圆柱体出水运动的自由面效应及水冢现象分析

计算物理 ›› 2013, Vol. 30 ›› Issue (2): 187-193.

圆柱体出水运动的自由面效应及水冢现象分析

孙士丽¹, 孙义龙², 胡竞中³, 胡健⁴

1. 上海交通大学船舶海洋与建筑工程学院, 上海 200240;
2. 中国船舶重工集团公司第七〇-研究所上海分部, 上海 200240;
3. 上海外高桥造船有限公司, 上海 200137;
4. 哈尔滨工程大学船舶工程学院, 哈尔滨 150001

收稿日期:2012-05-29 修回日期:2012-11-01 出版日期:2013-03-25 发布日期:2013-03-25
作者简介:孙士丽(1983-),女,四川,博士,从事流体力学及流固耦合动力学研究,E-mail:sunshilil9831119@163.com
基金资助:
国家自然科学基金(11102048)资助项目

Free Surface Effect and Spike of a Cylinder Piercing Water Surface

SUN Shili¹, SUN Yilong², HU Jingzhong³, HU Jian⁴

1. College of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
2. China Ship Development and Design Center, Shanghai 200240, China;
3. Shanghai Waigaoqiao Shipbuilding Company, Shanghai 200137, China;
4. College of Ship Building, Harbin Engineering University, Harbin 150001, China

Received:2012-05-29 Revised:2012-11-01 Online:2013-03-25 Published:2013-03-25

摘要/Abstract

摘要： 以圆柱体为例,研究自由面附近刚性物体的受力状态,分析垂直运动圆柱体出水时的自由面效应以及水冢现象.建立基于势流理论考虑自由面效应的数学模型,并用边界元方法求解该模型.求解过程中考虑非线性自由面运动学以及动力学边界条件.通过求解控制方程以及边界条件,模拟恒速刚性圆柱体出水时的水冢现象及其穿越水冢过程.通过数值解和实验值的比较验证方法的可靠性.分析结构出水时的压力变化、自由液面变形、圆柱体所受的垂向合外力以及流场速度矢量的变化,并展开讨论.结果表明:考虑自由面效应的非线性方法能够更准确地预报自由面附近刚性运动物体的受力特性.

关键词: 圆柱体, 自由面效应, 水冢, 边界元方法

Abstract: To analyze force of fluid on a rigid object near free surface,a mathematical model with free surface effect is developed based on potential flow theory.It is calculated with boundary element method.Nonlinear kinematic and dynamic boundary conditions are taken into consideration.With control equation and boundary conditions,piercing cylinder through free surface and phenomena of spike are simulated.A comparison between numerical and experimental results shows that the method is appropriate.Pressure on moving objects,transform of free surface,resultant hydrodynamic force and velocity of flow field are analyzed in detail.It shows that the nonlinear method with free surface effect predicts precisely force on moving objects in vicinity of free surface.

Key words: cylinder, free surface effect, spike, boundary element method

中图分类号:

U661.1

孙士丽, 孙义龙, 胡竞中, 胡健. 圆柱体出水运动的自由面效应及水冢现象分析[J]. 计算物理, 2013, 30(2): 187-193.

SUN Shili, SUN Yilong, HU Jingzhong, HU Jian. Free Surface Effect and Spike of a Cylinder Piercing Water Surface[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2013, 30(2): 187-193.

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