应用Beam -Warming近似隐式因子分解格式以及MML代数湍流模型 ,采用拟压缩性方法求解雷诺平均拟压缩N -S方程组 ,对正倾斜叶片压气机叶栅内三维粘性流场进行了数值研究 ,并与直叶栅进行了对照。结果发现 ,正倾斜叶栅中上、下通道涡的发生、发展过程与直叶栅存在明显的差异 ,这导致正倾斜侧二次流减弱 ,负倾斜侧二次流高损失区扩大 ,流动状况恶化 ,叶栅顶部区域的附面层分离发展成一个向叶栅中部扩展的更大的区域。计算与实验结果比较 ,两者吻合较好 The Beam-Warming approximate implicit factorization format and the MML algebraic turbulence model are applied to solve the Reynolds-averaged quasi-contractile N-S equations by using the quasi-compressive method. The three-dimensional viscous flow field in a positive rake blade compressor cascade is numerically studied. And compared with the straight cascade. The results show that the occurrence and development of vortices in the upper and lower channels in the inclined cascades are obviously different from those in the direct cascades, which leads to the weakening of the secondary flow in the positive inclined side and the enlargement of the high loss zone of the secondary flow in the negative inclined side, Deterioration, the separation of the top layer of the cascade develops into a larger area extending to the middle of the cascade. Calculation and experimental results, the two agree well