基于Icepak的叉排式CPU散热器数值模拟李雪丽.pdf

基于Icepak 的叉排式CPU 散热器数值模拟 [周俊杰 李雪丽] [郑州大学化工与能源学院，450001] 【摘要】随着高效紧凑的要求，笔记本散热问题是研究的焦点，CPU 散热问题是设计电子器件首要考虑的 问题，但是市场上的各式各样的散热器并不能真正的解决散热问题。本文基于电子热分析软件Icepak 对笔 记本电脑叉排式散热器风冷散热进行数值模拟，研究叉排式散热器在不同翅片高度、不同间距及不同厚度 情况下的散热效果。应用边界层理论，翅片高度、间距及厚度会影响边界层的流动状态和边界层厚度，进 而会影响散热。通过数值模拟研究结果可知：随着翅片高度的增加散热速率较大，在10mm 左右散热效率最 大；在一定翅片长度、高度及厚度情况下，随着翅片间距增加，散热效率增加，间距为6-8mm 时散热较好； 随着翅片厚度的增加,散热效率增加在厚度为2mm 时达到散热最优。 【关键词】风冷散热；Icepak；CPU 散热器；翅片 Numerical Simulation of Staggered CPU cooler based on Icepak [Junjie Zhou, Xueli Li] [School of chemical and energy, Zhengzhou University,450001] [ Abstract ] With the compact and efficient requirements, laptop cooling problem is the focus of research. CPU cooling problem is the primary consideration in designing electronic devices, but the wide range of radiators on the market does not really solve the heat problem. Numerical simulation the effect of air cooling based on the electronic thermal analysis software Icepak on the laptop Staggered radiator, and study cooling effect at different heights, different spacing and different thickness conditions. By application of boundary layer theory, the fin height, spacing and thickness will affect the flow conditions and boundary layer thickness, and then will affect the heat. The results showed that when the fins’ altitude increases, the rate of heat dissipation became larger, and the thermal efficiency is maximum while the fin’s height is about 10mm; When the fin length ,height and thickness is constant, the cooling efficiency will increase following the fin spacing.The cooling efficiency is better when the fin spacing is between 6mm and 8mm;The cooling efficiency is the best when the fin thickness is 2mm. [ Keyword ]Air cooling;