A calculation analysis for the ablation and heat transfer of carbon-based composite materials in combustible airflow environment

To study the ablative heat transfer mechanisms of carbon-based composite materials in the aerodynamic heating environment of combustible airflow, an analysis of chemical reaction，thermal chemical ablation and thermal response for the materials was conducted，and a calculation method for the oxidative ablation and heat transfer of the materials was present. The comparison results signified that the ablation results obtained by the calculation method were consistent with the experimental results of flat and stagnation-point ablation tests. Using this method, the ablation and temperature-field differences of carbon-based composite materials in combustible airflow and air environments, and the effects of a variety of parameters concerning pressure and components on the ablation and heat transfer were obtained. In the same thermal environment, the material surface temperature under combustible airflow is lower than that of the air environment, and the ablation back quantity is higher than the results of the air environment; with the increase in H2O and CO2 content, surface temperature and the amount of ablation back show a tendency of decrease and increase, respectively, with H2O exhibiting a greater influence.