Numerical Simulation of Wake Magnetic Field in Pitch Motion of an Underwater Vehicle

Abstract

The underwater vehicle produces a complex hydrodynamic wake during its mission, which will generate the induced magnetic field. With the development of acoustic stealth technology for underwater vehicles, the wake-induced magnetic field is of great significance to detecting and tracking underwater vehicles. This paper combines the numerical simulation of the wake flow field and magnetic field. The magnetic field of the wake during the motion of the underwater vehicle is numerically simulated by using dynamic overlapping mesh technology. The results show that a strong magnetic field centered on the shedding vortex is formed at the wake during the floating movement of the underwater vehicle. With an increase in pitch movement time, the strength and range of the wake magnetic field gradually increase. The vertical range of the wake magnetic field is obviously affected by the upward trim angle, but the horizontal range is basically not affected. The range and strength of the wake magnetic field increase when the upward trim angle increases.