化工进展2017，Vol.36Issue(z1)：58-63,6.DOI:10.16085/j.issn.1000-6613.2017-1465
微通道形状对自相似热沉综合性能的影响分析
An investigation on the influence of the microchannel shape on performance of a self-similar micro-channel heat sink
摘要
Abstract
As a new design of heat sink,Self-similarity microchannel heat sink (SSHS)has a better overall performance than a common Microchannel heat sink (MHS).The manifold channel of the SSHS was modified to a contracting tapered one in our previous work,making an improved internal flow distribution.A further numerical work in current work was carried out to analyze the influence of the microchannel (overflow channel) shape on the flow and heat transfer process inside a self-similar heat sink.The results showed that there exists a relatively large low velocity region in the overflow channel,resulting in the uniform heat transfer process wherein.With changing the rectangular microchannel to a trapezoid one,the low velocity region could be reduced,realizing a more uniform flow and heat transfer process inside the microchannel.With the mw decreasing,the proportion of the low velocity region was reduced further and the uniformity in heat exchange was improved accordingly.In the meantime,this optimization scheme had little effect on flow resistance.The heat transfer uniformity was increased about 15%with a sacrifice of the increase in flow resistance no more than 5%with the flow rate covering 0.18—1.8kg/h.关键词
自相似热沉/微通道/渐縮式分流通道/数值模拟/梯形/传热Key words
self similarity heat sink/microchannel/tapered manifold channel/numerical simulation/trapezoid/heat transfer分类
能源科技引用本文复制引用
王喆,孙立成,刘洪涛,唐继国,鲍静静..微通道形状对自相似热沉综合性能的影响分析[J].化工进展,2017,36(z1):58-63,6.基金项目
国家自然科学基金项目(51376052,51606130,51506099). （51376052,51606130,51506099）
