两层流体中多个振荡水平圆柱潜体水动力特性  

Hydrodynamic characteristics of multihorizontal pulsating circular cylinders in a two-layers fluid of infinite depth

作　　者：吝红军[1,2] 郑永红[1,3] 游亚戈[1,2] 盛松伟[1,2] 张韵秋[1,2] 

机构地区：[1]中国科学院广州能源研究所,广东广州510640 [2]中国科学院广州能源研究所中国科学院可再生能源与天然气水合物重点实验室,广东广州510640 [3]中国科学院青岛生物能源与过程研究所,山东青岛266071

出　　处：《海洋学报》2009年第3期149-157,共9页

基　　金：国家自然科学基金资助项目(50679078);广东省自然科学基金资助项目(06020452)

摘　　要：采用解析方法研究了无限水深两层流体中多个振荡水平圆柱潜体的水动力特性。在线性势流理论框架内,基于多极子方法建立了辐射势的解析表达式,在此基础上导出了附加质量和阻尼系数的计算公式,采用边界元方法对这种解析方法进行验证,同时研究了两种不同工况下多个振荡水平圆柱潜体水动力的特性,结果表明,两层流体的密度比、圆柱的淹没深度以及圆柱的排列方式和间距等参数的变化对水平圆柱群附加质量和阻尼系数有很大的影响。An analytical method is used to analyze the hydrodynamic characteristics of an array of horizontal pulsating circular cylinders in a two-layers fluid of infinite depth. Under the linear potential theory, ana- lytic expressions for the radiation potential functions are obtained by using the multipole expansion meth- od, and expressions for an added mass and a damping coefficient are defined. After the correctness of this method was verified by the boundary element method, the hydrodynamic characteristics of the array of horizontal circular cylinders are analyzed on two different conditions. It is concluded that the fluid density ratio, the submergence depth, the arrangement and the spacing of cylinders have great impact on the results of the added mass and the damping coefficient.

关 键 词：两层流体 辐射势 附加质量 阻尼系数 

分 类 号：O353.2[理学—流体力学]