潜艇应急上浮六自由度运动及黏性流场数值模拟

Numerical simulation of six degree of freedom motion and viscous flow for submarine's emergency ascent

为揭示潜艇应急上浮过程中的强非线性运动及水动力作用规律,基于RANS方程及流体体积模型,针对Suboff标模建立了潜艇应急上浮数值预报方法。通过开展不同纵倾攻角及斜航漂角下全附体模型的水动力计算,验证了该计算方法的有效性,确定了其适用范围,进而结合整体动网格技术模拟了潜艇的应急上浮过程,获得了艇体六自由度运动的时历参数及流场细节信息。数值模拟结果表明该方法能够较合理地描述潜艇上浮的运动规律,也证明了该方法在潜艇上浮多自由度运动及水动力性能研究中的潜力和适用性。

A method to estimate submarined strongly nonlinear motion and hydrodynamic performance during emergency ascent was presented. RANS equations and VOF （volume of fluid） model were applied for simulation cases. The oblique towing experiments with different pitch and yaw angles were calculated numerically to verify the effectiveness of the method and obtain the proper application range for a fully appended Suboff model. Therefore, the emergency ascent process of submarine was simulated with integral dynamic mesh strategy, and the time parameters and the detail flow information of submarine under 6DOF （six degree of freedom） motion were obtained. Numerical simulation results show that the method can reasonably describe the motion law for submarined emergency ascent and is feasible and powerful in the research about the multi degree of freedom motions and hydrodynamic characteristics of the submarine＇s ascent.