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A numerical study of flow behavior in the shell and helical finned-tube heat exchanger

机译：壳体和螺旋翅片管热交换器流动的数值研究

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摘要

Extended surfaces mostly aim to improve the heat transfer upon increasing the area of heat transfer. In this paper, the influence of using fins on flow behaviors and the heat transfer of the shell and tube heat exchanger has been investigated. In this regard, the present results are verified with available experimental data in the literature for a helical tube without fins. The effects of fin density (fin per inch), its height, and material have been studied on the heat transfer rate. In addition, the effects of radial pitch and the number of coil loops are studied. The results indicate that implementing extended surfaces significantly increases the heat transfer rate. The increase of fin density from 8 to 12 and the height from 11.5 to 13.5 mm enhances heat transfer up to 48% and 43% depending on Dean number, respectively. The rise of coil pitch augments the overall heat transfer, and it is more efficient at lower Dean numbers. The predicted results also show that the fin material does not have any significant effect on heat transfer.
机译：扩展表面主要是在增加热传递面积时改善传热。本文研究了使用翅片对流动性的影响和壳管热交换器的传热。在这方面，目前的结果用文献中的可用实验数据验证了没有翅片的螺旋管。研究了翅片密度（每英寸），其高度和材料的影响，已经对传热速度进行了研究。此外，研究了径向间距的影响和线圈环的数量。结果表明，实施扩展表面显着提高了传热速率。鳍密度从8到12的增加，11.5至13.5 mm的高度分别增强了高达48％和43％的热量，具体取决于院长数量。线圈间距增加了整体传热，并且在较低的院长数字中更有效。预测结果还表明，鳍材料对热传递没有任何显着影响。

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  • 来源
    《Heat transfer》 |2021年第5期|4607-4621|共15页
  • 作者

    Hamed Dehghani; Mousa Farhadi; A. Ali Rabienataj Darzi; Amin Kardgar;

  • 作者单位

    Faculty of Mechanical Engineering Babol University of Technology Babol Iran;

    Faculty of Mechanical Engineering Babol University of Technology Babol Iran;

    Department of Mechanical Engineering University of Mazandaran Babolsar Iran;

    Department of Mechanical Engineering University of Mazandaran Babolsar Iran;

  • 收录信息 美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    fin; heat transfer; helical tube; spiral heat exchanger;

    机译：鳍;传播热量;螺旋管;螺旋换热器;

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