3D gas-liquid interfaces and flow characteristics of two-phase flows in horizontal tubes
(2021) 8th European Thermal Sciences Conference, EUROTHERM 2021 In Journal of Physics: Conference Series 2116.- Abstract
In order to investigate the characteristics of gas-liquid two-phase flows in horizontal mini circular tubes with inner diameters of 3.14 and 6.68 mm, a prism is adopted to improve the light path in the visualization experimental setup. The front and top views of air-water two-phase flow patterns in two tubes are captured synchronously based on the improved method. Three-dimensional gas-liquid interfaces, flow pattern maps, and void fraction are obtained. The experimental results show that tube diameters have significant effects on flow patterns transition lines in the flow pattern maps, but the void fractions are independent on channel sizes. The effect of gravity gradually decreases with decreasing tube diameter, while that of surface... (More)
In order to investigate the characteristics of gas-liquid two-phase flows in horizontal mini circular tubes with inner diameters of 3.14 and 6.68 mm, a prism is adopted to improve the light path in the visualization experimental setup. The front and top views of air-water two-phase flow patterns in two tubes are captured synchronously based on the improved method. Three-dimensional gas-liquid interfaces, flow pattern maps, and void fraction are obtained. The experimental results show that tube diameters have significant effects on flow patterns transition lines in the flow pattern maps, but the void fractions are independent on channel sizes. The effect of gravity gradually decreases with decreasing tube diameter, while that of surface tension is enhanced. As a consequence, the proportion of annular flow in flow pattern map increases in mini tubes, while the reverse is true for the stratified flow whose proportion decreases dramatically in mini channels. The void fraction increases with increasing gas quality. Experimental void fractions obtained using the three-dimensional gas-liquid interfaces fit well with correlations in the open literature. The shape of PDF distributions varies with flow patterns, which could be used to identify flow patterns in industrial applications.
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- author
- Zhang, Jingzhi LU ; Sunden, Bengt LU ; Wadekar, Vishwas and Wu, Zan LU
- organization
- publishing date
- 2021-12
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- Journal of Physics: Conference Series
- series title
- Journal of Physics: Conference Series
- volume
- 2116
- article number
- 012072
- edition
- 1
- conference name
- 8th European Thermal Sciences Conference, EUROTHERM 2021
- conference location
- Virtual, Online
- conference dates
- 2021-09-20 - 2021-09-22
- external identifiers
-
- scopus:85122476090
- ISSN
- 1742-6588
- DOI
- 10.1088/1742-6596/2116/1/012072
- language
- English
- LU publication?
- yes
- id
- 7650cd04-4571-48bb-aa92-ae53f556e34d
- date added to LUP
- 2022-03-10 13:02:54
- date last changed
- 2023-10-23 05:56:31
@inproceedings{7650cd04-4571-48bb-aa92-ae53f556e34d,
abstract = {{<p>In order to investigate the characteristics of gas-liquid two-phase flows in horizontal mini circular tubes with inner diameters of 3.14 and 6.68 mm, a prism is adopted to improve the light path in the visualization experimental setup. The front and top views of air-water two-phase flow patterns in two tubes are captured synchronously based on the improved method. Three-dimensional gas-liquid interfaces, flow pattern maps, and void fraction are obtained. The experimental results show that tube diameters have significant effects on flow patterns transition lines in the flow pattern maps, but the void fractions are independent on channel sizes. The effect of gravity gradually decreases with decreasing tube diameter, while that of surface tension is enhanced. As a consequence, the proportion of annular flow in flow pattern map increases in mini tubes, while the reverse is true for the stratified flow whose proportion decreases dramatically in mini channels. The void fraction increases with increasing gas quality. Experimental void fractions obtained using the three-dimensional gas-liquid interfaces fit well with correlations in the open literature. The shape of PDF distributions varies with flow patterns, which could be used to identify flow patterns in industrial applications.</p>}},
author = {{Zhang, Jingzhi and Sunden, Bengt and Wadekar, Vishwas and Wu, Zan}},
booktitle = {{Journal of Physics: Conference Series}},
issn = {{1742-6588}},
language = {{eng}},
series = {{Journal of Physics: Conference Series}},
title = {{3D gas-liquid interfaces and flow characteristics of two-phase flows in horizontal tubes}},
url = {{http://dx.doi.org/10.1088/1742-6596/2116/1/012072}},
doi = {{10.1088/1742-6596/2116/1/012072}},
volume = {{2116}},
year = {{2021}},
}