The Heat Exchange Simulation In The Device For Measuring The Emissivity Of Coatings And Material Surfaces

The simulation of heat exchange in the working chamber of the device for measuring emissivity was carried. It was shown that the simulation results coincide well with the experimental results. Established that, with the selected technical parameters, the contribution of the conductive-convective component of heat exchange does not exceed 0.1% of the radiation component, and therefore the measurement can be carried out without vacuuming the working chamber. Found suitable area for measurement of emissivity with unevenness of the heat flux distribution, which does not exceed ± 2%.