破损船舶进水模拟(英文)

CFD Simulation of Water Ingress into Damaged Ships

本文应用RANS方程进行了破损船舶的进水模拟。使用了流体体积法、两方程湍流模型及壁函数处理自由面附近湍流流动 ,给出了后台阶流动、系列60以及破损Burgundy船的CFD模拟计算结果 ,捕捉了船舶破损相关的基本流动特征。

The numerical simulation of water ingress into damaged ship was carried out by using Reynolds Averaged Navier-Stokes(RANS) method and computational results were presented in this paper.Standard K-ε two-equation turbulence model together with wall function was adopted to describe the behavior of near-wall and near free surface turbulent flow.Volume of Fluid (VOF) algorithm was applied to deal with water-air free surface.Closing differential equation system was discretized by finite volume (FV) approach.Resulting difference equations were solved by SIMPLEC.The test cases were composed of BFS (Backward Facing Step),Series 60 free surface flow,damaged Burgundy case.The prediction shows that the flow phenomenon could be captured qualitatively by CFD. Further detailed quantitative data including pressure distribution,velocity distribution,free surface profile,resultant force and moment acting on patches such as ship hull could be also obtained to assist in the understanding of the problem and optimizing design.