椭球体水动力数值计算  

Numerical Computation of Flow and Hydrodynamic Force of Prolate Ellipsoid at High Incidence

作　　者：肖昌润[1] 刘巨斌[2] 毕毅[1] 郑学龄[2] 

机构地区：[1]海军工程大学船舶与动力学院,武汉430033 [2]海军工程大学理学院,武汉430033

出　　处：《武汉理工大学学报（交通科学与工程版）》2007年第5期842-845,共4页Journal of Wuhan University of Technology（Transportation Science & Engineering）

摘　　要：自主开发了数值求解RANS方程的CFD计算软件.采用基于多块结构化同位网格的有限体积方法,各块间采用正接网格对接,并有一层网格的重叠,便于块间的信息交换.采用SIMPLE方法和动量插值法处理速度-压力耦合.对流项采用SMART格式离散,扩散项采用中心差分格式离散,采用SST湍流模式.作为算例之一,给出了6∶1椭球体在不同攻角下定常流场和水动力的数值计算结果,包括物体表面的压强系数、切应力系数的分布及物体所受升力系数、阻力系数和力矩系数随攻角的变化规律,并与国外文献的计算和实验结果进行了比较,符合程度令人满意.A RANS solver is developed which uses finite volume method to solve Reynolds Averaged Navier Stokes equations on one to one matched multi block grids. One layer of ghost ceils is used to exchange flow field information between blocks by SIMPLE method. Momentum interpolation method is employed to insure velocity pressure coupling. SMART scheme and central difference scheme are used for convective term and diffusion term respectively. SST two equation turbulence models are used for turbulence closure. As a test problem, the steady flow fields and hydrodynamic forces of a 6 ： 1 prolate ellipsoid at different incidence angle are computed. Computed results including surface pressure coefficient, surface friction coefficient, and body hydrodynamic coefficients, are compared with experimental and numerical ones of published papers, the agreement is satisfactory.

关 键 词：椭球体 流场 湍流 水动力 数值计算 

分 类 号：U674.76[交通运输工程—船舶及航道工程]