基于重叠网格的潜艇旋臂试验数值模拟

潜艇水动力系数和流场特性对其操纵性的研究具有重要意义。为研究潜艇的定常回转运动，应用重叠网格法，对全附体潜艇回转运动的流场进行了数值模拟，并结合计算结果对潜艇回转的涡结构、艇体周围压力分布、速度场等流场结构进行了水动力分析。结果表明：重叠网格法对角速度系数的预报精度基本可以满足工程需求，但远不如对速度系数的预报精度；重叠网格法可以良好地捕捉到流场的特征和细节；潜艇因回转运动产生剧烈的流动分离，左右两舷的流动不再对称。本文对应用重叠网格法模拟旋臂试验有一定的参考价值。

Rotation Simulation of Full Appended Submarine

The hydrodynamic coefficients and flow field characteristics are significant for the hydrodynamic performance of submarine. In order to study the steady slewing motion of the submarine, this paper applies the overset mesh to simulate the flow field of the slewing motion of the fully appended submarine, and combines the calculation results to analyze the vortex structure of the submarine''s slewing motion, the pressure distribution around the hull, and the velocity field. The results show that the prediction accuracy of the angular velocity coefficient of the overset mesh can basically meet the engineering requirements, but it is far inferior to the prediction accuracy of the velocity coefficient. The overset mesh can well capture the characteristics and details of the flow field. This paper has a certain reference value for the simulation of rotating arm test by overset mesh.