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对合成射流控制一种S形进气道边界层分离进行了数值研究.选用狭缝出口的合成射流,详细讨论了展向和流向两种布局对控制效应的影响.结果显示:流向布局相对展向布局具有抗逆压梯度强、穿透深、控制效果持久等特点,在射流动量系数为1.62×10-3,特征频率等于1的工况下,其分离区长度缩减了38.39%.流向布局对S形进气道性能的提升也更显著,出口压力系数比无控制时提高158.91%,总压恢复系数提高0.71%,总压畸变指数降低56.75%.
The numerical simulation of a S-shaped inlet boundary layer separation is carried out by using a synthetic jet with a slit outlet. The effect of the two orientations and the flow direction on the control effect is discussed in detail. The results show that: With the characteristics of strong anti-stress gradient, deep penetration and long lasting control effect, the length of the separation zone is reduced by 38.39% under the condition that the jet momentum coefficient is 1.62 × 10-3 and the characteristic frequency is equal to 1. Flow direction The performance of the S-shaped inlet is also significantly improved. The outlet pressure coefficient is increased by 158.91% compared with that without control. The total pressure recovery coefficient is improved by 0.71% and the total pressure distortion index is decreased by 56.75%.