An experimental study of heat transfer in oscillating flow through a channel filled with an aluminum foam
An experimental study of heat transfer in oscillating flow through a channel filled with an aluminum foam
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DOI：
10.1016/j.ijheatmasstransfer.2004.08.025
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发表时间：
2005
影响因子：
5.2
通讯作者：
K. Leong;Liwen Jin
中科院分区：
文献类型：
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作者：
K. Leong;Liwen Jin
对恒热流下泡沫铝通道内振荡流动的换热进行了实验研究。测量了壁面温度分布、多孔通道流速和试验段压降。分析了多孔通道内的压降特性、无因次位移振幅和无因次振荡频率对换热的影响。结果表明，在振荡流中，多孔介质的平板通道中的传热显着增强。循环平均局部Nusselt数随雷诺数Reω和流动位移无量纲振幅A0的增大而增大。当A0=3.1-4.1时，通过将动力学雷诺数从178增加到874，长度平均努塞尔数有效地增加。根据实验数据，得到了L/Dh=3的多孔通道的长度平均努塞尔数与无量纲参数Reω和A0的关联式。
An experimental study has been conducted on the heat transfer of oscillating flow through a channel filled with aluminum foam subjected to a constant wall heat flux. The surface temperature distribution on the wall, velocity of flow through porous channel and pressure drop across the test section were measured. The characteristics of pressure drop, the effects of the dimensionless amplitude of displacement and dimensionless frequency of oscillating flow on heat transfer in porous channel were analyzed. The results revealed that the heat transfer in oscillating flow is significantly enhanced by employing porous media in a plate channel. The cycle-averaged local Nusselt number increases with both the kinetic Reynolds number Reωand the dimensionless amplitude of flow displacement A0. The length-averaged Nusselt number is effectively increased by increasing the kinetic Reynolds number from 178 to 874 for A0=3.1–4.1. Based on the experimental data, a correlation equation of the length-averaged Nusselt number with the dimensionless parameters of Reωand A0is obtained for a porous channel with L/Dh=3.