On the anti-rolling performance of a train using a vortex generator array
Vortex generators (VGs) have shown the potential to mitigate the train's operational instability issues caused by strong wind. Numerical simulations are used to predict the flow structures around a train with VGs of different heights. The improved delayed detached eddy simulation (IDDES) hybrid...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2023-12-01
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| Series: | Engineering Applications of Computational Fluid Mechanics |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/19942060.2023.2275614 |
| _version_ | 1797403919351021568 |
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| author | Bin Xu Xiaodong Chen Tanghong Liu Zhengwei Chen Wenhui Li Yutao Xia Xiaoshuai Huo Hongrui Gao Hongkang Liu |
| author_facet | Bin Xu Xiaodong Chen Tanghong Liu Zhengwei Chen Wenhui Li Yutao Xia Xiaoshuai Huo Hongrui Gao Hongkang Liu |
| author_sort | Bin Xu |
| collection | DOAJ |
| description | Vortex generators (VGs) have shown the potential to mitigate the train's operational instability issues caused by strong wind. Numerical simulations are used to predict the flow structures around a train with VGs of different heights. The improved delayed detached eddy simulation (IDDES) hybrid modeling method is adopted to predict the trailing vortices on the leeward field. The numerical method is validated by reproducing wind tunnel test results. The study results reveal that VGs are capable of reducing the rolling moment coefficient around the leeward rail of a train by about 5% ∼ 15% while keeping the drag of the train still lower than its operational drag without crosswind. The control mechanism lies on that the streamwise vortices generated by VGs are attracted to the large-scale trailing vortices, resulting in the pressure on the leeward wall rising. The differences in the domain frequencies between VGs and Baseline cases in POD modes indicate that the VGs changed the periodicity and symmetry of the vorticity fluctuation. This study provides a new method to improve the safety of trains under crosswinds. |
| first_indexed | 2024-03-09T02:46:24Z |
| format | Article |
| id | doaj.art-96580153d82e491b93821997ffcebc12 |
| institution | Directory Open Access Journal |
| issn | 1994-2060 1997-003X |
| language | English |
| last_indexed | 2024-03-09T02:46:24Z |
| publishDate | 2023-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Engineering Applications of Computational Fluid Mechanics |
| spelling | doaj.art-96580153d82e491b93821997ffcebc122023-12-05T16:53:44ZengTaylor & Francis GroupEngineering Applications of Computational Fluid Mechanics1994-20601997-003X2023-12-0117110.1080/19942060.2023.2275614On the anti-rolling performance of a train using a vortex generator arrayBin Xu0Xiaodong Chen1Tanghong Liu2Zhengwei Chen3Wenhui Li4Yutao Xia5Xiaoshuai Huo6Hongrui Gao7Hongkang Liu8Key Laboratory of Traffic Safety on Track of Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha, People’s Republic of ChinaKey Laboratory of Traffic Safety on Track of Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha, People’s Republic of ChinaKey Laboratory of Traffic Safety on Track of Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha, People’s Republic of ChinaDepartment of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, People’s Republic of ChinaKey Laboratory of Traffic Safety on Track of Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha, People’s Republic of ChinaKey Laboratory of Traffic Safety on Track of Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha, People’s Republic of ChinaKey Laboratory of Traffic Safety on Track of Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha, People’s Republic of ChinaKey Laboratory of Traffic Safety on Track of Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha, People’s Republic of ChinaKey Laboratory of Traffic Safety on Track of Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha, People’s Republic of ChinaVortex generators (VGs) have shown the potential to mitigate the train's operational instability issues caused by strong wind. Numerical simulations are used to predict the flow structures around a train with VGs of different heights. The improved delayed detached eddy simulation (IDDES) hybrid modeling method is adopted to predict the trailing vortices on the leeward field. The numerical method is validated by reproducing wind tunnel test results. The study results reveal that VGs are capable of reducing the rolling moment coefficient around the leeward rail of a train by about 5% ∼ 15% while keeping the drag of the train still lower than its operational drag without crosswind. The control mechanism lies on that the streamwise vortices generated by VGs are attracted to the large-scale trailing vortices, resulting in the pressure on the leeward wall rising. The differences in the domain frequencies between VGs and Baseline cases in POD modes indicate that the VGs changed the periodicity and symmetry of the vorticity fluctuation. This study provides a new method to improve the safety of trains under crosswinds.https://www.tandfonline.com/doi/10.1080/19942060.2023.2275614Traincrosswindcomputational fluid dynamicsproper orthogonal decomposition |
| spellingShingle | Bin Xu Xiaodong Chen Tanghong Liu Zhengwei Chen Wenhui Li Yutao Xia Xiaoshuai Huo Hongrui Gao Hongkang Liu On the anti-rolling performance of a train using a vortex generator array Engineering Applications of Computational Fluid Mechanics Train crosswind computational fluid dynamics proper orthogonal decomposition |
| title | On the anti-rolling performance of a train using a vortex generator array |
| title_full | On the anti-rolling performance of a train using a vortex generator array |
| title_fullStr | On the anti-rolling performance of a train using a vortex generator array |
| title_full_unstemmed | On the anti-rolling performance of a train using a vortex generator array |
| title_short | On the anti-rolling performance of a train using a vortex generator array |
| title_sort | on the anti rolling performance of a train using a vortex generator array |
| topic | Train crosswind computational fluid dynamics proper orthogonal decomposition |
| url | https://www.tandfonline.com/doi/10.1080/19942060.2023.2275614 |
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