Aerodynamic noise calculation method

The invention discloses an aerodynamic noise calculation method. The method comprises the following steps: giving parameters of jet flow at an outlet of a spray pipe; determining a target fluid domain and dividing grid units; performing simulation calculation on the target fluid domain to obtain a stable flow field; solving a characteristic value and a characteristic function of inlet disturbance of the target fluid domain by adopting a linear stability model; the inlet disturbance is used as an inlet boundary condition, and a parabolic stability model is adopted to carry out propelling solving on disturbance waves in the flow direction; and according to the disturbance solution of the target fluid domain, an acoustic integral theoretical model is adopted to calculate a sound source function and a sound pressure value of any position of a sound field. The method can accurately describe the sound source information, saves the calculation cost of noise prediction, and improves the calculation efficiency. 本发明公开了