文档介绍：低温与超导制冷技术 Cryo. & Supercond.
第 37卷
第 8期 R efrigeration V o .l 37
N o. 8
航天器多层绝热材料的非稳态传热分析
杨明, 吴晓迪, 吕相银, 李颖杰
(电子工程学院安徽省红外与低温等离子体重点实验室, 合肥 230037)

摘要: 根据反射屏能量平衡建立了多层绝热材料的非稳态传热方程。以双面镀铝涤纶薄膜为研究对象, 在不
进行预处理、表面印花处理两种实验条件下, 得到了绝热材料中各反射屏温度随航天器飞行过程中的具体数值变
化规律。最后, 在特定的两个时刻分析了绝热材料的当量热导率及其分量, 发现残留气体导热约占 70% 。
关键词: 多层绝热材料; 航天器; 非稳态传热; 温度; 当量热导率
Analysis of unsteady heat transfer of spacecraft multilayer insulation
Y ang M ing, W u X iaod,i L v X iangy in, L i Y ing jie
( K ey Lab of Infrared and L ow T em perature P lasm a of A nhui P rov ince, E lectron ic Eng ineering Institute,
H efe i 230037, Ch ina)
Abstrac t: Base on energy balance of the re flectiv e screens, the unsteady heat transfer equa tion of mu ltilaye r insu la tion
( M L I) was estab lished. D oub le alum inized my larM L Iw as taken as an ob jec t o f the study, unde r the unpre trea tm ent and patterns
printed conditions, the tem pera ture change of the each reflective screen in the M L I in o rbit w as obtained. A t last, the variationa l
law s o f therm a l conductiv ity and ponen tw ere ana ly zed unde r the tw o spec ia l tim es, the percentage o f heat transfer by re-
sidua l gas was abou t 70% .
K eyword s: M ultilayer insulation, Spacecraft, U nsteady heat transfe r, T em pe rature, T he rm al conductivity
1
引言化将影响传热量及其分量(辐射传热、固体导热、
残留气体导热)。在空间飞行的航天器外热流变
由于在真空环境下突出的隔热性能, 多层绝化非