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将附面层吸除技术应用于带间隙的高负荷压气机叶栅中,并在低速平面叶栅风洞里,实验研究了附面层吸除对带间隙的高负荷压气机叶栅流动特性的影响。实验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,并对叶栅壁面进行了墨迹流动显示。结果表明,采用恰当的附面层吸除设置可以大幅改善流动,降低损失;在吸力面附近和间隙内采用附面层吸除(本文的方案1、2和4)都将削弱间隙泄漏流动的动能,从而影响吸力面再附线和端壁分离线的长度和位置,达到对相应区域三维流动分离的控制,并大幅降低总损失,其中方案1的损失下降达到20.8%。
The application of the technique of surface layer suction to the high-load compressor cascade with clearance was studied. In the low-speed plane cascade wind tunnel, the flow characteristics of high load compressor cascade with gap clearance Impact. In the experiment, the parameters of exit section of cascade were measured by five-hole pneumatic probe, the distribution of the secondary flow velocity vector was obtained and the flow of ink was displayed on the wall of cascade. The results show that proper suction removal of the overburden can greatly improve the flow and reduce the loss. Adopting the suction near the suction surface and suction in the clearance (options 1, 2 and 4 in this paper) will weaken the gap leakage flow Kinetic energy, which affects the length and position of the suction line re-attachment line and the end wall separation line to achieve the control of the three-dimensional flow separation in the corresponding area, and greatly reduces the total loss. The loss of scheme 1 is reduced to 20.8%.