三维扩压叶栅通道涡数值模拟

本文介绍了三维扩压叶栅通道涡的一种简单数值模拟方法,对椭圆方程采用抛物化处理后进行计算,简单、省机时省存贮。文中采用这种方法对一种近似扩压叶栅的特殊扩压管道进行了计算,旨在定性分析扩压叶栅的通道涡。叶栅通道涡由四部分组成,在直列静叶栅中吸力面根、顶部工作情况恶劣,对环形静叶栅通道吸力面根部情况最不好,因此改善静叶栅通道流动状况应主要解决吸力面根部的流动,而采用弯叶片是解决这一问题的重要手段之一。 

THE NUMERICAL SIMULATION AND ANALYSIS OF PASSAGE VORTICES IN 3-D COMPRESSOR CASCADE

A simplified numerical simulation method for calculating passage vortices in a compressor cascade is presented,which can reduce computer time and save computer storage.The calculation employs the parabolized N S equiation.In order to analyze and investigate the passage vortices in the compressor cascade,the calculation has been carried out for a divergent curved channel similar to compressor cascade.It can be seen from obtained results that the passage vortices are composed of four parts,the flow behaviour near the suction surface on the both end of the straight compressor stator is deteriorated severely.For this reason the application of curved blades to the compressor is one of important means for improving the end wall flow behaviour.