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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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高温绝热毡有效热导率的理论分析与实验研究
Abstract:
？建立了高温绝热毡有效热导率的数值计算模型,分析了温度和压力对传热机制的影响.用高真空平板型石墨加热炉测量了纤维绝热毡平均温度高达860℃时的有效热导率,实验结果与理论计算吻合得很好.结果表明,当温度较低(＜400℃)时,高温隔热毡的固体传导在总体传热中占主导地位;当温度较高时(＞700℃),无论环境压力高低,辐射都成为材料内部主导的传热方式;当环境压力小于200pa时,可忽略气体传导的影响.
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