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›› 2017, Vol. 17 ›› Issue (1): 58-63.DOI: 10.12034/j.issn.1009-606X.216247

• 流动与传递 • 上一篇    下一篇

不同结构细小槽道热沉流量均匀性

鲁进利,赵伟,池帮杰,韩亚芳,钱付平   

  1. 安徽工业大学建筑工程学院
  • 收稿日期:2016-07-12 修回日期:2016-08-15 出版日期:2017-02-20 发布日期:2017-02-22
  • 通讯作者: 鲁进利 lujinli@sina.cn

Flow Uniform of Mini-channel Heat Sink with Different Structures

LU Jin-li ,ZHAO Wei ,CHI Bang-jie ,HAN Ya-fang ,QIAN Fu-ping   

  1. School of Civil Engineering and Architecture, Anhui University of Technology
  • Received:2016-07-12 Revised:2016-08-15 Online:2017-02-20 Published:2017-02-22
  • Contact: LU Jin-li lujinli@sina.cn

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摘要： 以纯水为传热介质，通过数值模拟研究了热沉进出口方式、联箱结构、槽道高宽比等参数对平行细小槽道热沉内部工质流量分配均匀性及传热系数的影响. 结果表明，I型进出口方式、矩形联箱结构的流量分配均匀性优于其它结构，流量分配不均匀度最小(方差为0.071)；保持通道当量直径不变时，改变槽道高宽比对热沉底面平均温度影响不大，对表面传热系数影响较大，高宽比r由1增大到5时，传热系数提高了23.9%；基于场协同理论，速度与温度梯度之间的协同角随高宽比增大而减小，表明传热得到强化.

关键词: 热沉, 传热特性, 流量分配均匀性, 场协同理论

Abstract: Numerical simulation is conducted using pure water as medium to investigate the flow distribution and convective heat transfer characteristic in parallel mini-channel heat sink. The effect of inlet and outlet arrangements, header structure and aspect ratio of channel on flow distribution and heat transfer are analyzed. The results showed that the flow uniformity of heat sink with I-type and rectangular header structure is better than other structures, and has the minimum standard deviation of mass flow rate (SI=0.071). For the same hydraulic diameter, the aspect ratio of channel has a little effect on average temperature of heat surface, whereas it has a significant effect on heat transfer coefficient, and the convective heat transfer coefficient improve 23.9% when the aspect ratio changed from 1 to 5. Base on field synergy principle, the synergy angle between the velocity and temperature field decrease with the increasing of aspect ratio, it suggest that heat transfer is enhanced.

Key words: heat sink, heat transfer characteristic, flow distribution uniformity, field synergy principle