Abstract
The paper presents the results of work on the creation and development of a numerical thermal infrared radiator based on a tubular halogen lamp KGT-220-1300, used during thermal vacuum tests of spacecraft. To develop a model and solve the problem of radiant-conductive-convective heat transfer, the Thermal Model Generator software was used. The analysis of temperature fields was carried out using a thermal imaging camera. Variants of calculations for the functioning of the radiator at different values of the supply voltage are performed. The results of mathematical modeling using band approximation of the properties of the system elements together with the Monte Carlo method in solving the problem of heat exchange by radiation of the incandescent body-quartz bulb-reflector system have shown high efficiency. The reliability of the developed model is considered in the context of an experiment conducted to measure temperature fields on a plate, which acts as an object of control interacting with radiation, and a thermal imaging camera is an instrument of thermal control. The availability of such a model at the disposal of developers of spacecraft thermal regime systems is an important step in a comprehensive work aimed at conducting end-to-end mathematical modeling of spacecraft thermal regimes, and will also allow it to be used for design calculations of radiation simulators.
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