矩形微通道内油水两相流摩擦压降实验研究
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摘要
研究了微通道内油水两相流的摩擦阻力特性.实验采用横截面为矩形的微通道,其宽度和深度通过化学蚀刻法制作,壁面具有一定的粗糙度,其水力直径分别为167.3μm和192.0μm,相应高宽比为0.673和0.793.利用数字显微摄像技术对矩形截面微通道内油-水两相流的流型进行实时观测,并根据流型选择合适的物理模型,得到了不同含油率时矩形微通道的摩擦压降.实验结果表明:矩形微通道内的摩擦阻力压降与均相理论模型计算结果一致,黏度机理是影响微通道内油水两相流摩擦压降的主要因素.水包油流型向油包水流型的转变是在含油率为60%～70%范围内发生的.
The frictional resistance characteristics of oil-water two-phase flow are experimentally investigated in microchannels,which are processed on the silicon substrate by the micro-etching technique.The hydraulic diameters are 167.35μm and 192.00μm,and the corresponding aspect ratio are 0.673 and 0.793.The appropriate physical model was used in calculating frictional resistance based on real time observation on two-phase flow pattern in horizontal channels.The experimental results indicate that the frictional pressure drop in the rectangular microchannel is consistent with the results of the homogeneous theoretical model.Viscosity mechanism is the main factor affecting frictional pressure loss for oil-water two-phase flow.A transition of oil in water to water in oil occurs whenΦois from 60%to70%.
The frictional resistance characteristics of oil-water two-phase flow are experimentally investigated in microchannels,which are processed on the silicon substrate by the micro-etching technique.The hydraulic diameters are 167.35μm and 192.00μm,and the corresponding aspect ratio are 0.673 and 0.793.The appropriate physical model was used in calculating frictional resistance based on real time observation on two-phase flow pattern in horizontal channels.The experimental results indicate that the frictional pressure drop in the rectangular microchannel is consistent with the results of the homogeneous theoretical model.Viscosity mechanism is the main factor affecting frictional pressure loss for oil-water two-phase flow.A transition of oil in water to water in oil occurs whenΦois from 60%to70%.
引文
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[3]Hanafizadeh P,Karimi A.Experimental investigation of two-phase water-oil flow pressure drop in inclined pipes[J].Experimental Thermal and Fluid Science,2016,74:169-180.
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[8]Karimi H,Boostani M.Heat transfer measurements for oil-water flow of different flow patterns in a horizontal pipe[J].Experimental Thermal&Fluid Science,2016,75:35-42.
[9]Azizi S,Awad M M,Ahmadloo E.Prediction of water holdup in vertical and inclined oil-water two-phase flow using artificial neural network[J].International Journal of Multiphase Flow,2016,80:181-187.
[10]Brauner N,Moalem M D.Flow pattern transitions in two-phase liquid-liquid flow in horizontal tubes[J].International Journal of Multiphase Flow,1992,18(1):123-140.
[11]Angeli P,Hewitt G F.Flow structure in horizontal oil-water flow[J].International Journal of Multiphase Flow,2000,26(7):1117-1140.
[12]Zhao Y,Chen G,Yuan Q,et al.Liquid-liquid twophase flow patterns in a rectangular microchannel[J].AIChE Journal,2006,52(12):4052-4060.
[13]Angeli P,Hewitt G F.Pressure gradient in horizontal liquid-liquid flows[J].International Journal of Multiphase Flow,1999,24(7):1183-1203.
[14]刘磊.水、空气、乳化油多相弹状流的流动特性研究[D].西安:西安交通大学,1998.
[15]陈宣政.垂直上升管内油气水三相流动特性的研究[D].西安:西安交通大学,1991.
[2]Shamsul A,Ismail I.Experimental investigation of oil-water two-phase flow in horizontal pipes:Pressure losses,liquid holdup and flow patterns[J].Journal of Petroleum Science and Engineering,2015,127:409-420.
[3]Hanafizadeh P,Karimi A.Experimental investigation of two-phase water-oil flow pressure drop in inclined pipes[J].Experimental Thermal and Fluid Science,2016,74:169-180.
[4]Adler M N,Mewes D.Flow induced emulsification in the flow of two immiscible liquids in horizontal pipes[J].International Journal of Multiphase Flow,1997,23(1):55-68.
[5]刘文红,郭烈锦,吴铁军,等.水平管油水两相流摩擦阻力特性实验研究[J].工程热物理学报,2002,23(5):627-630.Liu Wenhong,Guo Liejin,Wu Tiejun,et al.An experimental study on frictional pressure loss for oil-water two-phase flow in horizontal pipes[J].Journal of Engineering Thermophysics,2002,23(5):627-630.(in Chinese)
[6]朱红钧,曹妙渝,陈小榆,等.油水两相变径管流动模拟研究[J].内蒙古石油化工,2009,35(2):10-12.Zhu Hongjun,Cao Miaoyu,Chen Xiaoyu,et al.Numerical simulation of the oil-water two-phase flow in variant pipes[J].Inner Mongolia Petrochemical Industry,2009,35(2):10-12.(in Chinese)
[7]王二利,罗小平,韩彦龙,等.矩形微通道两相流流阻压降特性的可视化研究[J].低温与超导,2015,43(1):74-78.Wang Erli,Luo Xiaoping,Han Yanlong,et al.Visualization research of flow resistance characteristics on two-phase flow in rectangular microchannels[J].Cryogenics&Superconductivity,2015,43(1):74-78.(in Chinese)
[8]Karimi H,Boostani M.Heat transfer measurements for oil-water flow of different flow patterns in a horizontal pipe[J].Experimental Thermal&Fluid Science,2016,75:35-42.
[9]Azizi S,Awad M M,Ahmadloo E.Prediction of water holdup in vertical and inclined oil-water two-phase flow using artificial neural network[J].International Journal of Multiphase Flow,2016,80:181-187.
[10]Brauner N,Moalem M D.Flow pattern transitions in two-phase liquid-liquid flow in horizontal tubes[J].International Journal of Multiphase Flow,1992,18(1):123-140.
[11]Angeli P,Hewitt G F.Flow structure in horizontal oil-water flow[J].International Journal of Multiphase Flow,2000,26(7):1117-1140.
[12]Zhao Y,Chen G,Yuan Q,et al.Liquid-liquid twophase flow patterns in a rectangular microchannel[J].AIChE Journal,2006,52(12):4052-4060.
[13]Angeli P,Hewitt G F.Pressure gradient in horizontal liquid-liquid flows[J].International Journal of Multiphase Flow,1999,24(7):1183-1203.
[14]刘磊.水、空气、乳化油多相弹状流的流动特性研究[D].西安:西安交通大学,1998.
[15]陈宣政.垂直上升管内油气水三相流动特性的研究[D].西安:西安交通大学,1991.