Sound source calculation method, calculation device and computer readable storage medium

The invention relates to a sound source prediction method, a computing device and a computer readable storage medium. The sound source calculation method comprises the steps that a, unsteady flow of the turbomachinery in a channel is simulated, and an unsteady flow field calculation result is obtained; b, a plurality of calculation sections of a plurality of axial positions are selected for the channel according to the calculation result of the step a, a first axial distance is formed between the calculation sections, and the sound pressure levels of the calculation sections are located in an error band; calculation input data of the plurality of calculation sections is extracted, wherein the calculation input data comprises an average mainstream flow parameter, an array coordinate and an array numerical value under each order of harmonic wave; the method also includes: c, performing modal decomposition according to the calculation input data of the channel extracted in the step b to obtain acoustic modal dat