通过由常规直叶片、正弯曲叶片、反弯曲叶片组成的三种矩型扩压叶栅在低速风洞上的实验研究 ,测量了叶栅出口流场 ,研究了零冲角下常规直叶栅、正弯曲叶栅、反弯曲叶栅对出口总压损失分布情况和二次流速度矢量场的影响 ,讨论了叶片弯曲对扩压叶栅出口流场的改善作用 The flow field at the exit of the cascade was measured by three kinds of rectangular compressor cascades composed of conventional straight blades, positive curved blades and reverse curved blades on a low speed wind tunnel. The effects of conventional straight cascades , The effect of the curved blade and the anti-bending cascade on the distribution of the total pressure loss and the velocity field of the secondary flow, and the effect of the blade bending on the flow field at the exit of the expansion cascade is discussed