舰船气泡尾流数值模拟

摘要：
以韩国船舶与海洋工程研究所(KRISO)的集装箱船KCS（KRISO Container Ship）模型为研究对象，以通用
计算流体力学(CFD)软件FLUENT为平台，进行了基于流体体积（VOF）两相流模型的KCS带自由面黏性流场数值模拟；将自由面固化，对自由面以下水体进行了基于混合物多相流（Mixture）模型的KCS气泡尾流场数值模拟，探讨了Realizable k ε（R k ε）两方程模型和雷诺应力模型对气泡尾流计算的影响.计算所得结果定性正确，验证了与自由面法向速度梯度相关的气泡卷吸模型及相应求解方法的适用性. 关键词：
多相流； 舰船； 气泡尾流； 数值模拟 中图分类号： O 359.1
文献标志码： A

A Numerical Method to Simulate Ship Bubbly Wake

A numerical method was put up forward to simulate ship bubbly wake. The free surface around a model-scaled KRISO(Korean research institute of ship and ocean engineering) container ship (KCS) was first numerically simulated through the volume of fluid two-phase model imbedded in general computational fluid dynamics(CFD) code FLUENT. Then in order to simulate the bubbly wake around KCS hull, the under-water flow field was computed based on the mixture multiphase model with a rigid-lid-free-surface method. The Realizable k-ε two-equation turbulence model and Reynolds stress model were used to analyze the effects of turbulence model on the bubbly ship wake. The air entrainment model that is relative to the normal velocity gradient of the free surface, and the solving method are justified by the qualitatively reasonable computed results.