论文部分内容阅读
采用角区端壁射流控制某进口马赫数为Ma=0.67的高速平面扩压叶栅流动分离。研究了射流轴向位置和角度对叶栅气动性能的影响,结果表明:通过对角区内注入能量可有效减弱流道后部的流动分离,仅采用相当于主流流量0.6%的射流气体,可使得叶栅出口总压损失系数降低10.0%。位于角区内分离起始位置处的射流控制效果最佳;随着角度的增加,射流与来流间的冲击和掺混损失增大,近叶展中部的分离流动加剧,使得流动控制效果减弱。
A high-speed planar diffuser cascade with a Mach number of Mach = 0.67 is controlled by the end-zone jet of corner zone. The effects of axial position and angle of jet on the aerodynamic performance of cascade are studied. The results show that the injection of energy into the diagonal zone can effectively reduce the flow separation at the rear of the flow channel. Only the jet gas equivalent to 0.6% Making the cascade exit total pressure loss coefficient decreased by 10.0%. The control effect of the jet located at the starting point of separation is the best. With the increase of the angle, the impact and mixing loss between the jet and the incoming flow increases, and the separation flow in the middle of the near-leaf spreading aggravates, resulting in weakened flow control effect .