Study of Hydrodynamic Characteristics for Planing Craft in Regular Wave of Self-Navigation Mode

摘要

Based on the computational fluid dynamics software FINE/Marine numerical simulation is performed to study hydrodynamic characteristics of the high speed planning craft in self-navigation mode, where the wave height(H) is 0.2 meters and the value setfor wave lengths(λ) are 0.5L, 1L, 1.5L, 2L. According to the relation between planing craft's motion response and different wave periods, analysis of the distribution of pressure, velocity and water in the bottom of the boat was done. And the variation of the parameters such as lift, resistance, heave, pitch and wet area with wave period was studied. The results show that hydrodynamic characteristics of planing craft changes periodically with time, and the peak of the resistance reaches its maximum when the wave length is equal to the captain. The heave and pitch angles reach dynamic equilibrium, and the oscillation period is about the encounter period of planning craft in the wave. There is often a slamming phenomenon, the fluid from the bottom of the boat and diffuses toward the tail, can catch the obvious spray phenomenon. In addition, the FINE/Marine software is proved to be feasible for the numerical simulation of planing craft in regular waves, which provides the theoretical foundation for the later study of spray resistance of planing craft.