基于k-ε湍流模型的结构物水流中跌落过程数值分析  

Numerical Analysis on the Structure Falling in Water Flow Based on k-ε Viscous Model

作　　者：王永虎 林天龙[2] WANG Yonghu;LIN Tianlong(School of Aeronautics,Chongqing Jiaotong University,Chongqing 400074,P.R.China;Civil Aviation Flight University of China,Guanghan 618307,Sichuan,P.R.China)

机构地区：[1]重庆交通大学航空学院,重庆400074 [2]中国民航飞行学院飞行技术学院,四川广汉618307

出　　处：《重庆交通大学学报（自然科学版）》2019年第2期144-150,共7页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：国家自然科学基金民航联合基金项目(U1333133);国家自然科学基金民航联合基金重点资助项目(U173320010);中国民航飞行学院科研基金面上项目(J2014-04);中国民用航空飞行学院研究生创新项目(X2016-27)

摘　　要：为了深入研究结构物水流跌落轨迹以及水底散布问题,针对结构物水流跌落现象,建立了三维圆柱体水流中跌落模型,采用了可实现的k-ε湍流模型,运用VOF法、明渠模型、动网格与六自由度模型对圆柱体在水流中跌落进行模拟仿真。对结构物跌落过程的竖直和水平方向速度进行了定量分析,分析结果表明:在脱离空穴时圆柱体受水流的作用力最大。分别将结构物跌落现象和轨迹与跌落实验进行对比,通过误差分析进一步确认仿真数据与实验结果基本吻合,给出圆柱体水中跌落轨迹拟合方程,为结构物跌落运动学分析和水底散布打捞等提供一定的参考依据。To research the trajectory and underwater dispersion of the structure falling in water flow,the 3D cylinder falling model was established for the phenomenon of the structure falling in water flow.The realizable k-ε viscous model,the volume of fluid(VOF)method,open channel model,dynamic mesh and 6 degrees of freedom(6DOF)model were used to simulate the cylinder falling in water flow.Then vertical and horizontal velocity of the structure falling was analyzed quantitatively in all the process.The analysis results indicate that when the cylinder is separated from the cavity,the force of water flow is the greatest.The dropping phenomena and trajectories of structures were compared with the dropping experiments,and the error analysis further confirmed that the simulation data were basically consistent with the experimental results.The fitting equation of the trajectory of a cylinder falling in water was given.The numerical analysis provides a certain reference for the analysis of structure falling kinematics and underwater dispersal salvage.

关 键 词：载运工具工程 可实现的k-ε模型 有限体积法 VOF方法 明渠模型 误差分析 

分 类 号：V219[航空宇航科学与技术—航空宇航推进理论与工程]