舱内双层液体晃荡特性分析  

Analysis of Sloshing Characteristics of Two-Layered Liquid in Tanks

作　　者：方译彩 朱仁庆 卢莉莉 FANGYicai;ZHU Renqing;LU Lili(School of Naval Architecture and Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang 212100,Jiangsu,China)

机构地区：[1]江苏科技大学船舶与海洋工程学院,江苏镇江212003

出　　处：《船舶工程》2024年第2期56-63,共8页Ship Engineering

基　　金：国家自然科学基金资助项目(52271318,50879030)。

摘　　要：基于计算机流体力学(CFD)技术,借助流体计算软件STAR-CCM+对舱内双层液体的晃荡特性进行了研究。对双层液体微幅自由晃荡开展数值模拟,计算了自由液面和油水交界面运动固有频率,并与线性势流理论计算结果进行了对比。将数值模拟结果与试验结果进行对比,分析了单、双层液体在不同激励条件下的晃荡特性。结果表明:分层液体每个晃荡模态都存在两个固有频率,且上层液体的固有频率更高,而单层液体仅有一个固有频率且随着黏度增大而降低;相较于单层液体,双层液体的自由表面晃荡更小,且存在一定的相位滞后,从而降低了压力冲击幅值;双层液体油水交界面相对自由表面运动更缓慢,上层液体对下层液体的运动有抑制作用。Based on computational fluid dynamics(CFD)technology,STAR-CCM+,a fluid computing software,is used to study the sloshing characteristics of the double-layer liquid in the cabin.The numerical simulation of the small amplitude wave free sloshing of two-layered liquid is carried out,and the natural frequencies of the free surface and oil-water interface are calculated,and the results are compared with those of the linear potential flow theory.The numerical simulation results are compared with the experimental results,and the sloshing characteristics of single and two-layered liquids under different excitation conditions were compared and analyzed.The results show that each sloshing mode of layered liquid has two natural frequencies,and the natural frequencies of the upper liquid are higher,and the natural frequencies of the single liquid only have one natural frequency,which decreases with the increase of viscosity.Compared with single-layer liquid,the free surface sloshing of layered liquid is smaller,and there is a certain phase lag,which reduces the pressure impact amplitude.The oil-water interface of the layered liquid move more slowly than the free surface,and the upper liquid has a restraining effect on the lower liquid.

关 键 词：分层液体晃荡 数值模拟 流体体积法 自由衰减 

分 类 号：U661.1[交通运输工程—船舶及航道工程]