| 并联硅基扩缩微通道内气液两相间歇流型与压降特性 |
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| 引用本文： | 柴磊, 夏国栋, 李健, 周明正. 并联硅基扩缩微通道内气液两相间歇流型与压降特性[J]. 北京工业大学学报, 2014, 40(1): 85-90. |
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| 作者姓名： | 柴磊 夏国栋 李健 周明正 |
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| 作者单位： | 北京工业大学环境与能源工程学院,北京100124;中国科学院工程热物理研究所,北京100190;北京工业大学环境与能源工程学院,北京,100124;北京工业大学环境与能源工程学院,北京100124;国家核电技术研发中心,北京 100190 |
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| 基金项目： | 国家自然科学基金资助项目(51176002);国家重点基础研究发展计划资助项目(2011CB710704) |
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| 摘 要： | 采用以IDT高速摄像仪和Nikon生物显微镜为主体的可视化观测系统,实验研究并联硅基扩缩微通道内氮气/水气液两相间歇流型及压降特性.随气液两相表观流速变化,间歇流子流型依次呈现环状/单相液体交替流型、弹状/环状/单相液体交替流型、弹状/单相液体交替流型、雾状/弹状/单相液体交替流型和雾状/单相液体交替流型,得到不同气液两相表观流速下并联扩缩微通道流型分布图.研究表明,均相流模型的压降计算结果同实验值有较大出入.尽管分相流模型在一定程度上引入了气液两相的相互作用,其预测结果好于均相流模型,但是仍无法精确地描述并联扩缩微通道内氮气/水气液两相的运动与空间分布.
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| 关 键 词： | 扩缩 微通道 两相流 压降 |
| 收稿时间： | 2012-10-16 |
Intermittent Flow Pattern and Pressure Drop for Two-phase Flow in Parallel Microchannels With Expansion-constriction Cross Sections |
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| CHAI Lei, XIA Guo-dong, LI Jian, ZHOU Ming-zheng. Intermittent Flow Pattern and Pressure Drop for Two-phase Flow in Parallel Microchannels With Expansion-constriction Cross Sections[J]. Journal of Beijing University of Technology, 2014, 40(1): 85-90. |
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| Authors: | CHAI Lei XIA Guo-dong LI Jian ZHOU Ming-zheng |
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| Affiliation: | CHAI Lei;XIA Guo-dong;LI Jian;ZHOU Ming-zheng;College of Environmental and Energy Engineering,Beijing University of Technology;Institute of Engineering Thermophysics,Chinese Academy of Sciences;State Nuclear Power Technology Research&Develope Center; |
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| Abstract: | The gas-liquid two-phase intermittent flow pattern and pressure drop characteristics in parallel microchannels with expansion-constriction cross sections were investigated experimentally by means of the IDT high-speed camera mounted together with a Nikon microscope.The results showed that,with the change of the gas-liquid two-phase superficial velocity,the annular/liquid alternating flow pattern,the slug/annular/liquid alternating flow pattern,the slug/liquid alternating flow pattern,mist/slug/liquid alternating flow pattern and mist/liquid alternating flow pattern presented in turn.The two-phase flow regime maps for the parallel microchannels with expansion-constriction cross sections were obtained.The homogeneous flow model cannot predict the two-phase pressure drop data.Despite the separated flow model introducing the gas-liquid two-phase interaction to a certain extent,the gas-liquid two-phase movement and space distribution in the parallel microchannels with periodic expansion-constriction cross sections cannot be predicted accurately. |
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| Keywords: | expansion-constriction microchannel two-phase flow pressure drop |
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