基于CLSVOF方法的两层液体晃荡数值模拟  

Numerical simulation of two-layer liquid sloshing using CLSVOF method

作　　者：刘东喜 庄宿国[2] 王晋[3] 尤云祥[3] Liu Dongxi;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,陕西西安710100 [3]上海交通大学海洋工程国家重点实验室,上海200240

出　　处：《华中科技大学学报（自然科学版）》2018年第8期116-121,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：航天先进制造技术研究联合基金资助项目(U1737112)

摘　　要：采用CLSVOF界面捕获方法对矩形舱两层液体晃荡问题进行了数值研究.首先,开展了数值自由衰减测试,验证线性势流理论得到的系统固有频率的准确性,并根据固有频率的计算值确定了模拟工况.然后,探讨了外部激励频率稍微偏离系统固有频率时,液液界面出现的拍频现象.最后,对比了计算和试验得到的液液界面形状以及高度时间历程,验证CLSVOF方法在模拟两层液体晃荡时的准确性.研究结果表明：数值方法可用于计算两层液体系统的固有频率并研究两层液体的晃荡特性;当液舱外部激励频率稍微偏离系统的固有频率时,液液界面也会像自由表面一样出现拍频现象,拍频波的频率取决于系统的固有频率以及液舱激励频率,频率值为二者差的绝对值.The CLSVOF interface capturing method was employed to investigate the two-layer liquid sloshing in a rectangular tank.First,in order to obtain the natural frequencies of interfaces numerically,the free decay test was performed and obtained frequencies were compared with the theoretical resonant frequencies.Then,the beating phenomenon,which appear at the liquid-liquid interface when the external frequency is slightly away from the resonant frequency,was studied.Finally,the numerical liquid-liquid interface profiles and elevations were compared to corresponding experimental results,which further confirm the capability of the CLSVOF method for two-layer liquid sloshing simulation.The results show that the numerical method can be used to calculate the natural frequency of the two-layer liquid system and study the sloshing characteristics of the two liquids.When the external excitation frequency of the tank slightly deviates from the natural frequency of the system,the beating phenomenon will occur at the liquid-liquid interface.The frequency of the beat wave depends on the natural frequency of the system and the excitation frequency of the tank,and the value of the frequency is equal to the absolute value of the difference between the two frequencies.

关 键 词：矩形舱 两层液体晃荡 CLSVOF方法 自由衰减测试 拍频现象 

分 类 号：O35[理学—流体力学]