双层针翅歧管微通道热沉歧管层优化研究  

Optimization Study on Manifold Layer of a Double Layer Pin-Fin Manifolc Microchannel Heat Sink

作　　者：李延涛 曹畅 汪千翔 崔大安 纪玉龙[1] LI Yantao;CAO Chang;WANG Qianxiang;CUI Daan;JI Yulong(Dalian Maritime University College of Marine Engineering,Dalian 116026,China)

机构地区：[1]大连海事大学轮机工程学院,大连116026

出　　处：《工程热物理学报》2024年第12期3829-3836,共8页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.52006023,No.52376046);教育部创新团队项目(No.8091B042204);中央高校基本科研业务费专项资金资助(No.3132023527,No.3132023223)。

摘　　要：歧管式微通道热沉结构紧凑,换热效率高,有望成为大功率电子元件热管理的有效手段。为了进一步提高双层针翅歧管微通道热沉的换热能力以及温度均匀性,本文对双层针翅歧管式微通道热沉的歧管层进行了结构设计,并以去离子水为工质对热沉的流动与传热特性进行了数值模拟研究。结果表明,通过改变歧管层进出口布置使得上下微通道层的工质流向异向时,可降低热阻的同时降低了热沉表面温差。同横排进口相比,竖排进口可以降低热阻并提高热沉的综合换热性能。进出口直径比为1时热沉表面温差最大,进出口直径比小于1时热阻降低,而进出口直径比大于1时换热能力与等于1时相差不大。The manifold microchannel heat sink has a compact structure and high heat transfer efficiency,which is expected to become an effective means of thermal management for high-power electronic components.In order to further improve the heat transfer capacity and temperature uniformity of the double-layer Pin-Fin manifold microchannel heat sink,this paper designs the manifold layer of the double-layer Pin-Fin manifold microchannel heat sink and conducts numerical simulation research on the flow and heat transfer characteristics of the heat sink using deionized water as the working fuid.The results show that by changing the arrangement of the inlet and outlet of the manifold layer to make the working fuid fow in opposite directions in the upper and lower microchannel layers,the thermal resistance and the surface temperature difference of the heat sink can both be reduced.Compared with horizontal inlet,vertical inlet can reduce thermal resistance and improve the comprehensive heat transfer performance of heat sink.When the inlet and outlet diameter ratio is 1,the surface temperature difference of the heat sink is maximum.When the inlet and outlet diameter ratio is less than 1,the thermal resistance decreases.However,when the inlet and outlet diameter ratio is greater than 1,the heat transfer capacity is not significantly different from that when it is equal to 1.

关 键 词：歧管式微通道 双层微通道 针翅 强化换热 

分 类 号：TK124[动力工程及工程热物理—工程热物理]