Condensation oscillation characteristic of steam with non-condensable gas through multi-hole sparger at low mass flux
To study oscillation characteristic of steam and non-condensable gas direct contact condensation through multi-hole sparger at low mass flux, a series of experiments of pure steam and mixture gas condensation have been carried out under the conditions of steam mass flux of 20–120kg/m2s, water temper...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-02-01
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| Series: | Nuclear Engineering and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573322004661 |
| _version_ | 1829455163483488256 |
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| author | Dandi Zhang Lili Tong Xuewu Cao |
| author_facet | Dandi Zhang Lili Tong Xuewu Cao |
| author_sort | Dandi Zhang |
| collection | DOAJ |
| description | To study oscillation characteristic of steam and non-condensable gas direct contact condensation through multi-hole sparger at low mass flux, a series of experiments of pure steam and mixture gas condensation have been carried out under the conditions of steam mass flux of 20–120kg/m2s, water temperature of 20–95 °C and mass fraction of non-condensable gas of 0–5%. The regime map of pure steam condensation through multi-hole sparger is divided into steam chugging, separated bubble, aggregated bubble and escaping aggregated bubble. The bubbles behavior of synchronization in the same hole columns and desynchronized excitation between different hole columns can be found. The coalescence effect of mixture bubbles increases with water temperature and non-condensable gas content increasing. Pressure oscillation intensity of pure steam condensation first increases and then decreases with water temperature increasing, and increases with steam mass flux increasing. Pressure oscillation intensity of mixture gas condensation decreases with water temperature and non-condensable gas content increasing, which is significantly weaker than that of pure steam condensation. The oscillation dominant frequency decreases with the rise of water temperature and non-condensable gas content. The correlations for oscillation intensity and dominant frequency respectively are developed in pure steam and mixture gas condensation at low mass flux. |
| first_indexed | 2024-04-10T07:56:34Z |
| format | Article |
| id | doaj.art-934c54d852dc44639661a54836bb80f3 |
| institution | Directory Open Access Journal |
| issn | 1738-5733 |
| language | English |
| last_indexed | 2024-04-10T07:56:34Z |
| publishDate | 2023-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj.art-934c54d852dc44639661a54836bb80f32023-02-23T04:30:40ZengElsevierNuclear Engineering and Technology1738-57332023-02-01552780791Condensation oscillation characteristic of steam with non-condensable gas through multi-hole sparger at low mass fluxDandi Zhang0Lili Tong1Xuewu Cao2School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, ChinaCorresponding author.; School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, ChinaSchool of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, ChinaTo study oscillation characteristic of steam and non-condensable gas direct contact condensation through multi-hole sparger at low mass flux, a series of experiments of pure steam and mixture gas condensation have been carried out under the conditions of steam mass flux of 20–120kg/m2s, water temperature of 20–95 °C and mass fraction of non-condensable gas of 0–5%. The regime map of pure steam condensation through multi-hole sparger is divided into steam chugging, separated bubble, aggregated bubble and escaping aggregated bubble. The bubbles behavior of synchronization in the same hole columns and desynchronized excitation between different hole columns can be found. The coalescence effect of mixture bubbles increases with water temperature and non-condensable gas content increasing. Pressure oscillation intensity of pure steam condensation first increases and then decreases with water temperature increasing, and increases with steam mass flux increasing. Pressure oscillation intensity of mixture gas condensation decreases with water temperature and non-condensable gas content increasing, which is significantly weaker than that of pure steam condensation. The oscillation dominant frequency decreases with the rise of water temperature and non-condensable gas content. The correlations for oscillation intensity and dominant frequency respectively are developed in pure steam and mixture gas condensation at low mass flux.http://www.sciencedirect.com/science/article/pii/S1738573322004661Multi-hole spargerCondensation regimePressure oscillationNon-condensable gas |
| spellingShingle | Dandi Zhang Lili Tong Xuewu Cao Condensation oscillation characteristic of steam with non-condensable gas through multi-hole sparger at low mass flux Nuclear Engineering and Technology Multi-hole sparger Condensation regime Pressure oscillation Non-condensable gas |
| title | Condensation oscillation characteristic of steam with non-condensable gas through multi-hole sparger at low mass flux |
| title_full | Condensation oscillation characteristic of steam with non-condensable gas through multi-hole sparger at low mass flux |
| title_fullStr | Condensation oscillation characteristic of steam with non-condensable gas through multi-hole sparger at low mass flux |
| title_full_unstemmed | Condensation oscillation characteristic of steam with non-condensable gas through multi-hole sparger at low mass flux |
| title_short | Condensation oscillation characteristic of steam with non-condensable gas through multi-hole sparger at low mass flux |
| title_sort | condensation oscillation characteristic of steam with non condensable gas through multi hole sparger at low mass flux |
| topic | Multi-hole sparger Condensation regime Pressure oscillation Non-condensable gas |
| url | http://www.sciencedirect.com/science/article/pii/S1738573322004661 |
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