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首页> 外文期刊>Heat Transfer Engineering >Thermal Behavior in Rectangular Channel Duct Fitted With V-Shaped Perforated Baffles
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Thermal Behavior in Rectangular Channel Duct Fitted With V-Shaped Perforated Baffles

机译：装有V形穿孔挡板的矩形通道管道中的热行为

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摘要

An experimental investigation has been carried out to study the heat transfer and friction factor characteristics of a V-down-perforated baffled roughened solar air heater duct. The roughened wall was uniformly heated and the rest three walls of the duct were kept insulated. Measurements have been carried out for the duct aspect ratio of 10, Reynolds number range of 3800-19,000, relative hole position range of 0.429-0.571, relative roughness pitch range of 2-4, and open area ratio range of 12-44%. The relative roughness height of 0.4 and angle of attack of 60° are kept constant during the entire experimentation. The heat transfer and friction factor data obtained were compared with the data obtained from a smooth duct under similar operating conditions. In comparison to the smooth duct the V-shaped perforated baffle roughened duct enhanced the Nusselt number and friction factor by 2.57 and 5.96 times, respectively. The thermohydraulic performance parameter is found superior for the open area ratio of 24% and relative roughness pitch of 2.5.
机译：已经进行了实验研究，以研究V型向下穿孔的带挡板的粗糙太阳能空气加热器管道的传热和摩擦系数特性。粗糙的壁被均匀地加热，并且导管的其余三个壁保持绝缘。已经进行了以下测试：风道纵横比为10，雷诺数范围为3800-19,000，相对孔位置范围为0.429-0.571，相对粗糙度节距范围为2-4，开孔率范围为12-44％。在整个实验过程中，相对粗糙度高度0.4和迎角60°保持恒定。将获得的传热和摩擦系数数据与在类似操作条件下从光滑管道获得的数据进行比较。与光滑的风道相比，V形的多孔挡板粗糙型风道的Nusselt数和摩擦系数分别提高了2.57倍和5.96倍。发现热液压性能参数对于24％的开口面积比和2.5的相对粗糙度节距是优越的。

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  • 来源
    《Heat Transfer Engineering》 |2015年第8期|471-479|共9页
  • 作者

    SUNIL CHAMOLI; NARENDER SINGH THAKUR;

  • 作者单位

    Department of Mechanical Engineering, DIT University, Dehradun 248009, India;

    Centre for Energy and Environment, National Institute of Technology, Hamirpur, India;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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