Analyses of Spectral Emissivity in Radiation Temperature Measurement
FU Tai-ran1,CHENG Xiao-fang2,ZHONG Mao-hua1,YANG Zang-jian2
1. China Academy of Safety Science & Technology, Beijing 100029, China 2. Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, China
Abstract：The complexity of the spectral emissivity of actual surfaces is the key point in the research and applications of radiation temperature measurement, resulting in the difficulty in the achievement of the temperature measurement. In the present paper, based on the discussions of the Taylor expansion, the non-dimension wavelength and the exponent, the authors describe the mathematical expression of the spectral emissivity of actual surfaces, and establish the general spectral emissivity function. Through the fitting of experimental data of the spectral emissivities of different metals at different temperatures, the applicability of the spectral emissivity function is verified which especially becomes the fundamental in the research of primary spectrum pyrometry.
Key words：Radiation temperature measurement;Spectral emissivity;Temperature;Primary spectrum pyrometry
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