歧管式微通道流动特性的研究  

INVESTIGATION ON FLOW CHARACTERISTICS IN A MANIFOLD MICROCHANNEL (MMC)

作　　者：刘启明[1] 夏国栋[1] 刘青[1] 马晓雁[1] 马重芳[1] 

机构地区：[1]传热强化与过程节能教育部重点实验室北京工业大学环能学院,北京100022

出　　处：《工程热物理学报》2007年第1期80-82,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.50476035);北京市自然科学基金(No.3052004);北京市教委科技发展项目(No.KM200410005008)

摘　　要：岐管式微通道(MMC)热沉具有热阻小、结构紧凑、冷却液流量小、流速低、沿流动方向温度分布均匀等优点。本文针对以去离子水为介质的岐管式微通道(宽W=100μm,深H=300μm)的流动特性进行了实验研究,实验的雷诺数范围为50～3500。结果表明工质在微通道内流态由层流向紊流转变的临界雷诺数提前,此外数值模拟结果与实验值也吻合较好。最后在实验基础上,拟合出工质在层流和紊流下的流动阻力经验关联式。The manifold microchannel （MMC） heat sinks have many advantages such as low thermal resistance, compact structure, little amount of coolant, low flow rate, uniform temperature distribution along the flow direction and many others. Experiments are conducted to investigate flow characteristics of water through a MMC （width=100 μm, height=300 μm）, where the Reynolds Number range from 50 to 3500. Experimental results indicate that the critical Reynolds Number transited from the laminar flow to turbulent flow is in advance. Furthermore, the results given by numerical simulation are almost the same to those of experiments. Based on the experiments, the flow resistance empirical correlations are obtained in laminar flow and turbulent flow regions.

关 键 词：歧管式微通道 压降 摩阻系数 实验关联式 

分 类 号：TK124[动力工程及工程热物理—工程热物理]