低温容器绝热真空丧失后的绝热夹层漏热量计算分析  

The calculation analysis of heat flux into high vacuum multi-layers insulating vessel after loss of vacuum

作　　者：徐学刚 程欣[2] 朱鸣[3] 

机构地区：[1]常州蓝翼飞机装备制造有限公司,常州213016 [2]四川石油天然气建设工程有限责任公司,成都610213 [3]上海交通大学制冷与低温工程研究所,上海200240

出　　处：《低温与超导》2012年第8期16-22,共7页Cryogenics and Superconductivity

摘　　要：真空丧失对低温容器的安全性是一大威胁,可能会造成严重后果。文中通过实验,利用氮气为破空介质,测得了高真空多层绝热低温容器在真空丧失情况下的排放率,根据测得的排放率计算了热流密度。结果表明,根据测得的排放率,不考虑液体温度变化计算得到的热流密度与考虑液体温度变化计算得到的热流密度之间存在差异。Sudden loss of the vacuum of a cryogenic vessel could bring about serious consequences. This paper presented an investigation on the calculation of heat flux into the cryogenic tank after nitrogen was introduced into the insulation jacket. The re- suits showed that the difference appeared between the heat flux calculations with taking the change of liquid nitrogen temperature into account and without taking this into account.

关 键 词：低温容器 高真空多层绝热 真空丧失 排放率 热流密度 

分 类 号：U469.6[机械工程—车辆工程]