摘要
针对一种工字型热沉结构,对比分析了传统微小流道和分形微小流道的传热与流动特性。结果表明,分形流道相对于传统流道表现出更好的温度性能和流动特性;分形流道的底面最高温度和最高温差分别降低了7.8℃和7.9℃,流阻降低了91.7%。质量流量对各PCB板最高温度和最高温差影响显著,敏感性超过90%,流道直径对压降影响达到89%,选取合理的参数配合区间有利于提升热沉的温控性能并降低系统的泵功耗。与传统微小流道和分形微小流道相比,优化后方案的总热阻分别降低了11.4%和6.7%,平均传热系数分别增加了66.3%和36.4%。
The heat transfer and flow characteristics of traditional micro-channel and fractal micro-channel were compared and analyzed for an I-shaped heat sink structure.The results show that fractal flow channel exhibites better temperature performance and flow characteristics than traditional flow channel.The maximum temperature of bottom surface and maximum difference temperature of fractal flow channel are reduced by 7.8 ℃ and 7.9 ℃ respectively,besides,the flow resistance was reduced by 91.7%.The mass flow had an important impact on the maximum temperature and maximum temperature difference of each PCB board,the sensitivity is more than 90%,what's more,the flow channel diameter has a significant impact on pressure drop,the sensitivity is up to 89%.The selection of reasonable parameter matching interval is beneficial to improve the temperature control performance of heat sink and reduce the pump power consumption of the system.Compared with traditional micro-flow channel and fractal micro-flow channel,the total thermal resistance and of optimized scheme is reduced by 11.4% and 6.7% respectively,and the average heat transfer coefficient is increased by 66.3% and 36.4% respectively.
作者
刘松
钱自富
李鹏
陈俊
冯帅
邓俊
Liu Song;Qian Zifu;Li Peng;Chen Jun;Feng Shuai;Deng Jun(Sichuan Jiuzhou Electric Group Co.,Ltd,Mianyang 621000,China;Sichuan Avionics System Product Lightweight Design and Manufacturing Engineering Laboratory,Mianyang 621000,China;School of Vehicle Engineering,Chongqing University of Technology,Chongqing 400050,China;Sichuan Provinical Special Antenna Material and Advanced Forming Engineering Technology Research Center,Mianyang 621000,China)
出处
《低温与超导》
CAS
北大核心
2024年第6期65-72,共8页
Cryogenics and Superconductivity
基金
重庆市教育委员会科学技术研究计划项目(KJQN202101120)
四川省科技计划项目(2023YFG0365)资助。
关键词
电子器件
热管理
工字型热沉
分形流道
多目标优化
传热强化
Electrics
Thermal management
I-shaped radiator
Fractal mini-channels
Multi-objective optimization
Heat transfer enhancement
作者简介
刘松(1987-),男,硕士/高级工程师,研究方向为功率器件热管理、结构设计、电磁兼容;通信作者:李鹏(1990-),男,硕士/工程师,研究方向为电子设备热设计、结构设计,1726560718@qq.com。
