小型无人船阻力CFD模拟方法

CFD simulation method on resistance of small unmanned ship

该文基于SolidWorks设计某无人船外型结构,建立无人船水动力学CFD模型,研究吃水深度、航速及流速方向等因素对船体流动阻力的影响。结果表明:吃水深度从4 cm增加到16 cm时,船舶速度减小,压力增大,所受到的水动力阻力从0.25 N增加到4.58 N;船舶航速在0.25～1.25 m/s时,压力和阻力无明显变化, 1.25～2 m/s时,阻力从2.07 N急剧增加到66.90 N;航速与水速夹角从0增大至90°时,速度减小,压力先增后减,阻力不断增大。该研究可为无人船的航线规划及安全航行的控制提供参考。

In this paper,the outline structure of an unmanned ship is designed based on SolidWorks and its hydrodynamic CFD model is established,in order to study the effects of draft depth,speed and direction of flow on hull flow characteristics.The results show that,when the draft depth increases from4cm to16cm,the ship speed decreases and the pressure increases,and the hydrodynamic resistance increases from0.25N to4.58N.When the speed of a ship is0.25-1.25m/s,the pressure and resistance do not change significantly,while the speed is1.25-2m/s,the resistance increases sharply from2.07N to66.90N.When the angle between ship speed and water speed increases from0to90degrees,the speed decreases,the pressure increases firstly and then decreases at45degrees,and the resistance increases continuously.This study can provide reference for route planning and safe navigation control of unmanned ships.