论文部分内容阅读
S形进气道存在严重的流动分离及二次流现象,导致进气道出口总压恢复系数低、流场畸变严重.由于二次流的存在,进气道内流场三维性较强,常规的在展向或周向施加等量的控制针对性并不强,本文在矩形进气道模型上游弯道流动分离处不同展向位置施加等强度的合成射流控制,研究不同展向位置对控制效果的影响.首先对进气道内流动分离和二次流的相互作用进行了分析,发现在进气道展向不同位置二次流可能会抑制或加强流动分离,流动分离也会使二次涡加强,导致出口局部区域压力恢复非常低.在展向不同位置施加控制,可通过改善展向不同区域流动分离来产生不同旋转方向的流向旋流和二次流相互作用,降低二次流的强度,获得较高的总压恢复.
S-shaped inlet there is a serious flow separation and secondary flow phenomenon, resulting in the outlet of the inlet total pressure recovery coefficient is low, the flow distortion. Due to the presence of secondary flow, inlet three-dimensional flow field is strong, conventional Is not strong enough to apply the same amount of control in the span direction or the circumferential direction. In this paper, a synthetic jet control with equal intensity is applied to different positions in the upstream curved flow separation of the rectangular inlet model, Effect.Firstly, the interaction between the flow separation and the secondary flow in the inlet is analyzed and it is found that the secondary flow at different positions of the inlet can inhibit or strengthen the flow separation, and the flow separation also makes the secondary vortex Resulting in a very low local pressure recovery at export.When applying control to different locations in the exhibition, flow-direction swirling and secondary flow interaction in different rotation directions can be produced by improving the flow separation to different regions so as to reduce the intensity of the secondary flow , Get a higher total pressure recovery.