多脉动冷端热管散热器的散热性能-中南大学学报.pdf

第 48 卷第 2 期 中南大学学报( 自然科学版) Vol.48 No.2 2017 年 2 月 Journal of Central South University (Science and Technology) Feb. 2017 DOI: 10.11817/j.issn.1672−7207.2017.02.034 多脉动冷端热管散热器的散热性能 夏侯国伟，刘业鹏，王当，刘鹤华 (长沙理工大学 能源与动力工程学院，湖南 长沙，410076) 摘要：为了强化单片板式脉动热管的传热，满足高功率电子芯片散热的需要，提出一种具有多脉动冷端结构的热 管散热器，并对其散热与启动性能进行实验研究。分析充液率、加热功率对多脉动冷端热管散热器传热性能及启 动性能的影响，并与单片平板脉动热管进行对比。研究结果表明: 多脉动冷端热管散热器的最佳充液率为 25% ； 多脉动冷端散热器冷端启动呈先中间后两侧的顺序；启动时间受充液率影响较小，但随加热功率增加而变短且启 动稳定性更好；启动温度则随充液率的增加而变大；在相同工况下，多脉动冷端散热器传热及启动性能明显比单 片平板脉动热管的优。 关键词：电子芯片；热管；传热性能；启动性能 中图分类号：TK121 文献标志码：A 文章编号：1672−7207(2017)02−0533−07 Thermal performance of multiple pulsating cold end heat pipe radiator XIAHOU Guowei, LIU Yepeng, WANG Dang, LIU Hehua (School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha 410076, China) Abstract: In order to enhance the heat transfer in single plate pulsating heat pipe, and meet the needs of high power electronic chip cooling, the cold end heat pipe radiator that has more fluctuating structure was proposed, and the heat dissipation and startup performance were experimentally researched. The influence of charging rate and radiator heating power with pulse cold end heat pipe on the heat transfer performance and startup performance was analyzed, and the pulse cold end heat pipe was compared with single plate pulsating heat pipe. The results show that the best charging rate of pulse cold end heat pipe radiator is 25%.Multiple pulsating cold end on either side of the radiator after cold end i