【摘要】 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%.更多还原

【Abstract】 A numerical study was conducted to investigate synthetic jet-based boundary layer separation control in a serpentine inlet.Rectangular slots were chosen in this study,spanwise and streamwise orientations of these slots were discussed in detail.The results illustrate streamwise oriented synthetic jet has a higher resistance to the adverse pressure gradient.It penetrates deeper and exhibites stronger persistence than spanwise case as well.When jet momentum coefficient is equal to 1.62×10-3,and the characteristic frequency is 1,separation length is reduced by 38.39%relative to uncontrolled flow field.The performance of serpentime inlet using streamwise oriented synthetic jet are also superior to spanwise case.Outlet pressure coefficient is increased by 158.91%;total pressure recovery coefficient is increased by 0.71%,and total pressure distortion coefficient is reduced by 56.75%.更多还原