气固两相压气机平面叶栅表面压力分布的试验研究

EXPERIMENTAL INVESTIGATION ON EFFECT OF SOLID PARTICLES ON BLADE PRESSURE DISTRIBUTION IN COMPRESSOR CASCADE FLOW

试验研究了气固两相流流过压气机平面叶栅时 ,叶栅表面压力分布随粒子浓度、叶栅进口气流速度和冲角改变而变化的规律。结果表明 :随着粒子浓度、气流速度升高 ,叶栅表面的气相与纯气流的压力之间的差别增大 ;冲角不同叶栅表面的气相相对纯气流的压力系数变化规律不同。文中还对栅后沿栅距分布的气流速度进行了测量 ,发现气相速度在叶片附近不同于纯气流速度。

The blade pressure distribution of gas particle two phase flow in a compressor cascade has been investigated experimentally.Detailed measurements were made for three mass concentrations 1 1%,2 0% and 4 5%,and for two inlet velocities 10 and 22m/s,and for two inlet angles of attack 7° and 27 5°.The results for two inlet angles of attack 7° and 27 5° indicate that the solid phase has certain effect on the blade pressure distribution of the gas phase .With increasing inlet velocity and mass concentration,the effects of solid particles on the blade pressure distribution are enhanced and wake deviation is obvious.Also,the variation of the effects depends on the inlet angle of attack.