高负荷亚音叶栅分区壁温流动控制方法研究  

Investigation of a Flow Control Method Based on the Regional Wall Temperature Control for High-Load Subsonic Cascade

作　　者：任晓栋 王旭[1] 顾春伟[1] REN Xiaodong;WANG Xu;GU Chunwei(Department of Energy and Power Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学能源与动力工程系燃气轮机研究所,北京100084

出　　处：《工程热物理学报》2024年第11期3309-3316,共8页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.52176039);国家科技重大专项(2017-II-0007-0021)。

摘　　要：在燃气轮机高负荷轴流压气机中,高负荷亚音级是重要的组成部分,其气动性能对压气机整机性能具有重要的影响。角区分离是高负荷亚音级内固有的一种流动现象,发展角区分离流动抑制方法对提升压气机性能具有重要意义。本文以高负荷亚音叶栅为对象,开展了分区壁温控制对角区分离影响的研究,研究表明,端壁冷却可有效抑制角区分离区域内的回流区角涡,使出口总压损失减小11%,相较于叶片冷却,端壁冷却对吸力面大尺度分离回流影响更为显著。基于流动分离机理,针对性对关键区域进行壁温控制,可有效抑制分离损失,同时降低冷却结构复杂度和额外的能量消耗。High-load subsonic stages,which have significant influence on the compressor performance,are key components of the high-load axial compressor of gas turbine.The corner separation is an inherent flow phenomenon in the high-load subsonic stage,and it is very important to develop methods to suppress corner separation for improving the compressor performance.In this paper,the effect of regional wall temperature control on the corner separation was studied with a high-load subsonic cascade as the object.The results show that endwall cooling can effectively suppress the corner vorticity in the corner separation region,reducing the outlet total pressure loss about 11%.Compared with the blade cooling,endwall cooling has a more significant effect on the large-scale separation of the suction side.Based on the flow separation mechanism,the wall temperature control in the key region can effectively inhibit the separation loss,and reduce the complexity of the cooling configuration and additional cooling energy consumption.

关 键 词：轴流压气机 高负荷亚音级 分区壁温控制 角区分离 分离抑制方法 

分 类 号：TK123[动力工程及工程热物理—工程热物理]