泡沫金属具有非常大的比表面积和良好的导热性能,在强迫对流情况下,具有很强的换热能力.通过建立泡沫金属在强迫对流的情况下的换热模型,得到了泡沫金属高度、孔密度、孔隙率和空气流速的变化对其换热性能的影响.分析结果显示:增大泡沫金属换热器的高度、孔密度、空气流速和减小孔隙率,都能提高换热器的换热性能；当这4个参数各自变化到一定的数值后,泡沫金属的换热性能趋向于定值.这为实际应用中综合考虑泡沫金属换热器换热性能及成本提供一定的指导意义.%Porous metal foam presents excellent heat transfer performance in forced convection, because it has large specific surface area and good thermal conductivity. A mathematical model of heat transfer in porous metal foam under forced convection conditions was built, and the effects of the porous metal foam height, pore density, porosity, and air velocity on the heat transfer performance were investigated. The analysis results show that the heat transfer increases with the increase of porous metal foam height, pore density, air velocity, decreases as the porosity increases. While any one of the four parameters approaches to some values, the heat transfer of the porous metal foam becomes unchanged. The study can provide guidance for the application of the porous metal foam heat transfer and the cost in applications.
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