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Stretching/shrinking longitudinal fins of rectangular profile and heat transfer

机译:拉伸/收缩矩形轮廓的纵向散热片和传热

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摘要

The present study deals with the heat transfer enhancement and efficiency of longitudinal rectangular fin profiles when a stretching or shrinking mechanism is mounted on the surface of the fin. Exact analytic solutions are sought from which the combined effects of some physical parameters like the convection sink temperature parameter, the Peclet number, the stretching/shrinking parameter and the convection-conduction parameter (Biot number) on the efficiency of longitudinal rectangular fins against non stretched straight rectangular fins can be comparatively analyzed. It is shown that stretching degrades the efficiency, whereas shrinking provides better fin efficiency pointing to significant advantages in terms of fin design purposes. Moreover, the presented neat formulae serve a verification tool for the researchers actively working in the field, particularly when numerical methods are employed to investigate more complex phenomena.
机译:当拉伸或收缩机制安装在翅片表面时,本研究研究纵向矩形翅片轮廓的传热增强和效率。寻求精确的解析解,从中得出一些物理参数(如对流沉温度参数,Peclet数,拉伸/收缩参数和对流传导参数(比奥数))对纵向矩形翅片抵抗非拉伸效率的综合影响可以比较直的矩形散热片。结果表明,拉伸降低了效率,而收缩则提供了更好的散热片效率,这在散热片设计目的方面具有明显的优势。此外,所提出的简洁公式为在该领域积极工作的研究人员提供了一种验证工具,尤其是当采用数值方法研究更复杂的现象时。

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