ステップ状ふく射加熱による円筒状試料の熱拡散率測定法

概要

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A measuring method of the thermal diffusivity of cylindrical samples such as boiler tubes by stepwise radiative heating is described. Heat transfer tubes sometimes are coated by extracted materials as scale on the inside surfaces and make two layered-composites. The inside surface of this cylindrical sample is subjected to a stepwise radiative energy from a stick type lamp and resulting temperature history of the outside surface is recorded. From this temperature rise, the thermal diffusivity value of the inner layered-material is determined by comparison with one dimensional theoretical temperature variation. The degree of errors due to heatloss from the surfaces are theoretically analyzed. Experimental results for an aluminum tube and a tool steel tube agree well with the reference data. Thermal diffusivity of the steel tube coated with gypsum is measured.
一般社団法人日本機械学会の論文
1984-03-28