A numerical study on the influence of insulating layer of the hot disk sensor on the thermal conductivity measuring accuracy
A numerical study on the influence of insulating layer of the hot disk sensor on the thermal conductivity measuring accuracy
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DOI：
10.1504/pcfd.2013.053660
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发表时间：
2013-05
影响因子：
0.7
通讯作者：
Hu Zhang;Yu Jin;W. Gu;Zengyao Li;W. Tao
中科院分区：
文献类型：
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作者：
Hu Zhang;Yu Jin;W. Gu;Zengyao Li;W. Tao
对热盘传感器绝缘层对热导测量精度的影响进行了数值研究。结果表明，在暂态平面源法中可以排除接触热阻和绝缘层的影响。Kapton5501和MICA5082传感器对不锈钢和陶瓷的测量误差均小于3%，而硅气凝胶的测量误差增加到54.2%，这是因为MICA5082传感器一侧的热损失比例较大。仿真结果表明，增大传感器的半径可以提高传感器侧的散热，提高精度。
A numerical study on the influence of the insulation layer of the hot disk sensor on the thermal conductivity measuring accuracy has been conducted. It is found that the influences of the thermal contact resistance and the insulating layer could be excluded in the transient plane source method. Both the kapton5501 and the mica5082 sensor could measure stainless steel and ceramic with a deviation less than 3% while the deviation increases to 54.2% of silica aerogel because of the large heat loss proportion through the mica5082 sensor side. The simulation proved that the heat loss through sensor side and accuracy could be improved by increasing the radius of the sensor.