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A study on the hydraulic and thermal characteristics in fractal tree-like microchannels by numerical and experimental methods

机译：分形树状微通道水力和热力特性的数值和实验研究

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摘要

This paper focused on the hydraulic and thermal characteristics of fractal tree-like microchannels with different ARs (aspect ratios) for the Reynolds numbers ranging from 150 to 1200. And the fractal micro-channels with two branches and straight microchannels with the same heat transfer area were also compared in terms of the pressure loss, mean heat transfer coefficient, and COP (coefficient of performance). The experimental results showed that the fractal tree-like microchannels had a much higher heat transfer coefficient than that of straight microchannels at the cost of a much higher pump power. And for fractal and straight microchannels, the AR of microchannels was also found to have a relatively large impact on both the pressure loss and heat transfer.
机译：本文重点研究了具有不同ARs（纵横比）的分形树状微通道的水力和热特性，其雷诺数范围为150至1200。以及具有两个分支和相同传热面积的直形微通道的分形微通道。还比较了压力损失，平均传热系数和COP（性能系数）。实验结果表明，分形树状微通道的传热系数要比直形微通道的传热系数高，而泵浦功率却高得多。对于分形和笔直的微通道，还发现微通道的AR对压力损失和传热都具有相对较大的影响。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2012年第26期|p.7499-7507|共9页
  • 作者

    Xiang-fei Yu; Chun-ping Zhang; Jyh-tong Teng; Su-yi Huang; Shi-ping Jin; Yi-fu Lian; Ching-hung Cheng; Ting-ting Xu; Jiann-Cherng Chu; Yaw-Jen Chang; Thanhtrung Dang; Ralph Greif;

  • 作者单位

    School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China,Department of Mechanical Engineering, Chung Yuan Christian University, Chung-li 32023, Taiwan;

    School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China,Department of Mechanical Engineering, Chung Yuan Christian University, Chung-li 32023, Taiwan;

    Department of Mechanical Engineering, Chung Yuan Christian University, Chung-li 32023, Taiwan;

    School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China;

    School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China;

    Department of Mechanical Engineering, Chung Yuan Christian University, Chung-li 32023, Taiwan;

    Department of Mechanical Engineering, Chung Yuan Christian University, Chung-li 32023, Taiwan;

    School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China,Department of Mechanical Engineering, Chung Yuan Christian University, Chung-li 32023, Taiwan;

    Department of Mechanical Engineering, Chung Yuan Christian University, Chung-li 32023, Taiwan;

    Department of Mechanical Engineering, Chung Yuan Christian University, Chung-li 32023, Taiwan;

    Department of Heat and Refrigeration Technology, Ho Chi Minh City University of Technical Education, Hochiminh, Viet Nam;

    Department of Mechanical Engineering, University of California at Berkeley, CA 94720, USA;

  • 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

    fractal tree-like microchannels; hydraulic and thermal behaviors; numerical and experimental methods;

    机译：分形树状微通道;水力和热行为;数值和实验方法;

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