期刊
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
卷 128, 期 -, 页码 934-953出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijheatmasstransfer.2018.09.047
关键词
Flow regime; Vertical upward flow; Vertical downward flow; Narrow rectangular channel; Void fraction; Electrical impedance method
资金
- National Research Foundation of Korea (NRF) - Korean government (Ministry of Science, ICT) [NRF-2011-0031770, NRF-2017M2B2A9072724]
- National Research Foundation of Korea [2017M2B2A9072724] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Considering the importance of two-phase flows in narrow rectangular channels and their use in various applications, the hydrodynamics of a co-current air-water two-phase flow in a vertical narrow rectangular channel has been studied. Experiments have been carried out and flow regime maps for vertical upward and vertical downward flows have been plotted based on measured data sets. Flow regimes were identified and classified based on visual observation and void fraction data. Flow visualization was performed using a high speed camera, while a void fraction analysis was done using the electrical impedance method and a digital image analysis. Four different flow patterns were identified for the vertical upward flow and seven flow patterns were identified for the vertical downward flow. The flow regime map for the vertical upward flow was compared with previous studies and also with the flow regime map obtained for the vertical downward flow in this study. (C) 2018 Elsevier Ltd. All rights reserved.
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