动静叶栅优化改型及其性能分析

本文对动静叶栅分别进行优化改型,并对改型前后叶栅的气动性能进行数值分析。动静叶栅的优化改型基于正反问题相结合的流函数方法,性能分析一方面基于单排叶栅定常粘性流动的数值计算,另一方面基于动静叶栅相互干扰非定常粘性流动的数值计算。算例结果表明,经过优化改型后的动静叶栅的气动性能,无论在定常流动条件下还是在非定常流动条件下,相比改型前均有较大幅度的改善。

OPTIMIZATION AND PERFORMANCE ANALYSIS OF STATOR AND ROTOR CASCADES

In this paper, the shape of stator and rotor cascades was improved and the aerodynamic performance before and after improving was analyzed. The optimization of stator and rotor cascades is based on stream function method of combining direct problem with inverse problem. The performance analysis is on the one hand based on the numerical calculation of steady viscous flow for alone row of cascade, and on the other hand based on the numerical calculation of unsteady viscous flow for the stator/rotor interaction. The computed results show that the stator and rotor cascades optimized by inverse problem method have better aerodynamic performance not only under the condition of steady flow, but also under the condition of unsteady flow.