CPU散热器换热特性的实验研究

AN EXPERIMENTAL STUDY ON TWO KINDS OF HEAT SINKS OF CPU

本文对两种不同类型的CPU散热器,整体平直翅片与分段式的平直翅片,在不同加热功率、不同流速下的强迫风冷的传热性能进行了实验研究,得出换热系数主要和来流速度有关,而与加热功率关系不大的结论,并将二者的换热性能进行了对比。结果表明,翅片2的换热系数随流速的变化更强烈,在其他相同条件下,其换热系数甚至可以达到翅片1的两倍。

The heat transfer characteristics of two kinds of heat sinks, plain plate fins and sub-sectioned plain plate fins, are experimentally measured to investigate the forced cooling capacity of the heat sinks under different power input and approaching velocity. It is concluded that heat transfer coefficient mainly depends on the approaching velocity, and not much of the power input. The sub-sectioned plain plate fin has higher heat transfer coefficient at the cost of a little friction increasing.