摘要
为探究端壁自适应射流对叶栅角区分离和损失特性的影响,以高速扩压叶栅为研究对象,对端壁自适应射流不同出口位置方案进行了数值模拟。研究结果表明:应用端壁自适应射流能有效控制角区分离,减少低能流体堆积,提升叶栅扩压能力,降低叶栅的总压损失,4°冲角时叶栅出口总压损失系数的相对减小量最大可达9.17%。随着端壁自适应射流出口位置向尾缘移动,总压损失系数呈现先减小后增大的控制趋势。出口位置位于分离区中部附近时控制效果最佳,出口位置过于靠前会使总压损失显著增加,同时来流冲角对减损效果的影响也更加明显,正冲角下的叶栅相较于设计冲角更易控制。
To explore the effects of endwall self-adaptive injection on corner separation and loss performance of high speed compressor cascade,the different outlet positions of endwall self-adaptive injection were studied by numerical simulation method.The results showed that the application of endwall self-adaptive injection can effectively control corner separation,reduce low-energy fluid accumulation,improve cascade pressure expansion ability and reduce total pressure loss of the cascade.The maximum relative reduction of the total pressure loss coefficient of 9.17%of the cascade at attack angle i=4°was obtained.The control effect of the total pressure loss coefficient decreased and then increased with the outlet position of endwall self-adaptive injection moving towards the trailing edge.The optimal control effect was achieved when the outlet position of endwall self-adaptive injection was located near the middle of the suction separation.However,the total pressure loss significantly increased when the outlet position was too far forward.And the effect of the inflow attack angle on the loss reduction effect was also more significant while the cascade at a positive attack angle was easier to control compared with the design attack angle when the outlet position was too far forward.
作者
梁作召
孙鹏
李晓东
刘晗
LIANG Zuozhao;SUN Peng;LI Xiaodong;LIU Han(College of Safety Science and Engineering,Civil Aviation University of China,Tianjin 300300,China;Harbin Marine Boiler and Turbine Research Institute,China Shipbuilding Industry Corporation,Harbin 150078,China)
出处
《航空动力学报》
北大核心
2025年第3期431-441,共11页
Journal of Aerospace Power
基金
国家自然科学基金民航联合基金重点项目(U2233207)。
关键词
端壁自适应射流
角区分离
高速扩压叶栅
流动控制
总压损失
endwall self-adaptive injection
corner separation
high speed compressor cascade
flow control
total pressure loss
