MODELING OF INFRARED RADIATION PROPAGATION THROUGH THERMAL INSULATION SURFACES
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Abstract
The development of materials for blocking infrared radiation, provided there are several layers with different thermophysical characteristics, requires large amounts of experimental research. Therefore, it is advisable to automate this process. This is possible due to the modeling of heat flow through the layered material. The purpose of the research is a modeling of the passage heat flow through a material made of layers different thermophysical properties and verification of the modeling results. Results of the research: Modeling of the passing heat flow through a layered structure with different thermophysical properties of individual layers was carried out. An air gap of small thickness was assumed between the layers of materials. Changes in the temperature of the outer layer were determined depending on the time of heat passing through the layered structure. The obtained dependences of temperature changes of each layer in time and space. The obtained easy-to-use graphical dependencies are suitable for the designing a protective material with the required properties. The temperature gradient between the heat source and the outside space was taken into account. The modeling results were verified using a calibrated infrared radiation detector. It was established that the application of modeling allows to choose the thermophysical characteristics of individual layers the material, which ensure the temperature of the outer layer and is equated to the temperature of the environment. A comparison of the manufactured material with known analogues showed that it has better protective properties with a smaller thickness. Conclusions: The application of the modeling heat flow propagation through a layered structure with different thermophysical properties of individual layers allows designing protective materials depending on operating conditions.
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References
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