矩形和圆形槽道脉动热管传热性能的实验研究

Experimental Investigation on Heat Transfer Performance of Pulsating Heat Pipeswith Rectangular and Circular Channels

为了探讨不同截面形状的脉动热管在复杂工况下的传热性能,本文设计了矩形和圆形两种截面形状的脉动热管,采用对比实验的方法探究不同截面形状的脉动热管在水平、竖直工况下,不同功率对其传热性能的影响。实验结果表明:水平工况下矩形脉动热管表面温度和最大温差均低于圆形管;随着功率负荷增加,两种脉动热管表面温度及最大温差均增大,在高功率区,圆形管最大温差明显高于矩形管;竖直工况相比于水平工况,脉动热管表面温度及最大温差均降低。因此,矩形脉动热管相比于圆形脉动热管更适合在电子芯片散热领域中应用。

In order to investigate the heat transfer performance of pulsating heat pipes (PHPs) with different cross-section shapes under complex working conditions, this paper designs two types of PHPs with circular and rectangular cross-sections, using the methods of experiment and comparison to investigate the influence of different power on the heat transfer performance of PHPs with different cross-sections under horizontal and vertical conditions. The experimental results indicated that: the surface temperature and maximum temperature difference of the rectangular PHP are lower than the circular PHP under horizontal working conditions;as the power load increases, the surface temperature and the maximum temperature difference of the two PHPs increase, in high power region, the maximum temperature difference of circular PHP is obviously higher than that of rectangular PHP;the vertical working condition is compared with the horizontal working condition, the surface temperature and maximum temperature difference of which both decrease. Therefore, rectangular PHP is more suitable than circular PHP in the field of electronic chip heat dissipation.