DFVLR压气机转子三维跨声速位流中两类相对流面形态的计算与分析

本文基于吴仲华教授提出的两类相对流面的理论,使用沿速度矢量积分的方法,求得DFVLR压气机转子含激波三维跨声速位流中两类相对流面簇的形态。文中还对流面形态与其上流动的关系、S_1流面的翘曲与过激波时流线的折转情况等进行了分析和探讨。

COMPUTATION AND ANALYSIS OF THE SHAPES OF S_1 AND S_2 STREAMSURFACES IN A TRANSONIC COMPRESSOR ROTOR

Based on Wu's streamsurface theory and a solved 3D transonic flowfield of an axial-flow compressor rotor, a method to com-pute 3D streamlines and streamsurfaces in the flowfield has been pro-posed. The shapes of S1 and S2 streamsurfaces have been computed and shown by figures. With these figures, the 3D effects of transonic flow in turbomachinery have been analyzed. The computation and analysis made in this paper show that there are strong interactions within the flows in the subsonic and the supersonic streamtubes in the flowfield of tur-bomachinery, which make streamsurfaces twisting and lead to the departure of the quasi-3D calculations from the fully-3D calculation.