深冷容器内部液氮蒸发的分析  

The research on thermal insulation performance evaluation of cryogenic equipment

作　　者：肖学文 刘康林[2] 李民 Xiao Xue-wen;Liu Kang-lin;Li Min(Jingmen Hongtu Special Aircraft Manufacturing CO.,LTD.,Jingmen 448000,China;School of Chemistry and Chemical Engineering,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]荆门宏图特种飞行器制造有限公司,湖北荆门448000 [2]福州大学,福建福州350108

出　　处：《化学工程与装备》2020年第10期194-197,共4页Chemical Engineering & Equipment

摘　　要：深冷容器是用来贮存液氧、液氮和液化天然气等深冷介质的真空夹套式容器,其安全可靠性很大程度上取决于容器是否具有良好的绝热性能,而现有绝热性能评价指标存在经济性和可检测性差等问题。为此,本文应用CFD方法,分析了深冷容器的漏热与内部液氮的蒸发过程,得到了深冷容器内液氮在不同充装率下的压力场、温度场和蒸发率随时间的变化规律,通过试验和FLUENT后处理,建立了压升与蒸发率之间的关系,通过微粒子群优化方法得到了液氮容器初始充装率对容器内部液氮蒸发率的影响。研究结果对深冷容器绝热性能的评价有借鉴意义。The pressure field and evaporation rate of the cryogenic liquid nitrogen cylinder have been obtained,by using FLUENT fluid analysis software.This paper establishs a corresponding relation between the rate of pressure rise and evaporation rates through the post processing of the result.It is proved the feasibility of the using the rate of pressure rise as the evaluation index and validity of the FLUENT model.

关 键 词：深冷容器 液化气体 蒸发 压升速率 

分 类 号：TQ05[化学工程]