Supersonic air intake duct and wall face determination method of supersonic air intake duct

The invention provides a supersonic air intake duct and a wall face determination method of the supersonic air intake duct. The wall face determination method of the supersonic air intake duct comprises the steps of: determining a front body wall face curve of the supersonic air intake duct according to geometric constraint of structural design of the supersonic air intake duct and by adopting a characteristics method; determining an outer compression wall face curve of the supersonic air intake duct according to an outer contraction ratio and by adopting a second-order continuous curve; determining a lip opening compression curve, a single side wall face curve and an opposite side wall face curve of the supersonic air intake duct according to geometric constraint of structural design of the supersonic air intake duct and by adopting the characteristics method; determining a lower wall face of the supersonic air intake duct according to the front body wall face curve, the outer compression wall face curve and the single side wall face curve; and determining an upper wall face of the supersonic air intake duct according to the lip opening compression curve and the opposite side wall face curve. The supersonic air intake duct determined according to the method is suitable for uneven incoming flow, isentropic compression and shock wave compression of the supersonic air intake duct can be distributed within a certain range through adjusting shock wave shapes, and further total pressure recovery capability can be improved.