Compression Corner Shock Wave/Boundary Layer Interaction Flow Control Based on Local Particles Injection

In order to explore the feasibility of the new flow control method of local particle injection in controlling the separation induced by shock wave/boundary layer interaction（SWBLI），in this paper，aiming at the 2D compression corner model，the numerical simulation method was used to explore the mechanism of controlling SWBLI-induced separation by local particle injection. The results show that the solid particles injected upstream of the separation zone will inject momentum into the low-velocity fluid near the wall，making the shape factor of the boundary layer smaller. At the same time，due to the relaxation effect of the particles behind the shock wave，the particles will also inject momentum to the fluid. Under the combined effect of the above two factors，the separation region’s size was significantly reduced. The current study also shows that the larger non-dimensional mass flow SL of the input particles（taking the boundary layer mass flow of the baseline case as a reference）and the smaller particle size Dp，the better control effect will be obtained. When using TiO2 particles with SL=0.12 and Dp=0.5μm for flow control，the non-dimensional streamwise distance between the separation point and the reattachment point reduces from 4.85 to 1.77，the latter is only 36.5% of the former，which shows the effectiveness of this method. © 2023 Journal of Propulsion Technology. All rights reserved.