| Single-phase and two-phase flows through helical rectangular channels in single screw expander prototype简 |
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| 引用本文： | 夏国栋,刘献飞,翟玉玲,崔珍珍.Single-phase and two-phase flows through helical rectangular channels in single screw expander prototype简[J].水动力学研究与进展(英文版),2014,26(1):114-121. |
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| 作者姓名： | 夏国栋 刘献飞 翟玉玲 崔珍珍 |
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| 基金项目： | Project supported by the National Basic Research Program of China （973 Program, Grant No. 2011CB710704）, the National Natural Science Foundation of China （Grant No. 51176002） and the Research Fund for the Doctoral Program of Higher Education （Grant No. 20111103110009）. |
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| 摘 要： | The CFD simulations are carried out for the flows in a horizontally oriented helical pipe with various inlet sectional liquid holdups and coil pitches （ H ） . The development of the pressure fields for the single phase air flow and the air-water two-phase flow through the helical rectangular channels is studied. The points with a higher pressure often become the position of expansion leakage. The liquid phase distribution at these points can prevent the leakage of air. It is shown that the increase of the inlet sectional liquid holdup may increase the local liquid holdup at the outmost side of the helical channel. Based on the published pressure drop correla-tion, a new modified relation for predicting the pressure drop in the helical rectangle channel is proposed.
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| 关 键 词： | 矩形通道 螺旋形 螺杆膨胀机 单相 两相流 原型 水平方向 螺旋通道 |
| 收稿时间： | 5 December 2012 |
Single-phase and two-phase flows through helical rectangular channels in single screw expander prototype |
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| XIA Guo-dong,LIU Xian-fei,ZHAI Yu-ling,CUI Zhen-zhen.Single-phase and two-phase flows through helical rectangular channels in single screw expander prototype[J].Journal of Hydrodynamics,2014,26(1):114-121. |
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| Authors: | XIA Guo-dong LIU Xian-fei ZHAI Yu-ling CUI Zhen-zhen |
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| Affiliation: | Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, College of Enviro- nmental and Energy Engineering, Beijing University of Technology, Beijing, China |
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| Abstract: | The CFD simulations are carried out for the flows in a horizontally oriented helical pipe with various inlet sectional liquid holdups and coil pitches (H). The development of the pressure fields for the single phase air flow and the air-water two-phase flow through the helical rectangular channels is studied. The points with a higher pressure often become the position of expansion leakage. The liquid phase distribution at these points can prevent the leakage of air. It is shown that the increase of the inlet sectional liquid holdup may increase the local liquid holdup at the outmost side of the helical channel. Based on the published pressure drop correlation, a new modified relation for predicting the pressure drop in the helical rectangle channel is proposed. |
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| Keywords: | helical channel numerical simulation flow characteristics |
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