Coupled calculation of heat and mass transfer of porous media under the effects of external energy sources

Abstract

For the use of external energy sources, this paper studies the changes in physical parameters and mutual response principle of the metallic thermal protection system of aerospace crafts under rapid aerodynamic heating in atmospheric reentry. To analyze and compare the control equations of porous media under the effects of external energy sources properly built, analog simulation is conducted on the model built using COMSOL multi-physical field processing software, taking into consideration the influence of different geometrical parameters and physical parameters of porous media on the model. The simulation shows that under the effects of external energy sources, the porous media are pushed ahead along the transmission direction of external energy in the phase change range on the macro level and the substance temperature are constantly vibrating near the phase-change critical temperature within phase-change area on the micro level. It is concluded that the research on heat transfer coupling of porous medium is of great guiding significance for the transmission and heat transfer of micro-scale and other substances.