カーボンモノリスアブレータの作製と損耗特性の評価

抄録

As a novel thermal protection system (TPS) for re-entry vehicles, a carbon monolith ablator (CMA) was fabricated by impregnation of acrylic resin into porous carbon monolith. To evaluate their performance of CMA and porous carbon monolith, thermal response and recession resistance were evaluated using an arc wind tunnel. Compared to carbon monoliths without impregnation resin, CMAs showed that heating rate of surface temperature decreases owing to the decomposition of acrylic resin, which is an endothermic reaction and well known as a factor of ablation effect. The temperature at 20 mm and 30 mm depth from surface increased with the increase of density. On the other hand, the effective ablation heat, which is an indicator of the recession resistance improved at low heat flux (<5 MW/m²). Contrary, the effective ablation heat of CMA for heat flux of >5 MW/m² is not improved compared to carbon monolith and discussion will be carried out for this phenomenon.