低温断熱を対象とした粉体の伝熱特性 : 第1報、大気圧および減圧下の有効熱伝導率

概要

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As thermal insulation powders usually contain much viods in each particle of the powders, the former theoretical equations on its effective thermal conductivity do not agree with experiments if the equations are employed without modification. In this study, the thermal conductivity of a particle is firstly estimated by a simple cell model, then the effective thermal conductivity of the powders is calculated on the assumption that the powder consists of the particles of the above estimated thermal conductivity. While the effective thermal conductivities of the powder of perlite and hollow micro glass sphere are measured in low temperature range, and are compared with calculated values. As a result, at a given temperature and gas pressure the experimental values agreed well with the calculated values.
一般社団法人日本機械学会の論文
1984-03-28