滑行艇纵向运动响应与静水航行数值模拟分析

运用CFD软件FLUENT,采用动网格技术,通过编制的运动预报程序求解耦合运动方程,比较滑行艇排水航行、过渡航行、滑行三种不同状态下航行姿态及周围流场情况,分析了滑行艇响应运动过程中重心位置及纵摇角度的变化,并展开对应工况下滑行艇以固定姿态不涉及动网格技术的静水直航数值模拟,将计算结果与运动响应结果比较分析.得出了滑行艇由排水航行状态过渡到滑行状态底部动压力变化.为关于滑行艇水动力性能的研究提供了可靠的计算研究模型.

Numerical Simulation and Analysis on Heave-pitch Coupled Motion Response and Motion in Calm Water of Planing Ship

Based on computational fluid dynamics software named FLUENT and dynamic mesh technology,heave-pitch coupled motion equations are solved using self-developed program.Comparison of surrounding flow field distribution and sailing motions at different conditions of displacement,transition and planing are given.Change curves of the center-of-gravity and the pitch angle during the motion response process are presented.Numerical simulation of planing ship sailing with a fixed motion without using dynamic mesh technology is carried out,which is compared with the results of motion response.It is obtained the change of the dynamic pressure on the bottom of planing ship during the process of sailing from displacement to planing.A reliable computational research model is provided for the study on hydrodynamic performance of planing ship.