中文摘要：

在低速条件下实验研究了局部附面层吸除对高负荷扩压叶栅内流动特性的影响。实验对叶栅壁面进行了果迹流动显示，并采用五孔气动探针测量了叶栅出口截面参数，得到了该截面的二次流速度矢量分布。结果表明，吸力面两端附面层吸除能有效减小角区三维分离、抑制通道涡发展，而在吸力面中部抽吸不能有效抑制角区三维分离流动；在角区分离线起始位置后采用吸力面两端吸气方式时，吸气量越大流动改善的效果越好，其余方案时吸气量变化对流动影响较小。

英文摘要：

The effects of local boundary layer suction on the flow characteristic of highly-loaded compressor cascade in a low-speed situation were investigated experimentally. The ink-trace flow visualizations on the cascade surface were performed to show the boundary layer development. The distributions of the exit secondary flow vector and the exit aerodynamic parameters were measured by five-hole probe in detail. The results show that the end suction can restrain the corner separated flow, weaken the intensity and scale of passage vortex, while the middle suction can＇t effectively restrain the corner separated flow. When the local suction is performed behind the corner separated line, the effects of improvement are more obviously, and the change of suction flow rate has a little influence on the flow characteristic of other suction schemes.