在对流和辐射作用下,拉伸/收缩对全湿梯形翅片传热性能的影响

IF 2.6 Q2 THERMODYNAMICS
Heat Transfer Pub Date : 2025-04-14 DOI:10.1002/htj.23348
Toremavinahalli Mallikarjunaiha Swetha, Bijjanal Jayanna Gireesha, Puttaswamy Venkatesh
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引用次数: 0

摘要

梯形形状最大限度地提高了表面积,促进了不同部门的有效散热和转移,有助于改善热性能,防止各种设备和系统过热。在此背景下,本文重点研究了在完全湿润的梯形翅片结构中,当翅片表面具有收缩或拉伸机制时,其传热性能和传热特性。用三种不同的机制分析了梯形鳍:拉伸、停滞和收缩机制。此外,翅片性能问题的公式包含对流、辐射和内部热产生的影响。为了研究固流相互作用,达西定律被应用。采用适当的无量纲项对控制方程进行了无量纲化处理,并用RKF方法对控制方程进行了数值求解。分析了梯形翅片内部生热、对流、辐射、湿孔参数、拉伸/收缩参数等重要参数的意义,并对其效率进行了图形化解释。我们观察到,当微粒数(Pe)增加400%时,温度也增加了7.46%。将辐射参数Nr值提高900%,翅尖温度降低27.306%。由此推断,收缩机构大大提高了翅片的冷却效果,特别是当翅片运动时。本文的分析对翅片的设计有一定的指导意义,具有一定的实际应用价值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The Role of Stretching/Shrinking on the Heat Transfer Performance of Fully Wetted Trapezoidal Fin Structures Under the Impact of Convection and Radiation Effects

The trapezoidal shape maximizes surface area, promoting efficient heat dissipation and transfer in diverse sectors, contributing to improved thermal performance and preventing overheating in various devices and systems. In this context, the present work focuses on the thermal performance and features of heat transmission through a fully wetted trapezoidal fin structure, when the fins' surface is equipped with a shrinking or stretching mechanism. The trapezoidal fin has been analyzed using three distinct mechanisms: stretching, stagnation, and shrinking mechanisms. Furthermore, the formulation of the fin performance problem incorporates the effects of convection, radiation, and internal heat generation. To examine the solid–fluid interactions, Darcy's law has been applied. The governing equation has been nondimensionalized by employing appropriate nondimensional terms, and then solved by using Runge-Kutta-Fehlberg (RKF) method numerically. The significance of essential parameters such as internal heat generation, convection, radiation, wet porous parameter, stretching/shrinking parameter, and other relevant parameters and efficiency of trapezoidal fin have been analyzed and graphically interpreted. We observed that as the peclet number ( Pe ) increases by 400%, temperature also increases by 7.46%. By enhancing the value of radiation parameter Nr by 900%, the temperature of the fin tip decreases by 27.306%. It is inferred that the shrinking mechanism greatly enhances the fin's cooling impact, particularly when the fin is moving. The current analysis is helpful for the fin design and pertains to practical applications.

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来源期刊
Heat Transfer
Heat Transfer THERMODYNAMICS-
CiteScore
6.30
自引率
19.40%
发文量
342
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