Thermophysics and Aeromechanics

, Volume 25, Issue 1, pp 133–144 | Cite as

Using spectral distribution of radiance temperature and relative emissivity for determination of the true temperature of opaque materials

  • S. P. Rusin


A method for determining the thermodynamic (true) temperature of opaque materials by the registered spectrum of thermal radiation under the conditions when we do not know emissivity of a free-radiating body is presented. A special function, which is a product of relative emissivity of tungsten by the radiation wavelength, was used as the input data. The accuracy of results is analyzed. It is shown that when using relative emissivity, the proposed algorithm can be used both within the range of applicability of the Wien approximation and the Planck formula.


true temperature spectrum of thermal radiation relative emissivity 


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© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  1. 1.Joint Institute for High Temperatures RASMoscowRussia

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