沟槽式半球形销鳍对散热器冷却性能的影响

A. Yousfi, Lahcene Bellahcene, Faris Alqurashi, Djamel Sahel, Mohamed Teggar, Abdelghani Laouer, Müslüm Arıcı, M. Kchaou
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引用次数: 0

摘要

针翅片具有改善各种工程设备热性能的潜力。经过改良的针翅散热片能以更低的成本进一步提高其被动散热性能。本研究旨在对沟槽式半球形针翅散热器(THPFHS)的热性能以及沟槽数(N = 1、3 和 5)和厚度(e = 1 至 5 毫米)等参数的影响进行数值研究。模拟使用计算流体动力学(CFD)软件进行,考虑了湍流气流条件。结果表明,使用在半球形针形鳍片中间装有一条沟槽的铝鳍片,可大大提高局部传热效果。此外,与传统的圆柱形针翅散热器(CPFHS)相比,所有研究的配置都显示出较高的热性能系数(HTPF)。对于这种新配置(THPFHS),与基线情况相比,Nu 增加了 45%,而热阻降低了 42%。另一方面,性能的提高导致压降减少 50%。此外,所获得的结果表明,主要在高 Re 条件下,性能得到了显著改善。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of Trenched Hemispherical Pin Fins on Cooling Performance of Heat Sink
Pin fins have the potential to improve the thermal performance of various engineering devices. Modified pin fins could further increase their thermal performance in a passive way at lower cost. This study is aimed at numerically investigating the thermal performance of trenched hemispherical pin fins heat sink (THPFHS) and the influence of parameters including the trench number (N = 1, 3 and 5) and thickness (e = 1 to 5 mm). The simulations were performed using a computational fluid dynamics (CFD) software considering turbulent air flow conditions. Results showed that the use of aluminum fins fitted with one trench in the middle of the hemispherical pin fin considerably increased the local heat transfer. Furthermore, all studied configurations show high thermal performance factor (HTPF) compared with the conventional cylindrical pin fins heat sink (CPFHS). For this new configuration (THPFHS), Nu increases by 45% while the thermal resistance reduces by 42%, compared to the baseline case. On the other hand, this improved performance results in 50% pressure drop penalty. Moreover, the obtained results showed a significant improvement in the performance mainly at high Re.
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