| 高温隔热纤维结构材料绝热特性分析 |
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| 引用本文： | 张进,郝英立.高温隔热纤维结构材料绝热特性分析[J].能源研究与利用,2009(5):5-9. |
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| 作者姓名： | 张进 郝英立 |
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| 作者单位： | 东南大学能源与环境学院,南京,210096 |
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| 基金项目： | 教育部基础研究基金资助项目 |
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| 摘 要： | 高温隔热纤维结构的绝热特性是决定金属热防护系统工作性能的关键因素。文中应用有限元法及有限容积法对理想化的纤维结构模型进行了数值研究，得出了纤维结构内部稳态下的温度场、热流场及速度场分布，并在此基础上计算得到纤维结构的等效导热系数，分析了温度、内部气体压力以及纤维结构密度对等效导热系数的影响。所建物理模型和分析方法可行，计算结果与实验结果吻合较好。
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| 关 键 词： | 高温隔热纤维结构 等效导热系数 纤维结构密度 内部气体压力 |
Analysis of Thermal Insulation Characteristics of High-temperature Insulation Fiber Structure Materials |
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| ZHANG Jin,HAO Ying-li.Analysis of Thermal Insulation Characteristics of High-temperature Insulation Fiber Structure Materials[J].Energy Research and Utilization,2009(5):5-9. |
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| Authors: | ZHANG Jin HAO Ying-li |
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| Abstract: | The insulation properties of high-temperature insulation fiber structure is the key factor to determine the performance of metallic thermal protection system. In this paper, finite element method and finite volume method are used, and numerical study of idealized fiber structure is made. Temperature field, heat flow field and velocity field under steady-state are obtained. Based on the above, effective thermal conductivity of fiber structure is calculated. The impacts , which come from temperature, internal gas pressure and density of fiber structure, of the effective thermal conductivity are analyzed. Physical model built and analysis method are feasible, what is more, results are in good agreement with experimental results. |
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| Keywords: | high temperature fibrous insulation effective thermal conductivity density of fibrous structure internal gas pressure |
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