高真空多层绝热低温容器真空丧失后的传热研究

摘要

The heat transfer in the insulation jacket will increase immediately after a sudden, catastrophic loss of insulating vacuum (SCLIV) is happened on a HVMLI cryogenic tank. The influence of SCLIV on storage performance in a HVMLI cryogenic tank was experimentally studied in this paper. A test rig was built up and experiments were conducted using LN2 as the test medium. The cryogenic tank was tested in the conditions of various combinations with different initial filling rate and number of insulation layers.%高真空多层绝热低温容器的绝热夹层发生完全的真空丧失事故后,由于自然对流换热的原因,其绝热夹层的漏热量会急剧增加.在搭建了高真空多层绝热低温容器完全真空丧失后的传热研究实验台的基础上,使用于燥氮气为破空介质、液氮为低温介质,进行了多次高真空多层绝热低温容器的完全真空丧失实验.重点研究了低温容器液位及绝热材料层数的变化对其绝热夹层完全真空丧失后传热的影响.