Determination of true temperature of opaque matter based on its thermal radiation spectrum: Using relative emissivity and the Wien displacement law

30th International Conference on Interaction of Intense Energy Fluxes with Matter

Rusin, S.P.^1

Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya 13, Moscow

125412, Russia^1

关键词: Gray body;    Parametric modeling;    Spectral emission;    Spectral emissivity;    Thermal radiation spectra;    True temperatures;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/653/1/012102/pdf
DOI  :  10.1088/1742-6596/653/1/012102

来源: IOP

【 摘 要 】

Two methods for determining of the true (thermodynamic) temperature via thermal radiation spectrum of an opaque heated object are presented. The first method is based on the relative emissivity. It is shown that in many cases, the range of the true temperature values may be narrowed down using the "convex-concave" criterion. As shown, that any relative spectral emissivity dependence can be approximated by the same parametric model. The second method is based on the use of the Wien displacement law for real materials. This method is effective when the radiation of the object close to the gray-body radiation in the region of the spectral emission maximum. It is shown that these two methods complement each other.