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首页> 外文会议>4th International Conference on Nanochannels, Microchannels and Minichannels 2006(ICNMM2006) pt.B >Frictional Pressure Drop and Two-Phase Flow Pattern of Gas-Liquid Two-Phase Flow in Circular and Rectangular Minichannels
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Frictional Pressure Drop and Two-Phase Flow Pattern of Gas-Liquid Two-Phase Flow in Circular and Rectangular Minichannels

机译：圆形和矩形微型通道中气液两相流的摩擦压降和两相流模式

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摘要

The frictional pressure drops of gas-liquid two-phase flow in mini-pipes and mini-rectangular channels were investigated experimentally. The following test channels were used in the present experiments: commercial stainless-steel circular tubes with 0.6, 0.5 and 0.25 mm in inner diameter, FEP circular tube of 0.4 mm in inner diameter and rectangular channels, made of Acrylic resin, with 0.39 X 20.4 mm, 0.21 X 9.75 mm, 0.26 X 4.28 mm and 0.18 X 1.87 mm in height and width, respectively. The pressure drops of straight pipe, sudden enlargement and sudden contraction of gas-liquid two-phase flow in mini-pipes were measured for the test mini-channels. The pressure drops of rectangular minichannel were also measured. Experimental result showed that measured two-phase friction multipliers agreed well with a conventional Lockhart-Martinelli correlation for circular tubes and Mishima-Hibiki's correlation for rectangular channels. Observed flow patterns by visualization were bubbly, slug, churn, ring and annular flow; the flow patterns in the present experiments were reproduced well by Baker's flow pattern map.
机译：实验研究了微型管道和矩形管道中气液两相流的摩擦压降。本实验中使用了以下测试通道：内径为0.6、0.5和0.25毫米的商用不锈钢圆管，内径为0.4毫米的FEP圆管和由0.39 X 20.4丙烯酸树脂制成的矩形通道高度和宽度分别为1.5毫米，0.21 X 9.75毫米，0.26 X 4.28毫米和0.18 X 1.87毫米。对于测试微型通道，测量了微型管道中直管的压降，气液两相流的突然膨胀和突然收缩。还测量了矩形微型通道的压降。实验结果表明，测得的两相摩擦系数与圆形管的常规Lockhart-Martinelli相关性和矩形通道的Mishima-Hibiki相关性非常吻合。通过可视化观察到的流动模式为气泡状，团状，搅动，环形和环形流动；通过贝克的流型图可以很好地再现本实验中的流型。

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