碳化烧蚀材料内部热响应的数值分析  

Numerical analysis of internal thermal response for carbonized ablation materials

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》2014年第2期139-141,共3页New Chemical Materials

摘　　要：为了揭示碳化烧蚀材料的详细热响应,运用有限元数值模拟方法建立了高温环境下碳化烧蚀材料性能分析的数值计算模型,并通过阿伦尼乌斯定律对材料的内部热解进行了分析。碳化烧蚀材料热响应计算过程中,建立了材料变物性参数计算的数学函数,并对某高硅氧酚醛复合材料的碳化烧蚀过程进行了数值模拟。结果表明:碳化烧蚀材料的热响应是多种因素综合作用的结果,随着材料内部热解,材料出现碳化层、原材料层的分层现象,材料内部发生质量损失。材料的热物理性质与碳化过程中材料温度和热解状态相关。研究方法对计算任意的碳化烧蚀具有适应性。In order to reveal the detailed thermal response of carbonized ablation materials, the numerical calculation model of the materials performance analysis under high temperature environment was achieved through the method of finite element numerical simulation, and the internal material pyrolysis were analyzed through the arrhenius law. Established mathematical function of physical property parameters under the carbonization ablative material thermal response calcula- tion process, and the carbonized ablation process of silica phenolic composite was numerical simulated. Results showed that thermal response of the materials was the result of combination of a variety of factors,with the internal material pyrolysis, the material was divided into carbide layer and original material layer, and mass loss occured in internal material. Material thermal physical properties were related to the material temperature and pyrolysis state of carbonization process. The re-search method was applicable for any carbonized ablation.

关 键 词：复合材料 碳化烧蚀 数值模拟 热解 烧蚀率 

分 类 号：TB33[一般工业技术—材料科学与工程]