Numerical evaluation on the decaying swirling flow in a multi-lobed swirl generator
Accurate predictions of decaying swirling flow behavior in the multi-lobed swirl generator (MLSG) are essential for certain engineering applications. In this study, decaying swirling flow characteristics in an MLSG are examined using the Computational Fluid Dynamics (CFD) technique with a Reynolds s...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2020-01-01
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| Series: | Engineering Applications of Computational Fluid Mechanics |
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| Online Access: | http://dx.doi.org/10.1080/19942060.2020.1816494 |
| _version_ | 1818864226852143104 |
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| author | Tie Yan Jingyu Qu Xiaofeng Sun Ye Chen Qiaobo Hu Wei Li |
| author_facet | Tie Yan Jingyu Qu Xiaofeng Sun Ye Chen Qiaobo Hu Wei Li |
| author_sort | Tie Yan |
| collection | DOAJ |
| description | Accurate predictions of decaying swirling flow behavior in the multi-lobed swirl generator (MLSG) are essential for certain engineering applications. In this study, decaying swirling flow characteristics in an MLSG are examined using the Computational Fluid Dynamics (CFD) technique with a Reynolds stress turbulence model (RSM). The effects of different lobe numbers (n) and pitch length ratios (P/D) on swirl intensity, pressure drop, friction factor coefficient, and decay rate are observed with Reynolds number from 50,000 to 125,000. Combined with the pressure loss, the efficiency of swirl induction is evaluated by introducing a swirl effectiveness (SE) evaluation criterion. The initial swirl intensity is shown to first increases and then decreases as lobe number increases. The maximum value is obtained at lobe number n = 4. The pitch length ratios P/D corresponding to the optimal SE value obtained from different lobe also differ. The optimal SE value is achieved at n = 4 and P/D = 8. The friction factor ratio fs/fp decreases as pitch length ratio increases, but the decreasing trend decelerates over time. Correlations based on the numerical predictions of friction factor ratio fs/fp and decay rate β are presented accordingly. |
| first_indexed | 2024-12-19T10:28:18Z |
| format | Article |
| id | doaj.art-5c7084dd9c874c328512a34ebbdb70b8 |
| institution | Directory Open Access Journal |
| issn | 1994-2060 1997-003X |
| language | English |
| last_indexed | 2024-12-19T10:28:18Z |
| publishDate | 2020-01-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Engineering Applications of Computational Fluid Mechanics |
| spelling | doaj.art-5c7084dd9c874c328512a34ebbdb70b82022-12-21T20:25:50ZengTaylor & Francis GroupEngineering Applications of Computational Fluid Mechanics1994-20601997-003X2020-01-011411198121410.1080/19942060.2020.18164941816494Numerical evaluation on the decaying swirling flow in a multi-lobed swirl generatorTie Yan0Jingyu Qu1Xiaofeng Sun2Ye Chen3Qiaobo Hu4Wei Li5College of Petroleum Engineering, Northeast Petroleum UniversityCollege of Petroleum Engineering, Northeast Petroleum UniversityCollege of Petroleum Engineering, Northeast Petroleum UniversityCollege of Petroleum Engineering, Northeast Petroleum UniversityCollege of Petroleum Engineering, Northeast Petroleum UniversityCollege of Petroleum Engineering, Northeast Petroleum UniversityAccurate predictions of decaying swirling flow behavior in the multi-lobed swirl generator (MLSG) are essential for certain engineering applications. In this study, decaying swirling flow characteristics in an MLSG are examined using the Computational Fluid Dynamics (CFD) technique with a Reynolds stress turbulence model (RSM). The effects of different lobe numbers (n) and pitch length ratios (P/D) on swirl intensity, pressure drop, friction factor coefficient, and decay rate are observed with Reynolds number from 50,000 to 125,000. Combined with the pressure loss, the efficiency of swirl induction is evaluated by introducing a swirl effectiveness (SE) evaluation criterion. The initial swirl intensity is shown to first increases and then decreases as lobe number increases. The maximum value is obtained at lobe number n = 4. The pitch length ratios P/D corresponding to the optimal SE value obtained from different lobe also differ. The optimal SE value is achieved at n = 4 and P/D = 8. The friction factor ratio fs/fp decreases as pitch length ratio increases, but the decreasing trend decelerates over time. Correlations based on the numerical predictions of friction factor ratio fs/fp and decay rate β are presented accordingly.http://dx.doi.org/10.1080/19942060.2020.1816494decaying swirling flowswirl intensitycfdfriction factormulti-lobed swirl generator |
| spellingShingle | Tie Yan Jingyu Qu Xiaofeng Sun Ye Chen Qiaobo Hu Wei Li Numerical evaluation on the decaying swirling flow in a multi-lobed swirl generator Engineering Applications of Computational Fluid Mechanics decaying swirling flow swirl intensity cfd friction factor multi-lobed swirl generator |
| title | Numerical evaluation on the decaying swirling flow in a multi-lobed swirl generator |
| title_full | Numerical evaluation on the decaying swirling flow in a multi-lobed swirl generator |
| title_fullStr | Numerical evaluation on the decaying swirling flow in a multi-lobed swirl generator |
| title_full_unstemmed | Numerical evaluation on the decaying swirling flow in a multi-lobed swirl generator |
| title_short | Numerical evaluation on the decaying swirling flow in a multi-lobed swirl generator |
| title_sort | numerical evaluation on the decaying swirling flow in a multi lobed swirl generator |
| topic | decaying swirling flow swirl intensity cfd friction factor multi-lobed swirl generator |
| url | http://dx.doi.org/10.1080/19942060.2020.1816494 |
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