Abstract Heating rate is crucial to the pyrolysis process of charring materials in the thermal protection system (TPS) of spacecraft. In order to study the influence of heating rate on the thermal response of charring materials, a novel formula for pyrolysis rate of charring materials is presented on the basis of experimental results of charring materials under different heating rates and the Levenberg-Marquardt algorithm. Then combined with the pyrolysis layer model, from the numerical simulation we find an interesting result that the traditional method to determine pyrolysis rate without considering the heating rate is conservative for the design of TPS, but the novel method in this study contributes to optimization design of TPS in spacecraft.

中文翻译：

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不同升温速率下炭化材料热解率的新公式

摘要 加热速率对航天器热保护系统（TPS）中炭化材料的热解过程至关重要。为研究升温速率对炭化材料热响应的影响，基于不同升温速率下炭化材料的实验结果和Levenberg-Marquardt算法，提出了一种新的炭化材料热解速率公式。然后结合热解层模型，从数值模拟中我们发现一个有趣的结果，即传统的不考虑加热速率的确定热解速率的方法对于TPS的设计是保守的，但本研究中的新方法有助于优化设计航天器中的 TPS。