中文摘要：

在进口马赫数Ma=0.67的高速平面扩压叶栅端壁采用射流旋涡发生器以控制其二次流动。数值模拟结果表明：射流旋涡可有效抑制端壁附面层横向迁移,增强端区与主流间的流体掺混,从而显著减弱角区低能流体堆积,推迟吸力面侧流动分离,减少栅内损失,增强气流折转能力。随着来流冲角的增加,栅内损失减小越明显,当i=4°,仅采用相当于叶栅进口流量0.2%的射流量,即可使得总压损失减小高达13%。

英文摘要：

A numerical investigation of secondary flow control by the use of end-wall vortex generator jet （VGJ） is conducted in a high speed liner compressor cascade with a Mach Number of Ma = 0.67. The results indicate that the induced vortex by the VGJ could suppress the end-wall cross flow and enhance the fluids mixing between the end-wall boundary layer and the mainstream effectively, thus weakening the low energy fluids accumulation in the corner region as well as the separation on the rear part of the suction surface. As a result, the loss is reduced and the ability of flow turning is increased significantly, which is more obvious with the increase of the incoming incidence. At i = 4°, a maximum loss reduction up to 13% is obtained with a jet-to-mainstream mass ratio of 0.2%.