常温闭环脉动热管性能影响因素研究综述  

Review on Key Factors in Closed-loop Pulsating Heat Pipes within Atmospheric Temperature

作　　者：张宇航 吴思远 孙瑜 赵日晶 黄东[1] Zhang Yuhang;Wu Siyuan;Sun Yu;Zhao Rijing;Huang Dong(School of Energy and Power Engineering,Xi′an Jiaotong University,Xi′an,710049,China)

机构地区：[1]西安交通大学能源与动力工程学院,西安710049

出　　处：《制冷学报》2024年第5期47-62,共16页Journal of Refrigeration

摘　　要：常温闭环脉动热管依靠工质在管内脉动和相变传热,具有传热效率高、结构简单、成本低等优点,广泛应用于电子元件散热。将影响脉动热管启动和传热性能的因素分为3类展开综述:结构参数、操作参数和工质物性参数。首先对结构参数中管径、截面形状、弯头数以及各段长度比等因素的研究进行总结,其次分析操作参数中加热功率、倾斜角度和充液率的影响,最后将工质物性参数分为影响流动和传热两方面进行归纳。为提升脉动热管启动和传热性能,未来需对临界弯头数开展深入研究;为适应小倾角和负角度工况,需要提升热管抗重力性能;为描述工质物性对热管性能的影响,需构建物性参数综合评价指标。A closed-loop pulsating heat pipe within atmospheric temperature relies on the pulsation and phase change of the internal working fluid.It has been widely used for the heat dissipation of electronic components owing to its high heat transfer efficiency,simple structure,and low cost.In this study,the factors affecting the startup and heat transfer performance of pulsating heat pipes are divided into three categories,namely,structural parameters,operating conditions,and working fluid properties.First,the structural parameters,including factors such as diameter,cross-sectional shape,number of U-bends,and length ratio of each section,are summarized.Second,the influence of operating conditions,including the heating power,inclination angle,and liquid filling rate,is analyzed.Finally,the physical parameters of the working fluid are divided into flow and heat transfer properties.To improve the start-up and heat transfer performance of pulsating heat pipes,future research should focus on conducting in-depth investigations into the critical number of U-bends.The anti-gravity performance of heat pipes must be improved for adapting to small inclination angles and negative angle conditions.A comprehensive evaluation criterion describing the influence of physical parameters on performance should also be established.

关 键 词：闭环脉动热管 结构参数 操作参数 工质物性参数 

分 类 号：TK172.4[动力工程及工程热物理—热能工程] TK124