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Thermo-Hydraulic Performance Evaluation, Field Synergy, and Entransy Dissipation Analysis for Hexagon-Like and Circular-Like Pin Finned Tube Bundles

机译：六角形和圆形销钉翅片管束的热工水力性能评估，场协同和穿透耗散分析

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摘要

In this paper, a comprehensive thermo-hydraulic performance evaluation for air flow across the hexagon-like and circular-like staggered pin finned tube bundle heat transfer surfaces has been numerically carried out by adopting the performance evaluation plot of enhanced heat transfer techniques oriented for energy-saving. In addition, the simulation results have also been analyzed from the viewpoints of field synergy principle and entransy dissipation extreme principle. The results indicate that the heat transfers are all enhanced based on identical pressure drop for the hexagon-like and circular-like pin finned tube bundles within the inlet velocity range from 1m/s to 10m/s studied. Moreover, the circular-like pin finned tube bundle offers the lowest friction factor increase ratio for the same Nusselt number increase ratio. Furthermore, the synergy between velocity and fluid temperature gradient has been proved again, having inherent consistency with the dissipation of entransy.
机译：本文通过采用面向能量的增强传热技术的性能评估图，对空气在六边形和圆形交错销钉翅片管束传热面上的流动进行了全面的热工性能评估。 -保存。此外，还从场协同原理和瞬态耗散极限原理的角度分析了仿真结果。结果表明，在入口速度从1m / s到10m / s的范围内，六角形和圆形的针状翅片管束的压降相同时，传热都得到了增强。而且，在相同的努塞尔特数增加率的情况下，圆形的针状翅片管束具有最低的摩擦系数增加率。此外，再次证明了速度与流体温度梯度之间的协同作用，与内耗散散具有内在的一致性。

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  • 来源
    《Heat Transfer Engineering》 |2018年第16期|1166-1178|共13页
  • 作者

    Tian En; He Ya-Ling; Tao Wen-Quan;

  • 作者单位

    Xi An Jiao Tong Univ Sch Energy & Power Engn Minist Educ Key Lab Thermofluid Sci & Engn 28 Xianning West Rd Xian 710049 Shaanxi Peoples R China;

  • 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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