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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%.
With the development of electronic systems, the cooling of high heat flux density electronic devices has drawn much attention. Micro-channel liquid cooling is a widely used and efficient cooling method. Printed circuit board heat exchangers have the characteristics of high heat transfer coefficient, compactness and high efficiency , Which is expected to be an alternative solution for the microchannel heat sink.Therefore, this paper evaluates the heat dissipation performance of several ribbed PCB heat exchangers. The results show that the non-continuous rib structure performance is significantly better than the continuous flat rib Structure. The heat transfer performance of the improved airfoil rib is the best, followed by the airfoil rib, elliptical rib, circular rib and continuous straight rib, and the improved airfoil rib has more significant advantages under high Reynolds number; Ribs, improved airfoil PCB Nu number increased by 20.2%, resistance increased by 5.6%.