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首页> 外文期刊>Heat Transfer Engineering >Numerical Investigation of the Inlet Baffle, Header Geometry, and Triangular Fins Effects on Plate-Fin Heat Exchangers Performance
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Numerical Investigation of the Inlet Baffle, Header Geometry, and Triangular Fins Effects on Plate-Fin Heat Exchangers Performance

机译：入口挡板，集管几何形状和三角形翅片对板翅式换热器性能影响的数值研究

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摘要

In this study, the optimal location of baffle in the header of air-to-air plate heat exchangers and the geometry of the header and the effects of triangular fins arrays on the effectiveness were numerically investigated for different flow rates and Reynolds numbers on different models. The main purpose of inlet baffle and geometry changes is to improve the pattern of flow distribution and assist flow uniformity. The investigations show that the optimal location of the inlet baffle with high Reynolds numbers has an insignificant effect on effectiveness, while with Reynolds numbers 250-3000, the effectiveness is affected significantly by baffle location. On the other hand, the reduction in flow gradients by changes in geometry can improve flow distribution. Moreover, investigations show that the increase in fin density (fins/mm) up to a specific value can enhance the effectiveness. In the present study, the Colburn j-factor behavior versus different Reynolds numbers, velocity distributions, pressure drops, and velocity vectors is examined.
机译：在这项研究中，对不同型号的不同流量和雷诺数下的空气-空气板式换热器的挡板的最佳位置，挡板的几何形状以及三角形翅片阵列对效率的影响进行了数值研究。 。进风口挡板和几何形状变化的主要目的是改善流量分布方式并帮助流量均匀性。研究表明，具有高雷诺数的进口挡板的最佳位置对有效性影响不显着，而对于雷诺数为250-3000的挡板，有效性受到挡板位置的显着影响。另一方面，通过改变几何形状来减小流量梯度可以改善流量分配。此外，研究表明，将翅片密度（fins / mm）增加到特定值可以提高有效性。在本研究中，检查了Colburn j因子行为与不同雷诺数，速度分布，压降和速度向量的关系。

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  • 来源
    《Heat Transfer Engineering》 |2015年第18期|1397-1408|共12页
  • 作者

    SINA SALEHI; HOSSEIN AFSHIN; BIJAN FARHANIEH;

  • 作者单位

    Center of Excellence in Energy, School of Mechanical Engineering, Sharif University of Technology, Tehran, Iran;

    Center of Excellence in Energy, School of Mechanical Engineering, Sharif University of Technology, Tehran, Iran,School of Mechanical Engineering, Sharif University of Technology, PO Box 11155-9567, Azadi Ave., Tehran, Iran;

    Center of Excellence in Energy, School of Mechanical Engineering, Sharif University of Technology, Tehran, Iran;

  • 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);
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  • 正文语种 eng
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