Nonlinear analysis for thermal conduction in carbon/carbon composites with ablation

Carbon/carbon(C/C)composites are often used in heat-resistant layers of aircrafts with a high Mach number as they can withstand a high temperature, yet which may be ablated due to high pressure and heat flow. According to Fourier heat transfer law and high temperature ablation mechanism, we utilized FORTRAN programming to calculate and analyze the performance of thermal conduction in C/C plates with ablation, considering the thermal conductivity of C/C composites as a function of temperature at high temperature. The results show: when lower heat flow acts, compared with that the thermal conductivity is constant, the temperature change rate of object surface is different from that of interior; over time, the surface temperature is gradually consistent, but the back temperature is distinct extremely; the distribution trend of object interior temperature is basically same. When higher heat flow acts, the ablation phenomenon occurs on the surface, at the same time, the temperature rapidly increases, which will maintain dynamic equilibrium.