基于热线法的松散煤体导热系数测量及数值模拟研究

发布时间：2018-06-20 09:15

本文选题：煤自燃 + 松散煤体　；参考：《煤炭科学技术》2017年11期

【摘要】：针对热线法数据处理只能得到导热系数,而无法掌握松散煤体温度场分布的现状,在试验的基础上采用Fluent数值模拟方法对试样筒中2种不同粒径煤样的温度分布情况进行研究。结果表明:通过温度场分布图可以判断热线与松散煤体热量传递所处阶段,结合试验测量数据较为准确地得出导热系数;松散煤体导热系数较小,温度传递范围较小,适宜选用小尺寸的试验装置进行试验。数值模拟结合热线法可以在得出导热系数的同时了解温度的分布情况,对试验数据的精准拟合和试验装置尺寸设计具有参考意义。
[Abstract]:In view of the fact that the thermal conductivity can only be obtained by hot wire method and the temperature field distribution of loose coal body can not be grasped, fluent numerical simulation method is adopted to study the temperature distribution of two kinds of coal samples with different particle sizes in the sample tube. The results show that the stage of heat transfer between hot wire and loose coal can be judged by temperature field distribution map, and the thermal conductivity of loose coal is smaller and the range of temperature transfer is smaller, combined with the experimental data, the thermal conductivity of loose coal is smaller and the temperature transfer range is smaller. It is suitable to select the small size test device for the test. The numerical simulation combined with the hot wire method can get the thermal conductivity and the temperature distribution at the same time, which has reference significance for the accurate fitting of the test data and the design of the size of the test device.
【作者单位】：华北电力大学能源与动力工程学院;
【分类号】：TD752.2

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