非光滑叶片对叶栅出口流向涡系的影响

Effects of Non-Smooth Blades on the Cascade Exit Streamwise Vortex Systems

在低速平面叶栅风洞中对光滑叶片及非光滑叶片叶栅进行了实验研究 ,在叶栅出口进行了详细的测量 ,通过测量结果的对比分析 ,探讨非光滑叶片对叶栅出口流向涡系的影响。实验结果表明 ,与光滑叶片相比 ,非光滑叶片对叶栅出口流向涡系中 ,通道涡在节距方向上移向叶栅通道中心处 ,强度几乎不变 ,尾缘涡发生展向扩展并分裂 ,强度明显减弱。

An experimental investigation on the cascades equipped with conventional smooth blades and non-smooth blades was carried out in the low speed plane cascade wind tunnel, so as to study the effects of non-smooth blades on the exit streamwise vortex systems. The experimental results show that the non-smooth blades exert a distinct influence on the exit streamwise vortex systems. The locations of the passage vortex and trailing vortex shift toward the centre of cascade passage, and the intensity of the trailing vortex weakens.