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| Numerical Simulation of Ablation Heat Transfer of Resin-Based Thermal Protection Materials and Analysis of the Influence of Some Reaction Parameters |
| ZHANG Yayun， WANG Lida， NIU Bo， LONG Donghui |
| 1. Key Laboratory of Chemical Engineering for Multiphase Structural Materials， East China University of
Science and Technology， Shanghai 200237， China |
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Abstract Resin-based ablation material is an essential part of the thermal protection system of hypersonic aircraft. Based on the Arrhenius and Fourier thermal conduction equations, a new one-dimensional thermal response model was constructed on the structure of the Carbonifer-pyrolysis layer and the original material layer. The thermal response process based on the material ablation process was systematically studied, and the model's accuracy was verified by comparing it with mature cases. Based on the established model, the parameter sensitivity analysis was carried out on the reaction parameters’ activation energy and pyrolysis enthalpy change. It was found that reducing the activation energy and increasing the generation rate of pyrolysis gas can take away more heat inside the material. Besides, the increased pyrolysis enthalpy will especially significantly impact the material area near the back where the pyrolysis gas flows less, causing the back temperature to rise instead of falling. The balance between activation energy and pyrolysis enthalpy should be considered when optimising ablative thermal protection materials from the point of view of pyrolysis kinetics. In addition, the kinetic data obtained by thermogravimetric（TG） experiments and molecular dynamics (MD) simulations were consistent in the materials' thermal response, revealing the model's broad applicability. This paper provides a theoretical basis for the rational development of ablative materials across scales, from molecular structure to surface thermal response.
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Received: 08 December 2023
Published: 23 May 2025
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2025, Vol. 8 
