基于重叠网格方法的楔形体入水抨击数值模拟  

Numerical simulation of wedge water entry slamming based on overset grid method

作　　者：蔡威 张金凤[1] CAI Wei;ZHANG Jin-feng(State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学水利工程仿真与安全国家重点实验室

出　　处：《水道港口》2019年第6期656-662,共7页Journal of Waterway and Harbor

基　　金：国家自然基金面上项目(51979190);国家自然科学联合基金项目(U1906231);天津市自然科学基金(18JCZDJC40200)

摘　　要：流体和浮体相互作用是海岸及海洋工程急需研究的热点问题之一。文章基于OpenFOAM建立二维数值水槽,利用VOF(Volume of Fluid)方法来捕捉自由表面,通过使用重叠网格方法来描述流固耦合作用。利用建立的数值模型模拟了楔形物块的垂向和斜向入水抨击过程,对比了不同状况下的抨击压强分布,分析了水平速度对抨击压强分布的影响。模拟结果与理论解吻合较好,表明了该模型能够合理地模拟物块与水的相互作用问题。The study of the interaction between fluid and floating body is one of important topics in coastal and ocean engineering.In this paper,a two-dimensional numerical flume was established based on OpenFOAM.In the numerical model,VOF(Volume of Fluid)method was used to capture the free surface,and overset grid method was used to describe the fluid-structure interaction.The vertical and oblique water entry slamming processes of wedge were investigated.The slamming pressure under different conditions was compared,and the influence of horizontal velocity on the slamming pressure distribution was analyzed.The simulation results are in good agreement with the theoretical solutions,which shows that the model can reasonably simulate the interaction between the block and water.

关 键 词：OPENFOAM 流固耦合 重叠网格方法 楔形物块 入水抨击 

分 类 号：U65[交通运输工程—港口、海岸及近海工程] O242.1[交通运输工程—船舶与海洋工程]