| 摘要: |
| 提出了一个近似计算多孔陶瓷等效导热系数的公式。该公式综合考虑了孔隙大小、孔队度以及气相辐射与导热的影响，可用于在任意温度下具有任意孔隙度的多孔陶瓷的等效导热系数的计算。用文献数据检验表明，该公式在高温区有较高的计算精度。 |
| 关键词: 陶瓷 多孔材料 导热性 计算方法 |
| DOI： |
| 分类号:TB321 |
| 基金项目:航空科学青年基金 |
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| APPROXIMATE CALCULATION OF EFFECTIVE THERMAL CONDUCTIVITY OF POROUS CERAMICS |
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Zheng Qingxiong, Wang Meili
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Depart. of Aerocngine,Northwestern Polytechnical Univ.,Xi’an, 710072
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| Abstract: |
| The influences of pore sizes, porosity, radiation and conduction in gas phase are analyzed on the effective thermal conductivity of porous ceramics and then a new formula is put forward based on the analysis so as to calculate approximately the effective thermal conductivity of porous ceramics at any porosity and different temperatures. The calculating results are in good agreement with between values of reference at high temperatures. |
| Key words: Ceramic porous material Thermal conductivity Calculation method |
