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三棱柱由于其流动分离的特殊性，对强制对流换热有着特殊的影响。微通道热沉是一种高热流密度器件散热的先进冷却方案。为进一步增强微通道热沉的传热性能，采用数值模拟方法，研究了入口雷诺数Re为223～893时，规则三棱柱对微通道热沉内传热与流动特性的影响。选取三棱柱的尺寸为WP=0.3～1.2 mm作为研究参数。结果表明，MCS-3(WP=0.7 mm)微通道具有较好的加热壁面温度均匀性与努塞尔数Nu和较小的摩擦系数f，在大部分工况下表现出最大的综合性能评价指标(PEC)。MCS-3微通道内的PEC为1.25～1.65，在Re=893时，获得了最大的PEC值，为1.65。
Abstract：Due to the unique flow separation characteristics of triangular prisms, they have a distinct impact on forced convection heat transfer. Microchannel heat sinks are an advanced cooling solution for high heat flux devices. To further enhance the heat transfer performance of microchannel heat sinks, numerical simulations was used to study the influence of regular triangular prisms on the heat transfer and flow characteristics within microchannel heat sinks at inlet Reynolds numbers Re ranging from 223 to 893. The size of the triangular prisms WP=0.3～1.2 mm is selected as the research parameter. The results show that the microchannel with MCS-3(WP=0.7 mm) achieves better wall temperature uniformity, higher Nusselt number Nu, and lower friction factor f. Under most operating conditions, it also exhibits the highest performance evaluation criterion(PEC). The PEC of the MCS-3 microchannel are 1.25～1.65. The maximum PEC value 1.65 is achieved at Re=893.
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基本信息:
DOI：10.20203/j.cnki.2095-8919.2025.03.012
中图分类号:TK124
引用信息:
[1]苏智立,杨金钢,李茗辰,等.三棱柱微通道热沉强化传热研究[J].吉林建筑大学学报,2025,42(03):76-82.DOI:10.20203/j.cnki.2095-8919.2025.03.012.
基金信息:
吉林省科技成果重点推广计划(2023C033-1)
2025-06-15
2025-06-15