三维船体自由面贴体网格的数值生成

本文开发了一种用于任意船型的可讨论自由面对船体粘性流场影响的三维船体贴体网格的自动生成程序。文中所采用的三维船体贴体坐标系将不固定在随时间运动的自由表面上，以预估的最大波高来限制自由面网格的区域，通过内插或外插来满足自由面上的边界条件。该模块的特点是网格生成的计算量相当小，尤其能极方便地控制自由面在船面附近的网格密度以及船面附近的网格间距，以Ｓｅｒｉｅｓ６０船模作为计算算例，其网格生成的质量是相当

A Numerical Generation of Three-Dimensional Body-Fitted Grid with Free-Surface for Ship Hull

An auto generation code of three-dimensional body-fitted grid for arbitary ship forms,which are used to disscuss the influence of a free surface on ship hull viscous flow fields,is developed in this paper.Three-dimensional body-fitted systems used will not be fitted on a free surface changing with time,and the range of a free-surface grid is limited under the predicting maximum wave height,and then the boundary conditions about a free surface will be satisfied through interpolation or extropolation.The main features of the code are that the amount of the work is rather small in grid generation, especially this can easily control the grid density of a free surface near the ship surface.Series-60 ship model is used as an example for calculation and the quality of grid generation is rather satisfactory.