不同肋片结构的印刷电路板换热器传热与阻力特性
发布时间：2019-01-08 13:38
【摘要】：随着电子系统日益发展,高热流密度电子器件的冷却问题备受关注,微细通道液冷是一种广泛使用的高效冷却方式.印刷电路板换热器具有传热系数高、紧凑、高效等特点,有望成为微细通道热沉的备选方案.为此,本文对几种不同肋结构印刷电路板换热器的散热性能进行了评估,结果表明,非连续肋结构性能显著优于连续平直肋结构;改进翼型肋综合传热性能最佳,其次依次是翼型肋、椭圆肋、圆形肋和连续平直肋,改进翼型肋在高雷诺数条件下优势更加显著;相对于平直肋,改进翼型肋印刷电路板换热器Nu数提高了20.2%,阻力上升了5.6%.
[Abstract]:With the development of electronic system, the cooling of high heat flux electronic devices has been paid more and more attention. Microchannel liquid cooling is a widely used high efficiency cooling method. Printed circuit board heat exchanger has the characteristics of high heat transfer coefficient, compact and high efficiency, so it is expected to be an alternative scheme for micro channel heat sink. In this paper, the heat dissipation performance of several kinds of heat exchangers with different rib structures on printed circuit boards is evaluated. The results show that the performance of discontinuous rib structures is significantly better than that of continuous straight ribbed structures. The comprehensive heat transfer performance of the improved wing rib is the best, followed by the wing rib, the elliptical rib, the circular rib and the continuous straight rib, and the advantage of the improved wing rib is more obvious under the condition of high Reynolds number. Compared with the flat rib, the Nu number of the improved fin printed circuit board heat exchanger is increased by 20.2and the resistance is increased by 5.6.
【作者单位】： 西安交通大学热流科学与工程教育部重点实验室;
【基金】：国家自然科学基金(51120165002,51276139)资助
【分类号】：TK172;TN41
本文编号：2404672
[Abstract]:With the development of electronic system, the cooling of high heat flux electronic devices has been paid more and more attention. Microchannel liquid cooling is a widely used high efficiency cooling method. Printed circuit board heat exchanger has the characteristics of high heat transfer coefficient, compact and high efficiency, so it is expected to be an alternative scheme for micro channel heat sink. In this paper, the heat dissipation performance of several kinds of heat exchangers with different rib structures on printed circuit boards is evaluated. The results show that the performance of discontinuous rib structures is significantly better than that of continuous straight ribbed structures. The comprehensive heat transfer performance of the improved wing rib is the best, followed by the wing rib, the elliptical rib, the circular rib and the continuous straight rib, and the advantage of the improved wing rib is more obvious under the condition of high Reynolds number. Compared with the flat rib, the Nu number of the improved fin printed circuit board heat exchanger is increased by 20.2and the resistance is increased by 5.6.
【作者单位】： 西安交通大学热流科学与工程教育部重点实验室;
【基金】：国家自然科学基金(51120165002,51276139)资助
【分类号】：TK172;TN41
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1 李磊;杨剑;马挺;徐向阳;曾敏;王秋旺;;印刷电路板通道的高温传热和阻力特性研究[J];工程热物理学报;2014年05期
，本文编号：2404672
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