Optimization Design and Flow Control of Bump Inlet

For a bump inlet with a thick boundary layer in front of the inlet and a limited inlet height, the ability of bump to remove the boundary layer is limited. To obtain an inlet with a high total pressure recovery coefficient and low distortion, a serpentine diffuser is used to improve the flow field at the outlet. Then, a spoiler blade is used to eliminate the low pressure zone. In order to further improve the total pressure recovery coefficient of the inlet, a discharge slot is opened above the bump to relieve some of the low energy flow in front of the inlet. Through the combination of these two flow control methods, compared to the inlet without flow control, the total pressure recovery coefficient of the inlet is increased by 0.0262, and the steady-state distortion coefficient is reduced by 0.0076.