碳/碳复合材料烧蚀热响应的数值分析  

Numerical analysis of ablation thermal response of carbon/carbon composites

作　　者：杨德军[1] 李旭东[1] 

机构地区：[1]兰州理工大学材料科学与工程学院,兰州730050

出　　处：《化工新型材料》2013年第10期79-81,共3页New Chemical Materials

基　　金：国家自然科学基金资助项目(50271016;50571042)

摘　　要：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 change rule of temperature field of carbon/carbon composite material under different ablation conditions is a important research content in the thermal protection system. In order to reveal the change rule of thermal response of carbon-carbon composites at different ablation rate, the transient temperature field under ablation surface receding condi- tion was analysis and researched by ALE（Arbitrary Lagrange-Euler）moving mesh and the finite element method. The finite element calculation model of ablation temperature field was established under moving boundary conditions. The result showed that the wall temperature of the material was decreased with increasing the ablation rate and the ablation of materi- als had played an effective thermal protective effect. The results met the requirements of the research program. The research method was applicable for any ablative thermal protection materials.

关 键 词：碳 碳复合材料 烧蚀性能 移动边界 烧蚀率 有限元模拟 

分 类 号：TB332[一般工业技术—材料科学与工程]