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不同烧蚀工况下碳/碳复合材料温度场的变化规律是烧蚀热防护系统的重要研究内容。为了揭示在不同烧蚀率下碳/碳复合材料热响应规律,采用ALE(Arbitrary Lagrange-Euler)理论为基础的动网格方法,结合有限元方法对烧蚀表面退缩条件下碳/碳复合材料瞬态温度场进行了分析和研究。建立了移动边界条件下烧蚀温度场计算的有限元计算模型。结果表明,C/C复合材料的壁面温度随着烧蚀率的增大而减小,材料的烧蚀有效的起到了热防护效果。计算结果满足研究项目要求,研究方法对任意的烧蚀热防护材料均具有适应性。
The variation of temperature field of carbon / carbon composite under different ablation conditions is an important research content of ablation thermal protection system. In order to reveal the thermal response of carbon / carbon composites at different ablation rates, a dynamic mesh method based on the ALE (Arbitrary Lagrange-Euler) theory was used in combination with the finite element method to simulate the carbon / carbon composite under ablation surface abatement The transient temperature field is analyzed and studied. The calculation model of ablation temperature field under moving boundary condition is established. The results show that the wall temperature of C / C composites decreases with the increase of ablation rate, and the ablation of materials effectively plays the role of thermal protection. The calculation results meet the requirements of the research project, and the research methods have adaptability to any ablative heat protection material.