东南大学学报（英文版）2020，Vol.36Issue(3)：292-300,9.DOI:10.3969/j.issn.1003-7985.2020.03.007
液化天然气船用储罐形貌对流体晃动特性影响的数值分析
Numerical investigation of liquid sloshing in FLNG membrane tanks with various bottom slopes
摘要
Abstract
To analyze the bottom slope's effect on the sloshing liquid in floating liquefied natural gas (FLNG) membrane tanks,a simulation model is built and applied to describe the liquid behavior in a sloshing container.The free surface motion is simulated by the volume-of-fluid method and the standard k-ε turbulence model.Experimental data and numerical results from references are used to validate the accuracy of the proposed simulation model.To study the influence of the sloped bottom on the liquid sloshing,different slope sizes and filling ratios are numerically simulated at the lowest natural frequency.The results reveal that the natural frequency can be determined by the average peak values of hydrodynamic parameters.The natural frequency and pressure loading on the tank walls decrease with the increase in the slope size.The peak pressure on the wall decreases by 5.45 kPa with the increase in the slope ratio from 5％ to 20％.However,the relationship between the peak pressure and slope ratio is more significant with lower filling rates.Liquid behavior is more stable and independent with the change of the slope structure at a high filling rate (60％).The results of numerical simulation and modeling are expected to provide reference data for the design and operation of the FLNG system.关键词
液体晃动/固有频率/储罐底板斜度/流体体积法Key words
liquid sloshing/natural frequency/sloped tank bottom/volume-of-fluid method分类
能源科技引用本文复制引用
严岩,徐展,魏蔚,倪中华,孙东科..液化天然气船用储罐形貌对流体晃动特性影响的数值分析[J].东南大学学报（英文版）,2020,36(3):292-300,9.基金项目
The National Natural Science Foundation of China(No.51905093),the Natural Science Foundation of Jiangsu Province for Young Scholars (No.BK20180392). （No.51905093）
