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含油纳米制冷剂沸腾中碳纳米管相间迁移机制,是评估纳米制冷剂沸腾传热效果和制冷系统中碳纳米管循环能力的基础。本文基于颗粒捕集理论和气浮理论,提出了各因素对碳纳米管相间迁移的影响机制;即碳纳米管迁移率随其长度或直径的增大而增大,制冷剂动力学黏度越小、密度越大,其完全蒸发时碳纳米管迁移率越大,碳纳米管迁移率随润滑油浓度的增大而减小、随热流密度的增大而减小、随初始液位高度的增加而增大。同时通过实验验证了理论分析结果的准确性.
The mechanism of interphase migration of carbon nanotubes in oil-bearing nanometer refrigerants is the basis for evaluating the boiling heat transfer effect of nanoscale refrigerants and the cycling ability of carbon nanotubes in refrigeration systems. In this paper, based on particle trapping theory and air-float theory, the factors that affect the migration of carbon nanotubes are proposed. That is, the mobility of carbon nanotubes increases with the increase of their length or diameter. The smaller the kinematic viscosity of the refrigerant, The higher the density, the more the carbon nanotubes migrate when they are completely evaporated. The mobility of the carbon nanotubes decreases with the increase of the oil concentration and decreases with the increase of the heat flux density. With the increase of the initial liquid level Increase. At the same time, the accuracy of theoretical analysis is verified through experiments.