Thermal response of carbon-base and char material in a nitrogen arcjet heating condition was studied experimentally and numerically. The arcjet experiments were performed using a 1MW constrictor-type arcjet wind tunnel. Radiative transfer in the carbon-based and char materials were modeled using an effective radiative conductivity. The radiative conductivity value was evaluated through a radiative extinction coefficient deduced from a ray-tracing calculation with X-ray CT models for the carbon-based and char materials. Preliminary material thermal response calculations were carried out to examine the validity of the radiative conductivity obtained. Comparison of the in-depth temperature between calculation and measurement showed that the difference in the thermal response between the carbon-based and char materials can be replicated when the radiative conductivity is included in the calculation and if an exmerimental heating condition is also appropriately imposed.
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