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首页> 外文期刊>International Journal of Heat and Mass Transfer >Constructal design and experimental validation of a non- uniform heat generating body with rectangular cross-section and parallel circular cooling channels
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Constructal design and experimental validation of a non- uniform heat generating body with rectangular cross-section and parallel circular cooling channels

机译：具有矩形横截面和平行圆形冷却通道的非均匀发热体的构造设计和实验验证

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摘要

Non-uniform heat generating phenomenon is omnipresent in real electronic devices. A three-dimensional model with non-uniform heat generation is established in this paper. Both fluid flow and heat transfer behaviors are uncovered with the consideration of constructal theory. Constructal theory enables a heat transfer system to evolve and generate to provide a better flow access for the currents that flow through it. Taking a complex function composed of hot spot temperature and pumping power as the performance indicator, the diameter of cooling channels and the aspect ratio of elemental body are optimized as two degrees-of-freedom. The physical problem is numerically solved by resorting to the finite element method. The optimization was performed by the exhaustive search technique, comparing all results generated by finite element method. The heat generation over the entire body and the volume ratio of cooling channels operate as the prior constraints. On this basis, the optimal geometries of the elemental component are obtained in cases of various heat generating premises. The obtained results demonstrate that the complex function behaves an extreme value for the dimensionless cooling channel diameter. It is observed that the minimum value of the complex function slumps by 29.3% as the number of elements increases from 10 to 30. The overall thermo-fluid performance of the non-uniform heat generating body can be elevated as the elemental body features a square cross-section by releasing the new degree-of-freedom of aspect ratio to morph. Furthermore, alumina ceramics are used as the heat generating substrate and water as the coolant. The validity of the mathematical model is corroborated by experiments. Oriented to industrial applications, it is implied that the coolant entryway should be placed prone to the place where more electronic components or heat generating devices situate. The optimization results can put new suggestions on the thermal design of actual electronic devices from both theoretical and experimental perspectives.
机译：在真正的电子设备中是非均匀的发热现象是无所不在的。本文建立了一种具有非均匀发热的三维模型。考虑到构造理论，揭示了流体流动和传热行为。构造理论使传热系统能够发展和产生以提供流过它的电流的更好的流动访问。采用由热点温度和泵送功率组成的复杂功能，作为性能指示灯，冷却通道的直径和元素体的纵横比优化为两度自由度。通过诉诸有限元方法，物理问题在数量上解决。优化由穷定的搜索技术进行，比较有限元方法产生的所有结果。整个主体上的发热和冷却通道的体积比作为先前的约束。在此基础上，在各种发热场所的情况下获得元素部件的最佳几何形状。所得结果表明，复杂功能对无量纲冷却通道直径表示极值。观察到，随着元件数量从10到30增加，复杂功能坍塌的最小值坍落度为29.3％。由于元素体具有正方形，因此可以升高非均匀发热体的总热流体性能横截面通过释放与变形的新的纵横比自由度。此外，氧化铝陶瓷用作发热基板和作为冷却剂的水。实验证实了数学模型的有效性。导向到工业应用，暗示冷却剂入口应容易发生更多电子元件或发热器件的位置。优化结果可以对实际电子设备的热设计提出新的建议和实验视角。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2020年第2期|119028.1-119028.15|共15页
  • 作者

    Jiang You; Huijun Feng; Lingen Chen; Zhihui Xie; Shaojun Xia;

  • 作者单位

    Institute of Thermal Science and Power Engineering Wuhan Institute of Technology Wuhan 430205 PR China School of Mechanical & Electrical Engineering Wuhan Institute of Technology Wuhan 430205 PR China College of Power Engineering Naval University of Engineering Wuhan 430033 PR China;

    Institute of Thermal Science and Power Engineering Wuhan Institute of Technology Wuhan 430205 PR China School of Mechanical & Electrical Engineering Wuhan Institute of Technology Wuhan 430205 PR China;

    Institute of Thermal Science and Power Engineering Wuhan Institute of Technology Wuhan 430205 PR China School of Mechanical & Electrical Engineering Wuhan Institute of Technology Wuhan 430205 PR China;

    College of Power Engineering Naval University of Engineering Wuhan 430033 PR China;

    Institute of Thermal Science and Power Engineering Wuhan Institute of Technology Wuhan 430205 PR China School of Mechanical & Electrical Engineering Wuhan Institute of Technology Wuhan 430205 PR 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

    Constructal law; Heat convection; Rectangular heat generating body; Non-uniform heat generating; Cooling channels; Generalized thermodynamic optimization;

    机译：建设法;热对流;矩形发热体;不均匀的发热;冷却通道;广义热力学优化;

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