论文部分内容阅读
通过采用五孔探针在低速平面风洞上测量压气机叶栅流场的方法,研究了不同高度和周向位置的端壁翼刀对叶栅能量损失及二次流速度矢量的影响.结果表明,使叶栅总损失降低的最佳周向安装位置是距离吸力面70%相对节距处,最佳翼刀高度为5 mm;存在使叶栅总损失降低的极限翼刀高度.当翼刀高度增加时,翼刀涡更加清晰.安装翼刀可以改变叶栅端壁损失的分布,进而控制吸力面/端壁角区的流动,改善叶栅的气动性能.
The method of measuring the flow field of compressor cascade on a low-speed planar wind tunnel by five-hole probe was used to study the influence of endwall wing blades with different height and circumferential position on cascade energy loss and secondary flow velocity vector.Results Shows that the optimum circumferential position for reducing the total loss of the cascade is 70% of the relative pitch from the suction side and the optimum blade height is 5 mm. There is an ultimate height of the blade which reduces the total loss of the cascade, When the height of the knife is increased, the wing vortex is more clear. The installation of the wing vane can change the distribution of the loss of the vane end wall, and then control the flow of the suction surface / end wall corner zone and improve the aerodynamic performance of the vane.