Experimental and Simulation Research on Flow Noise of Underwater High Speed Vehicles

In this paper, the mechanism and characteristics of underwater high-speed vehicle flow noise are studied by experimental and simulation methods. The experiment was carried out in a gravity-type low-noise water tunnel of Harbin Engineering University. The radiation noise of the model under multiple incoming flow velocities was measured. At the same time, combined with the PIV particle tracing technology, the sound position and mechanism of underwater targets were further explored. Then establish the same model through CATIA and use ANSYS software to establish the flow field and sound field calculation models respectively, and simulate the flow noise of the model at different flow speeds. Finally, the experimental data and the simulation data are compared and analyzed. The results show the flow noise of the target increases with the increase of the flow velocity, and the turbulent velocity and pulsating pressure at the head of the model are higher, followed by the tail, and the convective noise in the middle section contributes less.