船舶电子器件的高热流密度散热问题是一直关注的热点问题。本文采用实验方法，以树枝型多孔微通道为实验对象。探讨不同入口温度、不同混合粒径、质量流率对多孔微通道传热特性的影响，并且对通道内内流型进行可视化分析。与单一粒径微通道相比，混合粒径多孔微通道在相同的热流密度下壁面温度更低，平均换热系数（HTC）和临界热流密度（CHF）更高。这表明混合粒径多孔微通道可大大提升流动沸腾换热性能，大质量流率和进口低过冷度都可提升多孔微通道的换热性能。
The problem of high heat flux and heat dissipation of marine electronic equipment is a hot issue we have always been concerned. In this paper, porous microchannels made by the dendritic copper powder were studied. Some important factors, such as mixed particle sizes, inlet temperatures and mass flux on the heat transfer characteristics of porous microchannels were investigated in detail.The flow patterns in microchannel were visualized by high speed camara. Experiment results showed that the wall superheats of the porous microchannel with the mixed particle size are much lower than that with the single particle size. High mass flux and low subcooling could improve the heat transfer performance of the porous microchannel.
2021,43(7): 162-167 收稿日期：2020-04-26
DOI：10.3404/j.issn.1672-7649.2021.07.033
分类号：TK124
作者简介：陆金铭(1967-),男,博士,副教授,研究方向为船舶动力装置性能仿真与优化
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