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Enhancing heat transfer in the core flow by using porous medium insert in a tube

机译：通过在管中使用多孔介质插件来增强岩心流中的热传递

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摘要

According to the concept of heat transfer enhancement in the core flow, porous media with a slightly smaller diameter to a tube are developed and inserted in the core of the tube under the constant and uniform heat flux condition. The flow resistance and heat transfer characteristics of the air flow for laminar to fully turbulent ranges of Reynolds numbers are investigated experimentally and numerically. There are three different porous media used in the experiments with porosity of 0.951, 0.966 and 0.975, respectively. The effect of porous radius ratio on the heat transfer performance is studied in numerical simulation. Both numerical and experimental results show that the convective heat transfer is considerably enhanced by the porous inserts of an approximate diameter with the tube and the corresponding flow resistance increases in a reasonable extent especially in laminar flow. It shows that the core flow enhancement is an efficacious method for enhancing heat transfer.
机译：根据芯流中传热增强的概念，在恒定且均匀的热通量条件下，开发出直径略小于管的多孔介质，并将其插入管的芯中。对层流至雷诺数的完全湍流范围内的气流的流动阻力和传热特性进行了实验和数值研究。实验中使用了三种不同的多孔介质，其孔隙率分别为0.951、0.966和0.975。在数值模拟中研究了多孔半径比对传热性能的影响。数值和实验结果均表明，与管近似直径的多孔插件大大提高了对流换热，并且相应的流阻在合理范围内增加，特别是在层流中。结果表明，增强芯流是提高传热的有效方法。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2010年第6期|1164-1174|共11页
  • 作者

    Z.F. Huang; A. Nakayama; K. Yang; C. Yang; W. Liu;

  • 作者单位

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

    Department of Mechanical Engineering, Shizuoka University, 3-5-J Johoku, Hamamatsu 432-8561, Japan;

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

    School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China Department of Mechanical Engineering, Shizuoka University, 3-5-J Johoku, Hamamatsu 432-8561, Japan;

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

    heat transfer enhancement; porous media; core flow; tube;

    机译：传热增强;多孔介质核心流管;

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