高速滑行艇静水中纵向运动尾流特性的数值分析

Numerical analysis of the flow field characteristics of high-speed planing craft longitudinal motion on calm water

基于计算流体力学软件FINE/MARINE,利用其六自由度运动响应模块,开展了三维滑行艇模型在静水中航行纵向三自由度运动响应的实时数值预报.完成了航速v=2~15 m/s共计14种工况下滑行艇水动力特性、运动响应特性与航速之间的关系,与试验数据对比,二者吻合良好,并给出了对应的变化规律.定量分析了滑行艇尾压力兴波的凯尔文角、船尾空穴的长度和深度、流体与艇尾分离点与航速的关系.为滑行艇运动响应的实时数值预报和尾流场的分析提供了一种有效的方法.

Based on computational fluid dynamics software FINE/MARINE, calling its six-degree-of-freedom motion response module, a real-time numerical prediction of three-degree-of-freedom longitudinal motion response of the 3D planning craft model sailing on calm water was presented. The relationship between speed, the hydrodynamic characteristic and motion response characteristic of the planning craft was analyzed under 14 working conditions with speed varying from 2m/s to 15m/s. The results are in good agreement with the experi-mental data. Quantitative analysis was completed of the relationship between speed and Kelvin angle of the tail pressure wave, length and depth of the hole in the stem, fluid and boat tail separation point. It provides an ef-fective method for real-time numerical prediction and flow field analysis of planing craft motion response.