冷却效率分别提升18%、27%、29%。

关键词(KeyWords)： 气膜冷却;涡轮叶片;圆角凹坑;数值模拟;肾形涡对

Abstract:

Keywords:

基金项目(Foundation): 辽宁省教育厅项目（JYT2020044）~~

作者(Author): 张德恒,贺业光,杨天华,张涛,杜涛

DOI: 10.19666/j.rlfd.202401013

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