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Forced convective heat transfer in all metallic wire-woven bulk Kagome sandwich panels

机译：所有金属丝编织散装Kagome夹芯板中的强制对流换热

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摘要

This experimental study reports on forced convective heat transfer in a highly porous cellular material, wire-woven bulk Kagome (WBK), made of aluminum (Al) helix wires forming Kagome-like unit cells that are distributed periodically and sandwiched between two solid Al facesheets. Due to the topological anisotropy of the WBK, two orientations, the most open and closed orientations, were selected for pressure drop and heat transfer measurements. For the range of Reynolds numbers (Re) considered, the pressure drop in the WBK was found to be skin friction dominated at low Re (laminar flow regime; no orientation effect on pressure drop) and form dominated at high Re (transition from laminar to turbulent flow regime; slightly higher pressure drop in the most closed orientation). For heat transfer across the WBK, the Nusselt number in the most closed orientation was consistently higher than that in the most open orientation, attributable mainly to the difference in the open area ratio of the two orientations.
机译：这项实验研究报告了在高度多孔的多孔材料线编织散装Kagome（WBK）中的强制对流换热，WBK由铝（Al）螺旋线制成，形成像Kagome一样的晶胞，这些晶胞定期分布并夹在两个固体Al面板之间。由于WBK的拓扑各向异性，选择了两个方向（最开放和最闭合的方向）进行压降和传热测量。在所考虑的雷诺数（Re）范围内，发现WBK中的压降在低Re（层流状态；对压降无取向影响）的情况下主要由皮肤摩擦引起，而在高Re（从层状转变为层状转变为高压强）时则以皮肤摩擦为主。湍流状态；在最封闭的方向上压力损失略高）。对于整个WBK的传热，最封闭方向的Nusselt数始终高于最开放方向的Nusselt数，这主要归因于两个方向的开口率之差。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2011年第26期|p.5658-5662|共5页
  • 作者

    J.-H. Joo; K.-J. Kang; T. Kim; TJ. Lu;

  • 作者单位

    Automobile Research Center, C/ionnam National University, Gwangju, South Korea;

    School of Mechanical Systems Engineering, Chonnam National University, Gwangju, South Korea;

    School of Mechanical Engineering, University of the Witwatersrand, Johannesburg, South Africa;

    School of Aerospace, Xi'an Jiaotong University, Xi'an, 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

    cellular metal; forced convection; kagome; wbk;

    机译：多孔金属;强制对流;kagome;wbk;

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