新型微通道的流动与传热性能研究  

Study on Flow and Heat Transfer Performance of Novel Microchannels

作　　者：王鹏[1] 姚志敏[1] 陈汉玉 张昊[1] 赵谍 袁潇康 WANG Peng;YAO Zhimin;CHEN Hanyu;ZHANG Hao;ZHAO Die;YUAN Xiaokang(School of Naval Architecture Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]武汉理工大学船海与能源动力工程学院,武汉430063

出　　处：《武汉理工大学学报(交通科学与工程版)》2025年第1期74-79,85,共7页Journal of Wuhan University of Technology(Transportation Science & Engineering)

摘　　要：采用数值模拟方法同时结合熵产原理研究不同劈缝形状结构对流体流动传热的影响,分析强化换热的本质原因,对微通道做了综合性能评价.结果表明:随着Re的增大模型的摩擦系数均减小,其中布置带竖直劈缝结构摩擦系数最小,为2.67,其次是布置带交叉劈缝的结构,为3.45;努塞尔数均随雷诺数增大而增大,其中布置交叉劈缝的结构努塞尔数最大,为17.28;布置劈缝可以有效的产生二次流及漩涡,破坏流动边界层及温度边界层进而加强换热,熵产分析表明,模型的传热熵产均随雷诺数增大而降低,而流动熵产随雷诺数增大而增大,综合性能评估表明:η交叉劈缝>η竖直劈缝>η十字劈缝>η横劈缝.综合考虑得出结论:布置交叉劈缝具有最优的换热效果.The numerical simulation method combined with the entropy generation principle was used to study the influence of different slit shapes and structures on fluid flow and heat transfer,analyze the essential reasons for enhancing heat transfer,and evaluate the comprehensive performance of microchannels.The results show that the friction coefficient of the model decreases with the increase of Reynolds number,and the friction coefficient of the structure with vertical slits is the smallest,which is 2.67,followed by the structure with cross slits,which is 3.45.The Nusselt number increases with the increase of Reynolds number,and the Nusselt number of the structure with cross cracks is the largest,which is 17.28.The arrangement of split cracks can effectively produce secondary flow and vortex,destroy the flow boundary layer and temperature boundary layer,and then strengthen heat transfer.The entropy production analysis shows that the heat transfer entropy production of the model decreases with the increase of Reynolds number,while the flow entropy production increases with the increase of Reynolds number.The comprehensive performance evaluation shows thatηcross split>ηvertical split>ηcross split>ηtransverse split.After comprehensive consideration,it is concluded that the arrangement of cross-split joints has the best heat transfer effect.

关 键 词：微通道 强化传热 熵产原理 换热性能 

分 类 号：TK123[动力工程及工程热物理—工程热物理]