后加载叶型叶栅的拓扑与旋涡结构

Topology Vortex Structure of Turbine Cascades with Aft-Loaded Profile

在不同来流条件下对具有后部加载叶型的环形静叶栅的壁面采用墨迹显示技术,依靠拓扑学中相关的判别准则并结合空气动力学中的基本概念和基本规律,对流动显示图片进行了分析,给出了本文所研究的涡轮叶栅壁面和两个典型横截面的拓扑结构,并由此描绘了该叶栅内的二次流旋涡结构,为同类叶栅的研究提供了参考。

The present paper uses the ink trace visualization technique in annular static cascades with aft-loaded profile at different inlet conditions. By means of the topological rules and the based concepts of aerodynamics, the flow visualization pictures are analyzed. It also gives the topological structure on the endwalls and two typical transverse sections of the turbine cascade, and then describes the secondary flow vortex structure, which may be useful for studying the similar cascade.