不同散热翅片结构下的芯片散热性能分析  

Analysis of chip thermal performance under different cooling fin structures

作　　者：李方 刘平 唐瑞琪 赵明超 周友行[1] LI Fang;LIU Ping;TANG Ruiqi;ZHAO Mingchao;ZHOU Youhang(School of Mechanical Engineering and Mechanics,Xiangtan University,Xiangtan 411105,China;YIPLI Xianghong(Hunan)Machinery and Chemical Co.,Ltd.,Yueyang 414100,China)

机构地区：[1]湘潭大学机械工程与力学学院,湖南湘潭411105 [2]易普力向红(湖南)机械化工有限责任公司,湖南岳阳414100

出　　处：《湘潭大学学报（自然科学版）》2024年第5期48-58,共11页Journal of Xiangtan University(Natural Science Edition)

基　　金：国家自然科学基金(52175254);湖南省研究生科研创新项目(CX20220603,CX20230550)。

摘　　要：为了缓解芯片热点散热问题,基于一种结合微通道和针翅形散热片的混合散热器,提出了3种具有不同截面形状翅片的微通道散热器,运用计算流体力学方法展开相关研究,分析了3种微通道散热器的背景区域和热点区域的温度场以及流场分布特性,选取散热器峰值温度、温差、压降和等效热阻作为性能参数,评估3种散热器的散热性能.结果表明,在4种冷却液入口流速(0.2 m·s^(-1)、0.4 m·s^(-1)、0.6 m·s^(-1)、0.8 m·s^(-1))下,圆柱形翅片的微通道散热器均呈现出最低的峰值温度、最小的温差和最低的等效热阻,以入口冷却液流速为0.2 m·s^(-1)为例,圆柱形、四棱柱形、三棱柱形翅片的微通道散热器热源面的最高温度分别为358 K、360 K、364 K,温差分别为21.3 K、22.1 K、23.7 K,说明圆柱形翅片具有最佳综合传热性能.In order to alleviate the problem of heat dissipation in hot spots,based on a hybrid heat sink combining microchannel and pin-fin heat sink,three kinds of micro channel heat sinks with different cross-sectional shapes and fins were proposed,and the computational fluid dynamics method was used to carry out related research,the temperature field and flow field distribution characteristics of the background and hot spot areas of the three micro channel heat sinks were analyzed,and the peak temperature,temperature difference,voltage drop and equivalent thermal resistance of the heat sink were selected as performance parameters to evaluate the heat dissipation performance of the three heat sinks.The results show that under the four coolant inlet flow velocities(0.2 m·s^(-1),0.4 m·s^(-1),0.6 m·s^(-1),0.8 m·s^(-1)),the microchannel radiators with cylindrical fins show the lowest peak temperature,the smallest temperature difference and the lowest equivalent thermal resistance.Taking the inlet coolant flow rate as an example,the maximum temperature of the heat source surface of the microchannel radiators with cylindrical,quadrangular prism and triangular prism fins is 358 K,360 K and 364 K,and the temperature difference is 21.3 K,22.1 K,23.7 K,respectively.The results show that the cylindrical fin has the best comprehensive heat transfer performance.

关 键 词：微通道散热器 翅片结构 微电子芯片 计算流体力学 

分 类 号：TK124[动力工程及工程热物理—工程热物理]