The inlet design calculating model was set up based on the theory of equal shock wave intensity and angle of supersonic airflow to get maximum total pressure coefficient.

Changes of sidewall sweep Angle and cowl position can influence inlet performance such as mass capture, total pressure recovery coefficient and uniformity of isolator exit flow field.

And three-dimensional sidewall compression inlet with 25 percent cowl position has high mass capture and total pressure recovery coefficient and isolator exit flow flied is homogeneous.