LNG双液滴蒸发模型及应用  

LNG Double Droplets Evaporation Model and Its Application

作　　者：束露露 费正阳 邓佳佳 SHU Lulu;FEI Zhengyang;DENG Jiajia(School of Naval Architecture and Maritime,Zhejiang Ocean University,Zhoushan 316022,Zhejiang,China;Guangxi Electrical Polytechnic Institute,Nanning 530007,Guangxi,China)

机构地区：[1]浙江海洋大学船舶与海运学院,浙江舟山316022 [2]广西电力职业技术学院,广西南宁530007

出　　处：《造船技术》2023年第6期25-29,共5页

基　　金：浙江省基础公益研究计划项目(编号:LY18E090009);浙江省舟山市科技局项目(编号:2016C12010,2018C12044)。

摘　　要：液化天然气(Liquefied Natural Gas,LNG)在液舱预冷过程中以多液滴的形式存在,现阶段缺少LNG多液滴在同种蒸汽中的蒸发模型。以双液滴为基础,采用计算流体动力学(Computational Fluid Dynamics,CFD)方法,建立适用于LNG双液滴在其蒸汽中的蒸发模型。利用该新模型对温差为190 K、相对距离为10~70,粒径为0.1~2.5 mm的液舱预冷过程进行模拟分析,得出具有实际应用价值的结果:在液舱预冷起始阶段温度下降的速度较快,且随着时间的增加,双液滴相对距离越大,液舱预冷结束时间越小;双液滴液舱预冷结束时间与粒径呈反比关系,与起始温度呈正比关系。该新模型可适应于实际工程应用。Liquefied Natural Gas(LNG)exists in the form of multiple droplets during the tank precooling,and the evaporation model of LNG multiple droplets in the same steam lacks at this stage.Based on the double droplets,an evaporation model that is applicable to LNG double droplets in its steam is established with Computational Fluid Dynamics(CFD)method.The new model is used to simulate the tank precooling process with temperature difference of 190 K,relative distance of 10~70,and particle size of 0.1~2.5 mm.The results that are of the practical application value are obtained:the temperature decreases faster in the initial stage of tank precooling,and with the increase of time,the greater the relative distance between double droplets,the smaller the end time of tank precooling;the end time of tank precooling of double droplets is inversely proportional to the particle size,and positively proportional to the initial temperature.The new model can be adapted to the practical engineering applications.

关 键 词：液化天然气 双液滴 蒸发模型 液舱预冷 

分 类 号：U674.133.3[交通运输工程—船舶及航道工程]