关键词: 旋转失速, 流场, 测量

Abstract: With the help of the hot film probe and a three-hole probe containing fast response transducers in association with a digital data acquisition and processing system, the flow measurements during stall in an isolated rotor are obtained. The relation between the number and speed of stall cells and the circumferential stalled region and the main geometric parameters of cascade is described. The experimental results indicate that firstly, the rate of circumferential variation for aerodynamic parameters of airflow passing the cascade becomes smoother as the stagger is increased or the solidity decreased and secondly, there is complex mass transport between the stalled and unstalled parts of the flow. It is confirmed by the latter that the fluid must cross from one side of the cell to the other in the tangential direction.

Key words: rotating stall, flow field, measurement