METHOD OF DETERMINING TEMPERATURE DEPENDENCE OF EMISSIVITY FACTOR (VERSIONS)

摘要

FIELD: physics.;SUBSTANCE: invention relates to thermal physics and can be used for determination of temperature dependence of integrated emissivity factors of coatings and surfaces of solid bodies. Method involves measuring temperature on the outer and the inner surfaces of two arranged in parallel with a small gap plates from the same material at their one-sided non-stationary heating. Analyzed surfaces of the plates face each other. One of the outer surfaces of the sample is heated by a contact heater as per a specified, for example, linear law to maximum possible temperature and held at it for some time. On the second outer surface a calorimeter is set, for example, in the form of a copper sheet, which then is heat-isolated from the outer side. Measured during heating temperatures on the outer surfaces of the sample and the heat flow (and for samples with unknown thermophysical characteristics and on the inner surfaces of plates) of solving the inverse task of heat conductivity are used to obtain the desired dependence of emissivity factor within the entire temperature range. So can be investigated samples of materials both with known and unknown thermophysical characteristics.;EFFECT: technical result is reducing the amount of experimental investigations, higher reliability and accuracy of obtaining integrated emissivity factors of coatings and surfaces of solid bodies.;6 cl, 2 dwg