带射流斜肋微通道的强化散热研究  

Study on Heat Dissipation Intensification of Microchannel with Impinging Jets and Inclined Ribs

作　　者：岳小棚 田丽亭[1] 张宇 崔志强 YUE Xiao-peng;TIAN Li-ting;ZHANG Yu;GUI Zhi-qiang(School of Energy and Environmental Engineering,Hebei University of Technology,Tianjin,China,Post Code:300401)

机构地区：[1]河北工业大学能源与环境工程学院,天津300401

出　　处：《热能动力工程》2020年第1期164-170,共7页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金(51576059);沧州高新区博士后工作经费资助项目。

摘　　要：在高热流密度(300 W/cm^2)条件下,对射流斜肋微通道的流动换热特性进行了数值研究,并与直通道、斜肋直通道和射流微通道进行了对比。结果表明:斜肋后方尾涡受射流抑制减小,受上游流体冲刷裹挟,下游射流发生明显漂移;斜肋有效拓展了通道换热面积,增强了流体扰动,射流使低温冷却水直接冲击通道底面换热,斜肋和射流两种强化换热方式的综合,不仅大幅降低了通道壁面温度,而且极大提高了壁温分布的均匀性,在增强通道换热的同时也没有带来过大阻力增加,和斜肋直通道和射流微通道相比,射流斜肋微通道的换热系数平均增加了21%和33%,综合换热性能和前两者相当。A numerical simulation was carried out to investigate the flow and heat transfer characteristics of the microchannel with impinging jets and inclinded ribs under a high heat flux density of 300 W/cm^2,which were then compared with the smooth microchannel The results showed that the jet flow suppresses the wake vortex behind inclined rib,and the downstream jet drifts clearly under the erosion of upstream fluid.The inclined rib can effectively increase the heat exchange area and flow disturbance in the microchannel,and the low temperature cooling water impinges directly on the bottom wall by the jet flow and enhance the heat transfer of the microchannel.Combined the inclined rib and impinging jet,the wall temperature of microchannel is decreased greatly,and the uniformity of temperature distribution is improved.Compared with the microchannel with inclined ribs and the microchannel with impinging jets,the heat transfer coefficient of the microchannel with impinging jets and inclinded ribs is increased by 21%and 33%,respectively.The integrated application of impinging jet and inclined fin does not lead to the resistance increase,and the overall performance of the microchannel with impinging jets and inclined ribs is equivalent to the two former microchannels.

关 键 词：微通道 射流 斜肋 强化换热 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]