中文摘要：

在普通肋片散热器每两个翅片间烧结金属泡沫,设计了一种用于功率模块冷却的金属泡沫散热器结构。提出了适用于金属泡沫散热器有效导热系数计算模型,建立了金属泡沫散热器的数学模型。对比改造前后的两类散热器发现：在恒定热流密度条件下,金属泡沫散热器不存在热量累积现象。金属泡沫的散热器的换热系数是同等几何参数肋片散热器的3.6倍。在相同压降时,泡沫散热器中的空气流速要低于肋片散热器。在风扇功率相同的情况下,四个翅片的金属泡沫散热器收益因子比同等条件的肋片散热器高出了约20%。

英文摘要：

Metal foams were sintered in the origin finned heat sink,some novel metal foam heat sink was obtained for the large power module cooling.The effective heat conducting coefficient model was gained,and it was proposed the foam heat sink computational model.Contrasted to two kinds of the heat sink,it was obtained that the heat accumulated was absent in the condition of the constant heat flow density.Compared to the same parameter finned heat sink,the heat transfer coefficient of the metal foam heat sink could be enhanced by about 3.6 times in the same drop pressure;the air velocity of the metal foam heat sink was lower than that of the finned heat sink.The income factor of the finned metal foam heat sink with 5PPI four fins was greater about 20% than that of the optimum finned heat sink in the same fan power.