静止液态甲烷饱和单液滴蒸发量与蒸发时间

Evaporation Amount and Time of Saturated Single Droplet of Stationary Liquid Methane

为研究LNG液舱预冷的过程和特性,利用计算机编程技术,建立静止饱和单液滴在同种蒸气中蒸发模型,并对液态甲烷液滴在不同温差下蒸发数据进行研究,得出结论如下:液滴表面蒸气速度随液滴半径的减小而增大,随环境与液滴中心的温差的增大而增大,液滴蒸发速率随液滴半径和温差增大而增大。初始半径越大,温差对完全蒸发时间影响越大,当温差超过100 K时,温差的影响减弱。初始半径对相对蒸发率和绝对蒸发量的影响不同,初始半径越小,绝对蒸发量越小,相对蒸发率越大。

In order to study the process and characteristics of pre-cooling LNG tank,a model of evaporation of stationary saturated single droplet in the same kind of vapor was built by computer programming technology,and the evaporation data of liquid methane droplets under different temperature differences were studied.The conclusions are as follows:The vapor velocity of the droplet surface increases with the decrease of the droplet radius,and increases with the increase of the temperature difference between the environment and the droplet center.The droplet evaporation rate increases with the increase of the droplet radius and the temperature difference.The larger the initial radius,the more greater the influence of temperature difference on the complete evaporation time.When the temperature difference exceeds 100 K,the influence of the temperature difference is weakened.The initial radius has different effects on the relative evaporation rate and the absolute evaporation amount.The smaller the initial radius,the smaller the absolute evaporation amount and the larger the relative evaporation rate.