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首页> 外文期刊>Journal of Heat Transfer >A Semi-Empirical Heat Transfer Model for Forced Convection in Pin-Fin Heat Sinks Subjected to Nonuniform Heating
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A Semi-Empirical Heat Transfer Model for Forced Convection in Pin-Fin Heat Sinks Subjected to Nonuniform Heating

机译：加热不均匀的Pin-Fin散热器强制对流的半经验传热模型

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摘要

This paper presents a cost effective semi-empirical analytical model for convective heat transfer in pin-fin heat sinks subjected to nonuniform heating set by a circular hot gas impinging jet. Based on empirical correlations taken from the open literature, tempera-ture variations in the heat sink are obtained from the finite volume solution of the semi-empirical model. Based on a purpose-built experimental setup, measurements of a sub-strate temperature are performed using an infrared camera. These, along with the convective fluid temperature measured at the exit of the pin-fin array, are compared against analytical model predictions, with overall good agreement achieved. Subse-quently, the influences of the convection Reynolds number, substrate thickness, and ther-mal conductivity of material on the distribution of substrate temperature are quantified by the validated model. It is demonstrated that the present model is capable of predicting local thermal behaviors such as the footprints of the pin fins. In addition, with the spreading resistance captured accurately, the model can be used for the design optimi-zation of pin-fin/substrate systems subjected to nonuniform heating.
机译：本文提出了一种具有成本效益的半经验分析模型，该模型用于针状翅片散热器的对流传热，该翅片散热器受到圆形热气体冲击射流的不均匀加热设定。基于公开文献中的经验相关性，可以从半经验模型的有限体积解中获得散热器中的温度变化。基于专门设计的实验设置，使用红外热像仪对基板温度进行测量。将这些以及在针翅阵列出口处测得的对流流体温度与分析模型预测值进行比较，总体上取得了良好的一致性。随后，通过验证的模型量化了对流雷诺数，衬底厚度和材料的热导率对衬底温度分布的影响。证明了本模型能够预测局部热行为，例如引脚鳍的足迹。此外，在精确捕获扩展电阻的情况下，该模型可用于对受非均匀加热影响的针鳍/衬底系统进行设计优化。

著录项

  • 来源
    《Journal of Heat Transfer》 |2010年第12期|p.121702.1-121702.11|共11页
  • 作者

    S. S. Feng; T. Kim; T. J. Lu;

  • 作者单位

    School of Energy and Power Engineering, Xi'an JiaotONg University, Xi'an 710049, P.R. China;

    rnSV Laboratory, School of Aerospace, Xi'an JiaotONg University, Xi'an710049, P.R.China;

    rnSV Laboratory, School of Aerospace, Xi'an JiaotONg University, Xi'an710049, P.R.China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    finite volume method; heat spreading; nonuniform heating; pin-fin heat sink;

    机译：有限体积法散热加热不均匀针翅式散热器;

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