Experiment Analysis of Pool Boiling Heat Transfer in Bead Packed Porous Layers
Experiment Analysis of Pool Boiling Heat Transfer in Bead Packed Porous Layers
复制标题
珠粒填充多孔层池沸腾传热实验分析
DOI：
10.1002/htj.21188
复制
发表时间：
2016-12
期刊：
影响因子：
--
通讯作者：
王记
中科院分区：
文献类型：
--
作者：
陈威;王记
对颗粒填充多孔层内的池沸腾传热进行了实验研究，分析了颗粒材料、颗粒直径和多孔层层数等因素对流动和传热系数的影响。在实验中选择了玻璃珠和铜珠，珠尺寸为4 mm和6 mm以及珠填充的多孔结构从一层到三层。对比了珠粒填充多孔结构与平板表面的池沸腾换热，分析了珠粒填充多孔层对池沸腾换热的强化作用。所收集的纯水在平表面上的实验数据与用Rohsenow关联式预测池沸腾的理论值之间的最大相对误差小于12%。此外，在不同热流密度下，采用摄像机记录了不同层数和不同材料的珠状堆积多孔结构中沸腾气泡的产生、融合和脱离对池沸腾的影响。这些研究结果为珠粒填充多孔结构在池沸腾强化传热中的推广应用提供了参考。
The heat transfer of pool boiling in bead packed porous layers was experimentally investigated to analyze the effects of the bead material, bead diameter and the layer number of the porous bed on the transport of flux and the heat transfer coefficients. The glass and copper bead, the bead sizes of 4 mm and 6 mm as well as the bead packed porous structures ranging from one to three layers were chosen in the experiments. The pool boiling heat transfer in the bead packed porous structures and that on the plain surface were compared to analyze the enhancement of pool boiling heat transfer while the bead packed porous layers were employed. The maximum relative error between the collected experimental data of the pure water on a plain surface and the theoretical prediction of pool boiling using the Rohsenow correlation was less than 12%. Besides, the boiling bubble generation, integration and departure have a great effect on the pool boiling and were recorded with a camera in the bead stacked porous structures of the different layers and materials at different heat flux. All these results should be taken into account for the promotion and application of bead packed porous structures in pool boiling to enhance the heat transfer.
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