空天防御2025，Vol.8Issue(2)：93-102,10.
酚醛树脂基复合材料热响应模型及裂解参数影响分析
Numerical Simulation of Ablation Heat Transfer of Resin-Based Thermal Protection Materials and Analysis of the Influence of Some Reaction Parameters
摘要
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.关键词
树脂基热防护材料/热解/热响应模型/灵敏度分析/热重分析/MD模拟Key words
resin-based thermal protection materials/pyrolysis/thermal response model/sensitivity analysis/thermogravimetric analysis/MD simulations分类
化学化工引用本文复制引用
张亚运,王利达,牛波,龙东辉..酚醛树脂基复合材料热响应模型及裂解参数影响分析[J].空天防御,2025,8(2):93-102,10.基金项目
中国航天科技集团有限公司上海航天科技创新基金资助项目(SAST2019-011) （SAST2019-011）
