变工况下非轴对称端壁环形叶栅流场特性实验  

Experimental investigation on flowfields of non-axisymmetric endwall of annular cascades in multi condition

作　　者：郑金[1] 李国君[1] 贾海东[1] 汪传美[1] 董康田[2] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049 [2]西安热工研究院有限公司,西安710032

出　　处：《航空动力学报》2008年第12期2308-2313,共6页Journal of Aerospace Power

基　　金：国家自然科学基金(50476052)

摘　　要：通过风洞实验对三角函数非轴对称端壁造型法和压差非轴对称端壁造型法设计的环形叶栅在设计工况和非设计工况下的流场参数进行了测量与分析.结果表明:不同进出口条件时,非轴对称端壁造型对于流场参数影响呈现出一些新特点.由于压力面与吸力面上压力改变的幅度大小会因为来流条件的变化而不同,当地总压损失系数会随着出口马赫数的降低而减小,二次流速度矢量分布规律不会随着出口马赫数的变化而不同,但二次流速度大小及通道涡系强度会随着出口马赫数的降低而减小.Aerodynamic performance of two kinds of annular turbine cascade with nonaxisymmetric endwall profiling methods, which are designed by trigonometric function controlling method and pressure difference controlling method, was experimentally studied in the annular cascade wind tunnel test rig under designed condition and off-designed condition. The results show that some new characteristic are present under different flow conditions： amplitude of pressure distribution between pressure side and suction side is changing with different flow conditions, total pressure loss coefficient will decrease with increase of outlet Match number , secondary flow vector distribution will remain unchanged with outlet Match number, but the strength of secondary flow and passage vortex will decline with reduction of outlet Match number.

关 键 词：非轴对称端壁 环形叶栅 变工况 总压损失系数 

分 类 号：TK261[动力工程及工程热物理—动力机械及工程]