某水下机器人阻力特性的数值模拟  

Numerical simulation of the resistance character of an underwater vehicle

作　　者：白航 王伟竹 姚清河[1] 

机构地区：[1]中山大学应用力学与工程系,广东广州510275

出　　处：《中山大学学报（自然科学版）》2018年第1期150-159,共10页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金(11572356);NSFC-广东联合基金(NSFC2015-582)

摘　　要：利用计算流体动力学(CFD)方法,对特定深孔有压隧洞环境下某类型水下机器人的阻力特性进行了研究。首先,对Suboff标准模型进行了模拟计算,计算结果与国际拖曳水池会议(ITTC)公布的试验数据基本吻合,验证了所用方法的适用性。然后,对两种不同支撑结构的机器人模型进行了计算,讨论了两种支撑结构对水下器人的阻力和表面压强的影响。最后,对不同工况下机器人的阻力特性和周围流场进行了分析。结果表明:与板件支撑结构相比,杆件支撑结构可以减小阻力和降低表面压强在不同工况时的波动程度;两种前端支撑结构模型在不同工况下的阻力和表面压强变化趋势相同,顺流行驶时阻力随着航行速度的增大而减小,而逆流行驶时阻力则随着航速增大而增大。In this work, the computational fluid dynamics（CFD） method is used to study the resistance character of an underwater vehicle in a specific undersea tunnel circumstance. In order to prove the validity of the proposed method, the standard Suboff model was numerically calculated and the simulation results were in agreement with the experimental data published by ITTC. This work presents different effects of resistance and pressure on two front supporting structures with the simulation results of the two different models. The flow field around the vehicle and the resistance characteristics changing under different working conditions were analyzed. The results show that the bar supporting structure can reduce the resistance and surface pressure fluctuation compared with the board model and the trend of resistance and pressure changes under different working conditions is different. In the downstream direction, the resistance decreases with the increase of navigation speed, where in the upstream direction it goes by contraries.

关 键 词：水下机器人 阻力特性 支撑结构 海底隧洞 数值模拟 

分 类 号：TV672[水利工程—水利水电工程]