附面层抽吸对叶栅表面分离流动控制的实验研究

以某高亚声速叶栅风洞为实验平台,运用粒子成像测速仪(PIV)对平面叶栅吸力面进行了附面层抽吸试验研究。验证了附面层抽吸技术在附面层分离流动控制方面的可行性和有效性。通过与数值模拟结果的对比分析,验证了本试验测量结果的可靠性。通过对不同抽吸位置处抽吸效果的研究表明:在同一抽气量下,合适的抽吸位置是控制附面层分离的重要因素。当抽吸位置处于分离起始点与严重分离区之间时,附面层分离才能够得到明显的抑制,流场结构得到显著的改善。

Experimental investigation for suppression boundary layer separation on cascade surface by BLS

An experimental study of the boundary layer suction ( BLS) on a cascade suction surface by using the Particle Image Velocimetry (PIV) was carried out in a high subsonic cascade wind tunnel, and the BLS technique was proved to be feasible and effective on the boundary layer separation suppression. The experimental results are proved to be credible by compared with the numerical simulation results. And the experimental results also indicate that the appropriate BLS position is one of the important factors on the boundary layer separation suppression. When the BLS position is just in the region between the separation starting-point and the serious separation zone, the boundary layer separation can be suppressed and the flow field structure can be improved obviously.