平面大头叶栅跨声速流动的一种有效解法

准确数值预估叶片头部表面的压力分布,一直是叶片气膜冷却设计中十分重要而又尚未圆满解决的问题。本文针对这个问题提出了一个高准确度、高效率的计算方法。 在文献1]的基础上,本文从任意正交曲线坐标系中的基本方程出发,引入Von Misses变换,导出了相应的流线控制方程,并具体地在拟边界层坐标系中计算了RA叶栅流场,结果与实验符合甚好,据作者所知,本文方法是已见到的计算同类叶栅方法中准确度最高、花费机时最少的。

AN EFFICIENT METHOD FOR SOLVING TRANSONIC FLOW ABOUT PLANE CASCADES WITH A LARGE NOSING

This paper proposes an efficient numerical method predicting exactly the pressure distribution on the blade surfaces, especially in the nosing region. Reforming the aerodynamic equations from an arbitrary normal curve coordinate system into von Misses one, the streamline governing equation is obtained, and solved efficiently in a quasi-boundary-layer-coordinate system with line-relaxation method. The numerical results of RA blades agree well with the experiment and show that, among all the methods, to our knowledge, the present one has the best accuracy and takes the least CPU time.