实验研究了低速条件下在端壁近吸力面处进行附面层吸除对某大转角扩压叶栅性能的影响。对叶栅出口截面参数和叶片型面静压进行了测量,并在叶片表面及端壁进行了墨迹流动显示。结果表明,端壁抽吸主要影响了吸力面/端壁角区,重新分配叶片根部负荷。在角区未发生分离的位置开始抽吸可有效推迟叶栅内的角区分离,降低损失,改善叶栅端区流动;而在角区已经发生分离的弦向位置开槽吸气则引起了局部回流,恶化了流场,增加了低能流体的掺混和气动损失。 The effect of suctioning at the near suction side of the end wall on the performance of a large-angle diffuser cascade under low speed is studied experimentally. The exit section parameters of cascade and the static pressure of blade profile were measured, and the ink flow was displayed on the blade surface and the end wall. The results show that the suction of the end wall mainly affects the suction surface / corner zone and redistribute the root load of the blade. Suction at the point where the separation of the corner does not occur effectively delays the separation of the angular zones within the cascade to reduce losses and improve the flow of the end regions of the cascade; Local reflux degrades the flow field and increases the mixing and aerodynamic losses of low energy fluids.