CFRP composite laminates decompose by pyrolysis/oxidation when exposed to high heat fluxes. While gaseous and solid residues created within the composite material are ignored in most models, a multi-species approach is proposed to describe transient decompositions from the virgin to the final charred state of the material. The model is based on a porous medium description that includes gas creation and transport within the laminate, respectively driven by Arrhenius and Darcy’s laws. Orthotropic heat transfer and decomposition gas transport within the laminate up to the surface remain often uninvestigated while it can drastically act upon the dynamics of a fire event. An experiment is carried out to analyze multi-dimensional heat and mass transfer during the charring processes of a composite laminate exposed to a high power laser beam. Transient temperature measurements on the unexposed surface of the material are confronted to 3D unsteady numerical results to validate the model formulation.

中文翻译：

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分解碳纤维/环氧树脂复合材料层压板内传热传质的数值模拟和实验验证

当暴露于高热通量时，CFRP 复合材料层压板会因热解/氧化而分解。虽然在大多数模型中忽略了复合材料内产生的气态和固态残留物，但提出了一种多物种方法来描述材料从原始状态到最终烧焦状态的瞬态分解。该模型基于多孔介质描述，包括层压板内的气体产生和传输，分别由阿伦尼乌斯定律和达西定律驱动。层压板内向表面的正交各向异性传热和分解气体传输通常未被研究，但它可以极大地影响火灾事件的动态。进行了一项实验来分析暴露于高功率激光束的复合材料层压板的炭化过程中的多维传热和传质。材料未暴露表面上的瞬态温度测量需要面对 3D 非稳态数值结果来验证模型公式。