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 is among the first order. Start time affected by charging rate is small, but it is shortened with the increase of heating power and the started stability is stronger. The started temperature increases with the increment of the charging rate. At the same conditions, the heat transfer properties with more pulses cold end radiator and the startup performance are superior to those of the single piece of plate pulsating heat pipe.%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.
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