潜艇上浮出水运动及粘性流场直接数值模拟方法

摘要

为得到潜艇上浮出水运动及流场特性,以带流水孔柱形潜体为研究对象,基于RANS方程及SST k-ω湍流模型,并应用重叠网格技术实现了不同工况下潜体上浮的直接数值模拟,获取了模型上浮过程中横倾、纵倾及上浮速度等参数的时历曲线及流场细节信息.研究结果表明:该方法较合理地反映了潜体的上浮运动规律,能够直观展现潜体出水及倾覆过程,可为潜艇上浮出水稳性的预报及分析提供可行途径.%To get nonlinear motion and viscous flow field for surfacing submarine,simulations of surfacing maneuvers of a cylindrical submerged body with flood holes are carried out based on RANS equations coupled with SST turbulence model.Overset grids are applied to perform the maneuvers under different conditions.Time series of heel,trim and surfacing velocity as well as local flow characteristics are obtained.The results show that the proposed method is suitable for surfacing problems of submerged bodies and it provides a practical approach to study submarine's stability during surfacing.