Method for designing ultrasonic-speed turning flow channel

The invention provides a method for designing an ultrasonic-speed turning flow channel. The method comprises the following steps of: determining the inlet boundary of the wall surface curve of the ultrasonic-speed flow channel according to the geometric constraint of the design structure of the ultrasonic-speed flow channel; determining the one-sided wall surface curve of the ultrasonic-speed flow channel according to the geometric constraint of the design structure of the ultrasonic-speed flow channel; determining the opposite-side wall surface curve which corresponds to the one-sided wall surface curve by adopting the method of characteristics; and determining the wall surface curve of the ultrasonic-speed flow channel according to the parameters of an outlet flow field. Due to the adoption of the method, the shock-free ultrasonic-speed flow channel of the whole flow field can be obtained, and a better flow field environment can be provided for the aerodynamic and structural design of an ultrasonic-speed wind tunnel, an ultrasonic-speed ejector and an ultrasonic-speed aircraft.