Experimental study on single-phase flow and heat transfer for FC-72 in rectangular microchannels
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摘要: 微槽换热器是解决航空电子设备元器件热控制问题的一条有效途径.以新型电子设备冷却液FC-72为工质,利用4种不同结构尺寸的矩形微槽,进行了微槽内单相流动和强迫对流换热性能实验研究;分析了工质流速、过冷度以及微槽结构等对换热性能的影响,给出了适用于层流和紊流的单相流动阻力特性实验关联式和单相强迫对流换热实验关联式,并对实验结果进行了不确定度分析.结果表明,在矩形微槽换热器中,FC-72的单相强迫对流换热能力能够满足中高强度的电子设备散热要求.Abstract: The microchannel heat sink provides an efficient method to solve thermal control problems of the aviation electronic components. The experiment of single-phaseflow and forced convective heat transfer was carried out with FC-72 which was agood prospective electronic cooling fluid. Four rectangular microchannel heat sinks were used which had different structural parameters. The influences of liquid velocity, supercooling temperature and microchannel structures were analyzed. The correlations of single-phase flow resistance and forced convective heat transfer were given, and the uncertainty for experiment data was evaluated. The results show that the single-phase forced convective heat transfer characteristic of FC-72, flowing in rectangular microchannel heat sinks, can satisfy the heat dissipation requirements of middle or high flux for electronic devices.
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Key words:
- forced convection /
- heat transfer /
- correlation /
- microchannel
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[1] Zhao Zenghui, Yu Jianzu. Single-phase forced convection heat transfer in micro rectangular channels[J]. Chinese Journal of Aeronautics, 2003, 16(1):7~11 [2] Wang Buxuan, Peng Xiaofeng. Experimental investigation on liquid forced convection heat transfer through microchannels[J]. International Journal of Heat and Mass Transfer, 1994, 37(1):73~82 [3] 王补宣, 刘 荣, 彭晓峰, 等. 沿平板具有微槽结构表面的流动沸腾传热实验研究[J]. 工程热物理学报,1995, 16(3):321~326 Wang Buxuan, Liu Rong, Peng Xiaofeng, et al. Research on fluid flow boiling heat transfer on the surface with microchannels[J]. Journal of Engineering Thermophysics, 1995, 16(3):321~326(in Chinese) [4] 辛明道, 师晋生. 微矩形槽道内的受迫对流换热性能研究[J]. 重庆大学学报, 1994, 17(3):117~122 Xin Mingdao, Shi Jinsheng. Experiments on forced convective heat transfer performance in rectangular microchannels[J]. Journal of Chongqing University, 1994, 17(3):117~122(in Chinese) [5] Wu P Y,Little W A. Measurement of heat transfer characteristics of gas flow in fine channel heat exchangers used for micro miniature refrigerators[J]. Cryogenics, 1984, 24(8):415~420 [6] 陈虹夜, 曹 钢, 卢 军. 物理实验中不确定度的估算[J]. 山东轻工业学院学报, 2002, 16(3):73~76 Chen Hongye, Cao Gang, Lu Jun. Estimate of indefinite degree[J]. Journal of Shandong Institute of Light Industry, 2002, 16(3):73~76(in Chinese) -
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