摘要
分析了耐火纤维绝热材料的换热特性。建立了一个纤维材料有效导热系数与平均温度、空气导热系数、纤维材料密度和衰减系数的理论关系式。以硅酸铝耐火纤维为试样,通过实验得出衰减系数与温度、密度的关系。理论式与实验结果吻合。
An analysis has been conducted to study heat transfer perfor-mance in the fibrous insulations.An analytical expression is presented,whichrelates the effective thermal conductivity with mean temperature,air thermalconductivity,density and extinction coefficient of the insulations.The rela-tion of extinction coefficient which depends on temperature and density wasobtained from the experiment for the ceramic fiber segment.The expressionis satisfactorily in agreement with the measurement data.
基金
国家自然科学基金
5860062
关键词
耐火纤维
硅酸铝
绝热性能
fibrous insulation
effective thermal conductivity
extinction coefficient
thermal radiation
heat conduction
