超声速回转面叶栅栅前激波形状的计算

本文从基本方程出发,推导出回转面上特征线方程和特征相容关系的表达式。对西德DFVLR的单级跨声速实验压气机动叶的三个超声速截面进行了计算。计算表明:本方法能有效快速地算出回转面叶栅栅前脱体曲激波形状,并能同时求得超声进口区流场和唯一攻角。

COMPUTATION OF THE DETACHED SHOCK SHAPE IN A SUPERSONIC OR TRANSONIC CASCADE

A method is presented for determining the shape of the detached shock andthe fiowfield in the supersonic entrance region on an arbitrary stream surface of revolution. The e-quation of characteristics and the corresponding equation of compatibility are derived. The shape of the detached shock obtained is taken as the initial- value curve to calculate the fiowfield in the supersonic entrance region by means of the method of characteristics. As an application of the present method, three stream surface of revolution in a transonic compressor roto have been calculated. The results show that the method is effective and useful to determine rapidly the shape of the detached shock wave as well as the fiowfield parameters in the supersonic entrance region. including the unique incidence angle in a supersonic or transonic compressor blade row.