对具有大转角的常规直叶片、正弯与反弯叶片的三套大尺寸、低展弦比的矩形叶栅进行了低速风洞实验,详细测量了栅前三个、栅内六个和栅后一个轴向垂直面内的气动参数.实验结果表明,与常规直叶片相比,叶片的反弯曲削弱了马蹄涡和通道涡的强度,并抑制通道涡向叶栅中部发展,从而避免了上、下通道涡的汇合.因此,反弯叶片叶栅中的二次旋涡损失显著降低,流动特性大为改善. Three sets of large-scale, low-aspect ratio rectangular cascades with large straight corners, normal straight blades and reverse curved blades were tested by low-speed wind tunnel. The three front grids, six grids and the gate The aerodynamic parameters in the latter axial vertical plane.The experimental results show that the anti-bending of the blades weakens the strength of the horseshoe vortex and the passage vortex and inhibits the development of the passage vortex towards the middle of the cascade blade compared with the conventional straight blade, , The merger of the lower vortex.As a result, the secondary vortex loss in the inversely curved blade cascade is significantly reduced and the flow characteristics are greatly improved.