加四方镀铝箔片的真空粉末绝热传热过程的研究

RESEARCHES ON HEAT TRANSFER PROCESS IN EVACUATED POWDER INSULATION WITH SQUAR ALUMINIUM-COATED FLAKES

本文对加有四方镀铝箔片的真空粉末绝热结构中的传热过程进行了理讨分析和实验研究。在真空粉末绝热结构传热计算式的基础上,对加四方镀铝箔片的真空粉末绝热的导热系数和辐射衰减系数进行了推导和修正。结果表明,有效导热系数的计算值同试验值相一致。

In the paper, the theoretical analyses and experimental researches on heat transfer process in the evacuated powder insulation with squat aluminium-coated flakes additive are carried out. With the fundament of heat transfer formulae of evacuated powder insulation, the formulae for the thermal conductivity and radiation extinction coefficient of evacuated powder insulation with squat aluminium-coated flakes additive are deduced. It is proven that, by use of the deduced formulae, the calculated results of the effective thermal conductivity coincide with experiments.