优化的交错翅片在加热平面上的射流冷却增强

IF 2.6 3区工程技术 Q2 ENGINEERING, MECHANICAL

International Journal of Heat and Fluid Flow Pub Date : 2025-02-21 DOI:10.1016/j.ijheatfluidflow.2025.109780

Medhat M. Sorour, Wael M. El-Maghlany, Ahmed El-Shafei, Mohamed A. Alnakeeb

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引用次数: 0

摘要

本文研究了交错翅片结构对单射流在受热平板上的流动和换热特性的影响。利用v2f模型进行了一项数值研究，该研究涵盖了广泛的射流雷诺数（8000 - 40000）和射流长径比（z/d = 0.5-8）。通过系统地改变翅片尺寸：排数(n)、高度、厚度、间距和间距，确定了最大化传热的最佳交错翅片设计。然后将优化后的交错翅片配置与平板和直线翅片配置进行比较，以评估其效果。此外，还制作了一个实验装置来验证交错翅片在加热平板冷却中的优先性。结果表明：优化后的五排交错翅片结构，高度比（h/R）为0.2，厚度比（t/R）为0.053，间距比（S/R）为0.048，节距比（p/R）为0.30，具有较好的散热效果。当射流雷诺数为8000时，平均努塞尔数比平板增加了13.87%，比直线型翅片增加了9.67%。这种优势在30,000雷诺数时更加明显，分别比平板和直线翅片结构提高了27.36%和13.64%。

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Jet cooling enhancement on a heated flat surface with optimized staggered fins

This paper investigates the influence of staggered fins configuration on the flow and heat transfer characteristics of a single impinging jet on a heated flat plate. A numerical study, utilizing the v²f model, was conducted across a broad range of jet Reynolds numbers (8000–40,000) and jet aspect ratios (z/d = 0.5–8). The optimal staggered fins design for maximizing heat transfer was identified through systematic variation of fin dimensions: number of rows (n), height, thickness, spacing, and pitch. The performance of the optimized staggered fins configuration was then compared to both flat plate and straight in-line fins arrangements to assess its efficacy. Additionally, an experimental facility was fabricated to validate the priority of using staggered fins in cooling the heated flat plates. The results revealed that the optimized staggered fins configuration, featuring five rows, height ratio (h/R) of 0.2, and thickness ratio (t/R) of 0.053, spacing ratio (S/R) of 0.048 and pitch ratio (p/R) of 0.30, allows better heat dissipation compared to the other arrangements. At a jet Reynolds number of 8000, a 13.87 % increase in average Nusselt number was observed compared to the flat plate, and a 9.67 % increase over straight in-line fins. This advantage becomes even more pronounced at a Reynolds number of 30,000, with enhancements of 27.36 % and 13.64 % over flat plate and straight in-line fins configurations, respectively.

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来源期刊

International Journal of Heat and Fluid Flow 工程技术-工程：机械

CiteScore

5.00

自引率

7.70%

发文量

131

审稿时长

33 days

期刊介绍： The International Journal of Heat and Fluid Flow welcomes high-quality original contributions on experimental, computational, and physical aspects of convective heat transfer and fluid dynamics relevant to engineering or the environment, including multiphase and microscale flows. Papers reporting the application of these disciplines to design and development, with emphasis on new technological fields, are also welcomed. Some of these new fields include microscale electronic and mechanical systems; medical and biological systems; and thermal and flow control in both the internal and external environment.