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首页> 外文期刊>International Journal of Heat and Mass Transfer >Field synergy analysis on convective heat transfer and fluid flow of a novel triangular perforated fin
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Field synergy analysis on convective heat transfer and fluid flow of a novel triangular perforated fin

机译：新型三角形多孔翅片对流换热与流场的场协同分析

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摘要

Based on variable cross-section structure, a novel triangular perforated fin was proposed in this paper. 3-D models were established to study convective heat transfer and fluid flow characteristics of the triangular perforated fin for numerical simulation using CFD software. Compared to the related experimental data, the validation of CFD method was verified. The effects of hole opening ratios and hole stagger arrangements on heat transfer and pressure drop characteristics were investigated. Variation in the Colburn factor j and the friction factor/relative to Re were examined. The performance criteria j/f~(1/3) were calculated and superior to the serrated fin under the Reynolds number ranges from 200 to 1960. The inherent mechanism of fluid flow and heat transfer enhancement was explained by the field synergy principle. The average field-synergy angle of B-1/2 was the largest and A-1/4 had the smallest one. The values for A-1/2 were in between. The field synergy principle analysis was consistent with the numerical results. It stated that the secondary flows and vortices can improve the synergy between the velocity and temperature gradient, which is the most fundamental reason why the triangle perforated fin can enhance the heat transfer.
机译：基于变截面结构，本文提出了一种新型的三角穿孔翅片。建立3-D模型以研究三角形多孔翅片的对流传热和流体流动特性，以便使用CFD软件进行数值模拟。通过与相关实验数据的比较，验证了CFD方法的有效性。研究了开孔率和错排排列对传热和压降特性的影响。研究了科尔伯因数j和相对于Re的摩擦因数的变化。计算出的性能标准j / f〜（1/3）在雷诺数为200至1960时优于锯齿状翅片。通过场协同原理解释了流体流动和传热增强的内在机理。 B-1 / 2的平均场协同角最大，A-1 / 4的最小场协同角最小。 A-1 / 2的值介于两者之间。场协同原理分析与数值结果一致。研究表明，二次流动和涡流可以改善速度和温度梯度之间的协同作用，这是三角形穿孔翅片可以增强传热的最根本原因。

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  • 来源
  • 作者

    Juan Li; Xiang Ling; Hao Peng;

  • 作者单位

    Jiangsu Key Laboratory of Process Enhancement and New Energy Equipment Technology, School of Mechanical and Power Engineering, Nanjing University of Technology, No. 30 South Pu Zhu Road, Nanjing 211816, PR China;

    Jiangsu Key Laboratory of Process Enhancement and New Energy Equipment Technology, School of Mechanical and Power Engineering, Nanjing University of Technology, No. 30 South Pu Zhu Road, Nanjing 211816, PR China;

    Jiangsu Key Laboratory of Process Enhancement and New Energy Equipment Technology, School of Mechanical and Power Engineering, Nanjing University of Technology, No. 30 South Pu Zhu Road, Nanjing 211816, PR China;

  • 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

    Field synergy; Triangular perforated fin; Convective heat transfer; Enhancement; Variable cross-section;

    机译：现场协同;三角形穿孔鳍;对流换热;增强;可变截面;

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