Numerical Simulation of Flow around a High-Speed Train Subjected to Different Windbreak Walls and Yaw Angles
The prediction of flow around a high-speed train subjected to different windbreak walls and yaw angles has been investigated using steady Shear Stress Transport (SST) k-ω turbulence model at the Reynolds number of 1.0×106 based on the height of the scaled train model. The results show that an effect...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Isfahan University of Technology
2019-01-01
|
| Series: | Journal of Applied Fluid Mechanics |
| Subjects: | |
| Online Access: | http://jafmonline.net/JournalArchive/download?file_ID=49258&issue_ID=1001 |
| _version_ | 1818807684488495104 |
|---|---|
| author | J. Zhang K. He J. Wang T. Liu X. Liang G. Gao |
| author_facet | J. Zhang K. He J. Wang T. Liu X. Liang G. Gao |
| author_sort | J. Zhang |
| collection | DOAJ |
| description | The prediction of flow around a high-speed train subjected to different windbreak walls and yaw angles has been investigated using steady Shear Stress Transport (SST) k-ω turbulence model at the Reynolds number of 1.0×106 based on the height of the scaled train model. The results show that an effective windbreak wall provide a favourable shielding effect for the train behind it, and force the primary positive pressure on the windward of the train to transfer on the wall. Consequently, the airflow cannot directly act on the train body, and the train is basically in an environment with small negative pressure. The inclined slope (the earth embankment type) windbreak wall shows poor anti-wind performance that should not be used along the new high-speed railways. When designing the windbreak wall, the influences of yaw angles should be taken into account. |
| first_indexed | 2024-12-18T19:29:35Z |
| format | Article |
| id | doaj.art-e4339f811c1e4ecbaded47e99810b6bc |
| institution | Directory Open Access Journal |
| issn | 1735-3572 |
| language | English |
| last_indexed | 2024-12-18T19:29:35Z |
| publishDate | 2019-01-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | Journal of Applied Fluid Mechanics |
| spelling | doaj.art-e4339f811c1e4ecbaded47e99810b6bc2022-12-21T20:55:47ZengIsfahan University of TechnologyJournal of Applied Fluid Mechanics1735-35722019-01-0112411371149.Numerical Simulation of Flow around a High-Speed Train Subjected to Different Windbreak Walls and Yaw AnglesJ. Zhang0K. He1J. Wang2T. Liu3X. Liang4G. Gao5Key Laboratory of Traffic Safety on Track of Ministry of Education, Central South UniversityKey Laboratory of Traffic Safety on Track of Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha 410075, ChinaKey Laboratory of Traffic Safety on Track of Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha 410075, ChinaJoint International Research Laboratory of Key Technology for Rail Traffic Safety, Central South University, Changsha 410075, ChinaJoint International Research Laboratory of Key Technology for Rail Traffic Safety, Central South University, Changsha 410075, ChinaKey Laboratory of Traffic Safety on Track of Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha 410075, ChinaThe prediction of flow around a high-speed train subjected to different windbreak walls and yaw angles has been investigated using steady Shear Stress Transport (SST) k-ω turbulence model at the Reynolds number of 1.0×106 based on the height of the scaled train model. The results show that an effective windbreak wall provide a favourable shielding effect for the train behind it, and force the primary positive pressure on the windward of the train to transfer on the wall. Consequently, the airflow cannot directly act on the train body, and the train is basically in an environment with small negative pressure. The inclined slope (the earth embankment type) windbreak wall shows poor anti-wind performance that should not be used along the new high-speed railways. When designing the windbreak wall, the influences of yaw angles should be taken into account.http://jafmonline.net/JournalArchive/download?file_ID=49258&issue_ID=1001High-speed train; Windbreak wall; Yaw angle; Crosswind; Numerical simulation. |
| spellingShingle | J. Zhang K. He J. Wang T. Liu X. Liang G. Gao Numerical Simulation of Flow around a High-Speed Train Subjected to Different Windbreak Walls and Yaw Angles Journal of Applied Fluid Mechanics High-speed train; Windbreak wall; Yaw angle; Crosswind; Numerical simulation. |
| title | Numerical Simulation of Flow around a High-Speed Train Subjected to Different Windbreak Walls and Yaw Angles |
| title_full | Numerical Simulation of Flow around a High-Speed Train Subjected to Different Windbreak Walls and Yaw Angles |
| title_fullStr | Numerical Simulation of Flow around a High-Speed Train Subjected to Different Windbreak Walls and Yaw Angles |
| title_full_unstemmed | Numerical Simulation of Flow around a High-Speed Train Subjected to Different Windbreak Walls and Yaw Angles |
| title_short | Numerical Simulation of Flow around a High-Speed Train Subjected to Different Windbreak Walls and Yaw Angles |
| title_sort | numerical simulation of flow around a high speed train subjected to different windbreak walls and yaw angles |
| topic | High-speed train; Windbreak wall; Yaw angle; Crosswind; Numerical simulation. |
| url | http://jafmonline.net/JournalArchive/download?file_ID=49258&issue_ID=1001 |
| work_keys_str_mv | AT jzhang numericalsimulationofflowaroundahighspeedtrainsubjectedtodifferentwindbreakwallsandyawangles AT khe numericalsimulationofflowaroundahighspeedtrainsubjectedtodifferentwindbreakwallsandyawangles AT jwang numericalsimulationofflowaroundahighspeedtrainsubjectedtodifferentwindbreakwallsandyawangles AT tliu numericalsimulationofflowaroundahighspeedtrainsubjectedtodifferentwindbreakwallsandyawangles AT xliang numericalsimulationofflowaroundahighspeedtrainsubjectedtodifferentwindbreakwallsandyawangles AT ggao numericalsimulationofflowaroundahighspeedtrainsubjectedtodifferentwindbreakwallsandyawangles |