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首页> 外文期刊>Experimental Heat Transfer >LAMINAR NATURAL CONVECTION IN A SQUARE CAVITY WITH A PARTITION ON THE HEATED VERTICAL WALL
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LAMINAR NATURAL CONVECTION IN A SQUARE CAVITY WITH A PARTITION ON THE HEATED VERTICAL WALL

机译：矩形腔中的层流自然对流，并在加热的垂直壁上进行分区

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摘要

The laminar natural convection in an air-filled square cavity with a partition on the heated vertical wall was experimentally investigated. Temperature measurements and flow visualizations were performed for cases with heated and cooled vertical walls (corresponding to a global Grashof number Gr_H of approximately 1.4 × 10~8) and non dimensional top wall temperatures θ_T of 0.57 (insulated) to 2.3. Experiments were performed with an aluminum partition with non dimensional height H_P/H of 0.0625 and 0.125 attached to the heated vertical wall at y/H = 0.65 and 0.95. The blockage effect and/or the thermal effect of the partition resulted in changes to the temperature and flow fields but were mainly limited to the vicinity of the partition. For the cases with the heated top wall, the change in the height of the partition at y/H = 0.95 resulted in changes to the ambient temperature outside the boundary layer due to the reduction of the size of the recirculating flow in the corner region. The changes in the partition height and the top wall temperature affected the blockage effect of the partition, resulting in the local Nusselt number near the corner region to be affected. The local Nusselt number over most of the heated vertical wall of the partitioned cavity (y/H < 0.7) was correlated to the local Rayleigh number in the form Nu = C ? Ra~n.
机译：实验研究了在加热的垂直壁上有隔板的充气方腔内的层流自然对流。对具有加热和冷却垂直壁（对应于全球Grashof数Gr_H约为1.4×10〜8）且无因次顶壁温度θ_T为0.57（绝缘）至2.3的情况进行温度测量和流动可视化。用附着在加热的垂直壁上的y / H = 0.65和0.95的无尺寸高度H_P / H为0.0625和0.125的铝隔板进行实验。隔板的阻塞效应和/或热效应导致温度和流场的变化，但主要限于隔板附近。对于顶壁受热的情况，隔板的高度在y / H = 0.95处的变化会导致边界层外部的环境温度发生变化，这是由于角落区域中循环流尺寸的减小所致。隔断高度和顶壁温度的变化影响了隔断的阻挡效果，导致拐角区域附近的局部努塞尔数受到影响。分隔腔的大部分加热的垂直壁上的局部努塞尔数（y / H <0.7）与局部瑞利数相关，其形式为Nu = C？ Ra〜n

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  • 来源
    《Experimental Heat Transfer》 |2010年第4期|p.298-316|共19页
  • 作者

    W. Wu; C. Y. Ching;

  • 作者单位

    Department of Mechanical Engineering, McMaster University, Hamilton, Ontario, Canada;

    rnDepartment of Mechanical Engineering, McMaster University, Hamilton, Ontario, Canada, L8S 4L7;

  • 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

    laminar natural convection; air flow; square cavity; partition;

    机译：层流自然对流空气流动;方腔划分;

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