Numerical Simulation of the Flow Field Characteristics of Low Speed Oblique Water Entry of Revolution Body

The numerical simulation of oblique water-entry of a revolution body at low speed was performed. Finite volume method was introduced to solve the Navier-Stokes equations, and VOF (volume of fluid) and dynamic mesh method were used for the multiphase flow and the movement of the water-entry revolution body. The effectiveness of the numerical method was verified by comparison between numerical and experimental results. Based on this method, the flow field characteristics during the oblique water entry of the revolution body with different head forms at low speed were analyzed. Results show that in the same water depth, the diameters of the water-entry cavity and the minimum pressure in the flow field are larger as the cone angle of the head increases. For the revolution body with different head forms, the pressure at the same position of the the generatrix increases with larger cone angle of the head. When the angle of the cone head is larger,the pressure coefficient of the revolution body gets larger, and the velocity attenuation gets faster.