Modeling of the Combined Heat Protection and Thermal Control Systems 981638

Mathematical models of the combined thermal protection systems of the radiation-evaporation type are proposed. The systems considered consist of an outer heat-resistant screen sensitive to force loading, a high-temperature porous insulation, and a layer of a material saturated with a coolant and arranged on the external surface of the protected structure. Appropriate coupled boundary-value problems describing heat and mass transfer in these systems are formulated and solved. Combined and passive radiation thermal protection systems are compared. It is shown that both the thermal insulation thickness and the total weight of the combined heat protection systems may be considerably less then the passive equivalents.


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