Study on the effect of wall slotting on boundary layer separation in hypersonic inlet

Taking 2-D hypersonic inlet GK01 as the computational model, inviscid and viscous calculations, as well as boundary layer separation control method on the inlet were numerically studied. The results showed that, the measure of slotting designed in the paper can effectively reduce or even eliminate the boundary layer separation phenomenon induced by shock/boundary layer interaction and decrease the negative effects of viscous effects. Before adopting measure relatively, the slotting can significantly improve the inlet total pressure recovery coefficient and kinetic energy efficiency at design and off-design point, while has little effect on mass capture coefficient. Meanwhile, the effect of slotting on the inlet's performance index at the off-design point is given in this paper.