基于重叠网格的重水潜器粘流数值模拟

Numerical simulation of the Heavier-than-water AUV with overset grid method

文章结合一种密度大于水的新型潜器—重水潜器(Heavier-than-water AUV,简称HTW),采用RANS方法和重叠网格计算了该潜器的水动力性能和绕流流场。文中计算了不同攻角和漂角情况下重水潜器的阻力、升力及俯仰力矩,对其周围流场水动力学性能进行了分析,并通过流场的流动结构研究了受力随姿态变化的规律。文中将采用重叠网格方法的计算结果与FLUENT计算值以及风洞试验结果进行了比较,表明重叠网格方法可较好地模拟重水潜器的自由态绕流问题。该研究为该潜器的总体设计与运动控制提供了有价值的参考。

This paper is based on a new kind of underwater vehicle （Heavier-than-water AUV）, whose den-sity is higher than water. RANS method and overset grids are used to calculate the flow around the under-water vehicle. In this paper, the lifts, drags and moments of different attack and drift angles are calculated using a numerical method. The hydrodynamic performances are analyzed and how the forces change with the attitude is studied according to the flow structure. Through the numerical solution with overset grids, the nu-merical results are compared with those of software FLUENT and wind tunnel tests. The calculation re-sults show that the overset grid method can well simulate the viscous flow around the underwater vehicle, which would be helpful for design and control of the underwater vehicle.