中文摘要：

为研究不同高度的吸力面翼刀对压气机环形叶栅流场结构及性能的影响,采用三维定常N-S方程和Realizablek-ε湍流模型,对CDA环形叶栅和同一叶展位置安装的4种不同高度吸力面翼刀的叶栅三维黏性流场进行数值模拟.结果表明：加装吸力面翼刀后,各方案叶栅端壁附近周向压力梯度减小,二次流动得到有效控制.各翼刀方案的叶展中部流动状况均较原型叶栅改善,分离线高度均显著降低.叶栅能量损失系数随吸力面翼刀高度的增加先减小后增大,在计算范围内,吸力面翼刀高度为3.3 mm的方案可较好控制环形叶栅内的二次流动.

英文摘要：

To investigate the influence of suction surface fence height on annual compressor cascade flow field structure and performance,the three dimensional stationary Navier-Stokes equations and the Realizable k-ε turbulent model were adopted to simulate numerically the flow field in an annual controlled diffusion airfoils（CDA） compressor cascade with 4 kinds suction surface fence heights. Results show that the circumferential pressure gradients decrease in all cases with suction surface fences,and the secondary flow are controlled effectively.All the flows near the middle of blade height with fences are better than that without fences,and all the separated lines in the cascades are reduced obviously.The cascade loss decrease firstly and then increase with the suction surface fence height increasing.The case with fence height of 3.3 mm can control the secondary flow better than other cases in annual compressor cascade.