射流微通道耦合高效散热器传热实验研究  

Experimental research on heat transfer characteristics of micro-channel/jet impingement heat sink

作　　者：潘瑶 刘欣 巩萌萌 PAN Yao;LIU Xin;GONG Mengmeng(Beijing Institute of Astronautics System Engineering,Beijing 100076,China)

机构地区：[1]北京宇航系统工程研究所,北京100076

出　　处：《太赫兹科学与电子信息学报》2023年第11期1397-1402,共6页Journal of Terahertz Science and Electronic Information Technology

摘　　要：针对光导开关高重复频率运行时产生丝电流加热,使光导开关温度迅速超过材料最高允许使用温度,造成开关失效或损伤的难题,本文结合微通道散热技术和射流冷却技术的优点,设计了射流微通道耦合高效散热器。通过实验测试,对不同运行工况下射流微通道耦合高效散热器的传热特性进行了研究,并与美国进口的蜂窝型微通道散热器进行散热性能对比。实验结果表明:体积流量为3 L/min的情况下,射流微通道耦合高效散热器的换热系数超过35000 W/(K·m^(2)),散热量高达1000 W,相比蜂窝型微通道散热器散热量提升了45%。在测试流量下,随着体积流量的增加,射流微通道耦合高效散热器的平均换热系数接近线性增加,而蜂窝型微通道散热器的平均换热系数在大流量下却增加缓慢。此外,采用射流微通道耦合高效散热器冷却的热源面温度均匀性明显优于采用蜂窝型微通道散热器冷却的热源面温度均匀性,采用射流微通道耦合高效散热器的热源面温度波动能降低58%,更有利于降低光导开关热应力。During the period that the Photoconductive Semiconductor Switches(PCSS)is operating at a high repetition frequency,it generates filament current heating,then the temperature of the PCSS quickly exceeds the maximum operating temperature,causing the PCSS to fail or damage.Combining the advantages of microchannel heat sink and jet cooling technology,a high-efficiency micro-channel/jet impingement heat sink is designed.Through experimental tests,the heat transfer characteristics of the micro-channel/jet impingement heat sink under different operating conditions are studied,and the heat dissipation performance is compared with that of the honeycomb micro-channel heat sink imported from the United States.The experimental results show that when the volume flow rate is 3 L/min,the heat transfer coefficient of the micro-channel/jet impingement heat sink exceeds 35000 W/(K·m^(2)),and the heat dissipation is as high as 1000 W,which is higher than that of the honeycomb microchannel heat sink by 45%.Under the test flow rate,with the increase of the volume flow rate,the average heat transfer coefficient of the micro-channel/jet impingement heat sink approaches a linear increase.The average heat transfer coefficient of the honeycomb micro-channel radiator increases slowly at large flow rates.In addition,compared with the method that cooled by the honeycomb microchannel heat sink,the uniformity of the heat source temperature cooled by the micro-channel/jet impingement heat sink is significantly better,and it can reduce the temperature fluctuation of the heat source surface by 58%,which is more conducive to reduce the thermal stress of the PCSS.

关 键 词：射流阵列 微通道 实验研究 光导开关 

分 类 号：TN015[电子电信—物理电子学]