数字海洋与水下攻防2025，Vol.8Issue(3)：291-300,10.DOI:10.19838/j.issn.2096-5753.2025.03.006
航行体出水仿真的自适应网格技术研究
Research on Adaptive Grid Technology for Simulation of Vehicle Water Exit
摘要
Abstract
The investigation into the evolution law of the surrounding flow field and the response mechanisms of the hydrodynamic characteristics of the vehicle during cross-medium navigation is of significant importance for optimizing vehicle design,enhancing navigational efficiency,and extending service life.Utilizing a quadtree data structure in conjunction with adaptive mesh refinement and coarsening based on hole boundaries and volume of fluid(VOF)gradient,the adaptive Cartesian grid employed in this study addresses the issue of excessive mesh count in overlapping grid methods.The verification results show that,under equivalent mesh scale and computational configuration,the adaptive mesh technology achieves a reduction of 64.59%in computational time.As for the numerical simulation of vehicle water exit at different initial velocities,the overlapping grid method is used to discretize the computing domain with moving parts,and the VOF multiphase flow model is adopted to solve the fluid volume fraction equation.The finite volume method(FVM)is utilized for spatial and temporal discretization of the governing equations.The turbulence model,Realizable k-ε,is employed for solving the turbulence equations.The numerical results indicate that the free-surface effect and wake entrainment/shedding significantly influence vehicle water exit.As the initial navigational velocity increases,the hydrodynamic forces acting on the vehicle intensify,resulting in a nonlinear decrease in vehicle velocity.关键词
流体动力/自适应网格/重叠网格/不可压缩流/航行出水Key words
hydrodynamics/adaptive grid/overlapping grids/incompressible flow/vehicle water exit分类
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张军,王春杰,李华伟,焦艳梅..航行体出水仿真的自适应网格技术研究[J].数字海洋与水下攻防,2025,8(3):291-300,10.基金项目
国家自然科学基金青年科学基金项目"多因素耦合作用下基于纳米通道的直接盐差能能量转化机理研究"(52106246). （52106246）
