Abstract
Present study is introducing the thermal-response analysis and arc-heated wind tunnel experiments were carried out to study the effect of the pyrolysis gas flow inside the heating ablator. The analysis treated the heating process of arc-heater and the thermal-response analysis code included heat conduction, pyrolysis of resin, pyrolysis gas flow, and surface recession due to chemical reactions. In this study, the pyrolysis gas flow was treated as the multi-dimensional (axisymmetric) and unsteady phenomenon. This computation showed that the detailed analysis considering the multi-dimensional pyrolysis-gas flow and the flow injection of pyrolysis gas led to improvement of the predictive performance for the ablator thermal response. In addition, the temperature measurements inside and surface of the light-weight ablator were carried out It was used two type ablator in this experiment. As for one, surfaces were coated and the other was non-coated.
