Experimental research of pulsation pressure and hydrodynamic noise at the bow of underwater vehicle

The design of the bow of the underwater vehicle affects its hydrodynamic performance, and a better design can reduce the direct impact of water on the bow and thus reduce the hydrodynamic noise of the underwater vehicle. In the towing pool, five models with different bow shapes were tested for the first time using pulsation pressure sensors and hydrophone to synchronize the pulsation pressure and hydrodynamic noise at different speeds and flow positions. The experiment results show that the velocity and bow shape have significant effects on the pulsation pressure and hydrodynamic noise. The higher the speed, the higher the instability of the fluid flow and the higher the intensity of the pulsation pressure; the bow shape has a critical value between "sharp" and "rounded", which makes the peak of the pulsation pressure most backward and shows a lower hydrodynamic noise.