﻿ 不同间距和航速下水下航行体近场运动UUV受力分析
 舰船科学技术  2024, Vol. 46 Issue (12): 97-101    DOI: 10.3404/j.issn.1672-7649.2024.12.017 PDF

1. 中国船舶科学研究中心，江苏 无锡 214082;
2. 水动力学全国重点实验室，江苏 无锡 214082

Mechanical analysis of the UUV operating near the underwater vehicle at different speeds and lateral distance
REN Mengchen1, LI Yongcheng1,2, WANG Xiaoqing1,2, ZHAO Qiaosheng1,2, YAO Huizhi1,2
1. China Ship Scientific Research Center, Wuxi 214082, China;
2. State Key Laboratory of Hydrodynamics, Wuxi 214082, China
Abstract: 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 underwater 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 effect of speeds slightly greater than that of lateral distance; but for lateral forces and yaw moments, the influence of lateral distance is much greater than that of speeds, and the effect of speeds can be basically ignored.
Key words: underwater vehicle     UUV     hydrodynamic
0 引　言

1 理论基础 1.1 流动控制方程

 $\frac{\partial {\overline{u}}_{i}}{\partial {x}_{i}}=0 ,$ (1)
 $\rho \frac{\partial {\overline{u}}_{i}}{\partial t}+\rho \frac{\partial {\overline{u}}_{i}{\overline{u}}_{j}}{{x}_{j}}=\rho {f}_{i}-\frac{\partial \overline{p}}{\partial {x}_{i}}+\frac{\partial }{{x}_{j}}\left(\mu \frac{\partial {\overline{u}}_{i}}{\partial {x}_{j}}-\rho \overline{{u}'_{i}{u}'_{j}}\right)。$ (2)

 图 8 不同航速下UUV轴向干扰力 Fig. 8 UUV axial interference force at different speeds
3.3 侧向间距和水下航行体航速影响分析

 图 9 不同航速和侧向位置下计算结果 Fig. 9 Calculation results at different speeds and side positions

4 结　语

1）本文所用的重叠网格方法可以很好地实现UUV与水下航行体模型相对运动过程的非定常数值模拟。

2）水下航行体绕流对UUV的干扰效应集中在水下航行体首部和尾部区域，在尾部区域主要表现为推力和吸力，在首部区域则主要表现为阻力和斥力，在0.3$\leqslant \overline{x}\leqslant$0.75区间内UUV若保持直航则水下航行体绕流的干扰效应基本可以忽略。

3） 水下航行体航速变化的影响主要表现在干扰力的幅值上，对UUV水动力变化的趋势基本没有影响。

4） 对于UUV轴向力系数而言，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UUV侧向力系数和偏航力矩系数而言，侧向间距的影响要远大于航速，航速的影响作用可以忽略。

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