不同种类破空气体对高真空多层绝热低温容器真空丧失后传热的影响  

Experimental investigation of influence of different leaking gases on heat transfer in a high vacuum multilayer insulation cryogenic tank after sudden loss of vacuum

作　　者：朱鸣[1] 于忠杰[1] 徐彬[1] 汪荣顺[1] 

机构地区：[1]上海交通大学制冷与低温工程研究所上海200240

出　　处：《低温工程》2012年第1期16-18,共3页Cryogenics

基　　金：中国博士后科学基金项目(20070410722)资助

摘　　要：通过实验,分别利用氮气、空气、氧气和氦气作为破空气体,对高真空多层绝热低温容器在真空完全丧失后的漏热进行了研究。结果表明,多层绝热结构对于绝热真空完全丧失后的低温容器能够起到一定的保护作用,初始和最终漏热和渗入到绝热真空夹层中气体的性质密切相关。Sudden loss of the vacuum was dangerous for cryogenic vessel. An experimental investigation of the influence of different leaking gases was presented on the heat transfer process in a cryogenic tank after loss of insulation vacuum. The experiments were conducted with the breakdown of the insulation vacuum with nitrogen, air, helium, oxygen. The experimental results showed that the venting rate and heat flux are the biggest when the leaking gas is oxygen.

关 键 词：高真空复合多层绝热 真空丧失排放率 热流密度 

分 类 号：TB657[一般工业技术—制冷工程]