变工况下非轴对称端壁环形叶栅流场特性实验

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.

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

Aerodynamic performance of two kinds of annular turbine cascade with non-axisymmetric 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 ch...