不同间距和航速下水下航行体近场运动UUV受力分析

Mechanical analysis of the UUV operating near the underwater vehicle at different speeds and lateral distance

为探究不同侧向间距和航速下水下航行体绕流流场对UUV的流体动力干扰规律,以实尺度水下航行体和UUV模型为研究对象,通过数值求解RANS方程,基于重叠网格方法进行水下航行体近场运动UUV的非定常和定常数值模拟研究。首先,简要分析不同侧向间距和航速下UUV作匀速直线运动时轴向力、侧向力和偏航力矩系数随轴向位置的变化规律,在此基础上进一步探讨侧向间距和航速对UUV受力规律的影响并分析二者影响作用的大小。结果表明,对于轴向力,航速和侧向间距均表现出明显的影响,航速的影响作用要略大于侧向间距;而对于侧向力和偏航力矩,侧向间距的影响要远大于航速,航速的影响作用基本可以忽略。

In order to explore the hydrodynamic influence of the underwater vehicle's flow fields on UUV at different lateral distance and speeds,the unsteady and steady numerical simulation of the UUV operating in the near fields of under-water vehicle was carried out by solving the RANS equation numerically with the real scale model.Firstly,a brief analysis was conducted on the variation of axial force,lateral force,and yaw moment coefficients with the axial position of a UUV operating parallel to an underwater vehicle in a uniform linear motion at different lateral distance and speeds.Based on this,the influence of lateral distance and speeds on the force of UUV was further explored,and the magnitude of their influence was analyzed.The results indicate that for axial forces,both speeds and lateral distance have a significant impact,with the ef-fect of speeds slightly greater than that of lateral distance;but for lateral forces and yaw moments,the influence of lateral dis-tance is much greater than that of speeds,and the effect of speeds can be basically ignored.