Propagation of sound generated by weak shock–vortex interaction

The basic nature of sound generated by the interaction between a single vortex and a shock wave is studied numerically. Special attention is paid to the propagation process of the sound from near to far fields. The results show that the generation of sound is closely related to the generation of reflected shock waves, and that the sound waves are generated three times, basically. A stronger vortex produces a stronger reflected shock wave, resulting in the generation of additional pressure waves.