动叶尾迹对静子非定常气动性能影响的研究

本文利用南京航空航天大学单级低速轴流压气机试验器，对动叶尾迹对静子非定常气动性能的影响开展了系统的实验研究。通过静叶表面动态压力分布的测量，获得了在不同的动—静叶排轴向间距、不同的工作转速和不同的工作流量下，动叶尾迹对静子非定常气动性能影响的大量基础实验数据

AN EXPERIMENTAL INVESTIGATION ON COMPRESSOR ROTOR-STATOR INTERACTION

An experimental investigation on the effect of the rotor wake on unsteady loading of downstream stator has been carried out in a low speed single stage axial compressor.The unsteady pressure distribution along the stator blade was measured,and the effects of axial gap between rotor and stator,operating rotation speed and mass flow of the compressor were investigated in detail.The experimental results show that all these factors have a great effect on the rotor-stator interaction.The incidence change caused by the velocity defect in the rotor wake has a major impact on the unsteady pressure distribution and lift of the stator blade.The amplitude of the pressure fluctuation reaches maximum at the blade leading edge and decays rapidly towards the trailing edge on the pressure side.The interaction intensifies with the decrease in the mass flow or the increase in the rotation speed.The results of the investigation on the influence of axial gap between rotor and stator ( ) show that,the unsteady pressure distribution and the lift of the stator blade fluctuate strongly as <0 4,and the fluctuation intensity decreases quickly as increasses.