嵌入式微通道散热器实验与数值研究  

Experimental and numerical study of embedded microchannel heat sink

作　　者：姜文涛 赵锐 程文龙[1] Jiang Wentao;Zhao Rui;Cheng Wenlong(College of Engineering Science,University of Science and Technology of China,Hefei 230026,China;School of Automotive and Transportation Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]中国科学技术大学工程科学学院,合肥230026 [2]合肥工业大学汽车与交通工程学院,合肥230009

出　　处：《强激光与粒子束》2023年第9期154-164,共11页High Power Laser and Particle Beams

摘　　要：针对高热流密度固体激光器的散热问题,借助微机电系统(MEMS)技术,利用微通道/热源协同设计方法,换热器采用连续S型微通道,并利用歧管形成分层分段流动,研制出了一套微型紧凑的嵌入式歧管S型微通道散热器,并开展了实验研究。使用HFE-7100作为冷却工质,在发热面局部最高温度小于100℃、平均温升小于45℃的情况下,两相时可带走625 W/cm2的热通量,相比传统的歧管矩形微通道散热器提高了12%,但流阻增大了约56%;利用数值模拟方法,通过改变S型的振幅和波长,根据发热面平均温度、换热面平均努塞尔数、压降和综合性能因子来评估S型微通道散热器的结构参数对其散热能力和流动阻力的影响,寻找S型微通道的最优结构设计参数组合。结果表明该散热器的综合性能因子在一个特定的S型形状下存在最佳值。To solve the heat dissipation problem of high heat flux density solid-state laser,a set of micro-compact embedded manifold S-shaped microchannel heat sink was developed using the MEMS technology and themicrochannel/heat source co-design method.The heat exchanger uses continuous S-shaped microchannels and themanifold is used to form tiered and segmented flow.Experiment was conducted,using HFE-7100 as the coolingmedium.Results show that the heat sink can dissipate 625 W/cm2,with a local maximum temperature of less than100℃and an average temperature rise of less than 45℃.Compared with the traditional manifold rectangularmicrochannel heat sink,the heat dissipation performance of S-shaped microchannel increased by 12%,but the flowresistance increased by about 56%.Numerical simulation methods were used to evaluate the structural parameters ofthe S-shaped microchannel heat sink’s heat dissipation ability and flow resistance by changing the amplitude andwavelength of the S shape according to the average temperature of the heating surface,average Nusselt number of theheat transfer surface,pressure drop,and comprehensive performance factor,to find the optimal structure designparameter combination of the S-shaped microchannel.The results show that the comprehensive performance factor ofthe heat sink has an optimal value under a specific S-shaped configuration,which will be used in subsequent studies.

关 键 词：微通道散热 S型微通道 歧管 换热实验 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]