矩形舱内三层液体晃荡特性的数值分析  

Numerical Investigation of Three-Layer Liquid Sloshing in a Rectangular Tank

作　　者：刘东喜 庄宿国[2] 王晋[3] 尤云祥[3] LIU Dongzi;ZHUANG Suguo;WANG Jin;YOU Yunxiang(College of Ocean Science and Engineering,Shanghai Maritime University,Shanghai 201306,China;Xi' an Aerospace Propulsion Institute,Xi' an 710100,China;State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海海事大学海洋科学与工程学院,上海201306 [2]西安航天动力研究所,西安710100 [3]上海交通大学海洋工程国家重点实验室,上海200240

出　　处：《上海交通大学学报》2019年第8期952-956,共5页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(51809163)

摘　　要：采用耦合水平集和流体体积(CLSVOF)界面捕获方法对浮式生产储卸油(FPSO)装置矩形清洗舱内三层液体的晃荡特性进行数值分析;通过对比数值模拟与试验所得矩形舱内三层液体的液-液界面形状和高度的变化情况,验证了CLSVOF方法模拟多层液体晃荡特性的准确性.结果表明,多层液体晃荡过程中出现的物理现象远比传统单层液体晃荡中的复杂.当矩形舱外部激励频率等于液-液界面的最低阶固有频率时,所产生的共振效应不仅会导致液-液界面的晃荡幅度远大于自由表面的晃荡幅度,而且会导致液-液界面产生Kelvin-Helmholtz不稳定性.In the present study,the coupled level set and volume of fluid(CLSVOF)interface capturing method is employed to investigate the three-layer liquid sloshing in a rectangular wash tank installed aboard floating production storage and offloading(FPSO).The study shows that in the case of multi-layer liquid sloshing,the relevant physics can be much more complicated compared with the single liquid sloshing case.When the forced oscillation frequency is slightly away from the resonant frequency,there is an interesting phenomenon that the internal sloshing between liquid-liquid interfaces is significantly more pronounced than the actual oscillation of the top free surface.Another important issue for multi-interface problems is Kelvin-Helmholtz instability along the interface.Finally,the excellent capability of the CLSVOF method for multi-layer liquid sloshing simulation is validated by the qualitative comparisons of numerical and test results.

关 键 词：矩形舱 三层液体 晃荡 耦合水平集和流体体积方法 KELVIN-HELMHOLTZ不稳定性 

分 类 号：U661.73[交通运输工程—船舶及航道工程]