高速船航态模拟与阻力预报CFD方法应用

Navigation State Simulation and Resistance Prediction of High Speed Vessels Based on CFD Simulation

中高速船在航行状态下,其航态与低速航行相比有较大的不同,对船舶的阻力有明显的影响。因此,此类船舶的阻力预报必须考虑船舶航行姿态的影响。现有公开发表的关于滑行艇垂向+纵向运动理论预报研究的资料不多见。基于Flu-ent平台对三维船体航态对阻力的影响进行研究,采用动网格技术模拟船舶的航态;同时,为了保证计算的连续性与稳定性,利用FLUENT二次开发平台,编写UDF程序,在离散的时间域内根据船体的受力对船舶运动进行干涉。计算结果表明该方法对船舶的水动力预报问题具有可行性。

Compared with the low-speed boat,high-speed boat’s navigation state is quite different.It has significant impaction on the ship’s resistance.The resistance prediction of such a vessel must consider the ship’s navigation state.Little information on the planning craft vertical and longitudinal movement theory prediction can be found.Here,the dynamic mesh is used to simulate ship navigation state.Meanwhile,in order to ensure the calculation continuity and stability,in discrete time domain.UDF was used to control the ship motion,according to the force of the hull.This study is based on the FLUENT platform to calculate the three-dimensional hull resistance with the consideration of the navigation state.The calculation results show that this method of ship hydrodynamic prediction is feasible.