Thermal diffusivity measurements by using "logarithmic method" on samples having anomalous shape.

概要

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Measurements of thermophysical properties are sometimes required on samples having anomalous shape. For example, values of thermal conductivity of the cladding material for nuclear fuel of water-cooled reactor, in a form of tubing -8mm in diameter, are essential for the safety design of the reactor.The present study aims to investigate the effectiveness of the logarithmic method for the cases of (1) thin samples, (2) local heating by the use of small aperture, (3) samples small in diameter, and (4) samples having a cylindrical shape.The adoptability of the logarithmic method for analyzing laser-flash data on such samples of anomalous shape was tested and it was concluded that the measurements can be made with the possible error within 5%.
日本熱物性学会の論文