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| Impact of Carbon Dioxide Aeroheating on the Ablation Performance of Charring Thermal Protective Materials |
| Received:October 29, 2019 Revised:November 10, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2020.01.008 |
| KeyWord:carbon dioxide aeroheating charring thermal protective materials ablation modeling |
| Author | Institution |
| DENG Dai-ying |
China Academy of Aerospace Aerodynamics, Beijing , China |
| LUO Xiao-guang |
China Academy of Aerospace Aerodynamics, Beijing , China |
| CHEN Si-yuan |
China Academy of Aerospace Aerodynamics, Beijing , China |
| YU Ji-jun |
China Academy of Aerospace Aerodynamics, Beijing , China |
| AI Bang-cheng |
China Academy of Aerospace Aerodynamics, Beijing , China |
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| Abstract: |
| The paper aims to study the carbonized layer ablation mechanism of lightweight class pyrolytic heat material in aerodynamic heating environment of high enthalpy CO2. The ablation performance predicting method considering the kinetics of reaction was established and used to analyze the charring layer ablation mechanism under high temperature carbon dioxide. The difference of the materials ablation performance between the carbon dioxide and air aeroheating was analyzed. The impact of carbon dioxide dissociation, and the mass flow and composition of the pyrolysis gases on the materials ablation was obtained through computing. When the gas pressure and the wall temperature reached 1.0×105 Pa and 3000 K, the non-dimensional ablation rates under the CO2 and air were 0.26 and 0.17, respectively. The non-dimensional ablation rate of the materials become higher with the increase of temperature, pressure, or dissociation degree of CO2, and the reduction of the mass flow rate of the flow or pyrolysis gases or the non-dimensional ablation rate of the materials. The heat of ablation changes at the meantime. |
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