Numerical comparison of aerodynamic performance between stationary and moving trains with varied-height windbreak wall under crosswind
This paper investigates the impact of windbreak wall’s heights on the aerodynamic characteristics’ difference of trains between moving and stationary numerical simulation methods. The 1/8 scaled train model with windbreak wall at three heights under crosswind was simulated based on the IDDES turbule...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-01-01
|
| Series: | Alexandria Engineering Journal |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1110016824012067 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841553841513824256 |
|---|---|
| author | Ru-Dai Xue Xiao-Hui Xiong Guang Chen Xiao-Bai Li Bin Liu |
| author_facet | Ru-Dai Xue Xiao-Hui Xiong Guang Chen Xiao-Bai Li Bin Liu |
| author_sort | Ru-Dai Xue |
| collection | DOAJ |
| description | This paper investigates the impact of windbreak wall’s heights on the aerodynamic characteristics’ difference of trains between moving and stationary numerical simulation methods. The 1/8 scaled train model with windbreak wall at three heights under crosswind was simulated based on the IDDES turbulence model. The results found that the error of aerodynamic loads between two simulation methods increases with the elevation of the windbreak wall’s height with the largest value observed in the tail car. Comparing the time-averaged pressure on the train body in the two simulation methods, the most notable disparity manifests in the head car. The negative pressure around head car in stationary case is larger than that in moving case. For stationary simulation, the flow field is primarily influenced by the vortex structures generated at the end of the windbreak wall. In contrast, for moving simulation, the vortex structures on the leeward side of the train are predominantly formed by the detachment from the train’s top. In conclusion, the aerodynamic loads and flow field characteristics of the train exhibit noticeable discrepancies under two simulation methods, and the disparities increase with the elevation of the windbreak wall’s height. |
| format | Article |
| id | doaj-art-ae587bae8bd84b5aafb561b5438a8bec |
| institution | Kabale University |
| issn | 1110-0168 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Alexandria Engineering Journal |
| spelling | doaj-art-ae587bae8bd84b5aafb561b5438a8bec2025-01-09T06:13:25ZengElsevierAlexandria Engineering Journal1110-01682025-01-01110540556Numerical comparison of aerodynamic performance between stationary and moving trains with varied-height windbreak wall under crosswindRu-Dai Xue0Xiao-Hui Xiong1Guang Chen2Xiao-Bai Li3Bin Liu4Key Laboratory of Traffic Safety on Track (Central South University), Ministry of Education, Changsha, Hunan 410075, China; Joint International Research Laboratory of Key Technology for Rail Traffic Safety, Changsha, Hunan 410075, China; National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle, Changsha, Hunan 410075, ChinaKey Laboratory of Traffic Safety on Track (Central South University), Ministry of Education, Changsha, Hunan 410075, China; Joint International Research Laboratory of Key Technology for Rail Traffic Safety, Changsha, Hunan 410075, China; National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle, Changsha, Hunan 410075, ChinaKey Laboratory of Traffic Safety on Track (Central South University), Ministry of Education, Changsha, Hunan 410075, China; Joint International Research Laboratory of Key Technology for Rail Traffic Safety, Changsha, Hunan 410075, China; National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle, Changsha, Hunan 410075, China; Corresponding author at: Key Laboratory of Traffic Safety on Track (Central South University), Ministry of Education, Changsha, Hunan 410075, China.Key Laboratory of Traffic Safety on Track (Central South University), Ministry of Education, Changsha, Hunan 410075, China; Joint International Research Laboratory of Key Technology for Rail Traffic Safety, Changsha, Hunan 410075, China; National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle, Changsha, Hunan 410075, ChinaResearch Institute of Science and Technology of China Railway Urumqi Group Co., Ltd., Urumqi, Xinjiang 830011, ChinaThis paper investigates the impact of windbreak wall’s heights on the aerodynamic characteristics’ difference of trains between moving and stationary numerical simulation methods. The 1/8 scaled train model with windbreak wall at three heights under crosswind was simulated based on the IDDES turbulence model. The results found that the error of aerodynamic loads between two simulation methods increases with the elevation of the windbreak wall’s height with the largest value observed in the tail car. Comparing the time-averaged pressure on the train body in the two simulation methods, the most notable disparity manifests in the head car. The negative pressure around head car in stationary case is larger than that in moving case. For stationary simulation, the flow field is primarily influenced by the vortex structures generated at the end of the windbreak wall. In contrast, for moving simulation, the vortex structures on the leeward side of the train are predominantly formed by the detachment from the train’s top. In conclusion, the aerodynamic loads and flow field characteristics of the train exhibit noticeable discrepancies under two simulation methods, and the disparities increase with the elevation of the windbreak wall’s height.http://www.sciencedirect.com/science/article/pii/S1110016824012067IDDESSimulation methodWindbreak wall heightAerodynamic loadsHigh-speed train |
| spellingShingle | Ru-Dai Xue Xiao-Hui Xiong Guang Chen Xiao-Bai Li Bin Liu Numerical comparison of aerodynamic performance between stationary and moving trains with varied-height windbreak wall under crosswind Alexandria Engineering Journal IDDES Simulation method Windbreak wall height Aerodynamic loads High-speed train |
| title | Numerical comparison of aerodynamic performance between stationary and moving trains with varied-height windbreak wall under crosswind |
| title_full | Numerical comparison of aerodynamic performance between stationary and moving trains with varied-height windbreak wall under crosswind |
| title_fullStr | Numerical comparison of aerodynamic performance between stationary and moving trains with varied-height windbreak wall under crosswind |
| title_full_unstemmed | Numerical comparison of aerodynamic performance between stationary and moving trains with varied-height windbreak wall under crosswind |
| title_short | Numerical comparison of aerodynamic performance between stationary and moving trains with varied-height windbreak wall under crosswind |
| title_sort | numerical comparison of aerodynamic performance between stationary and moving trains with varied height windbreak wall under crosswind |
| topic | IDDES Simulation method Windbreak wall height Aerodynamic loads High-speed train |
| url | http://www.sciencedirect.com/science/article/pii/S1110016824012067 |
| work_keys_str_mv | AT rudaixue numericalcomparisonofaerodynamicperformancebetweenstationaryandmovingtrainswithvariedheightwindbreakwallundercrosswind AT xiaohuixiong numericalcomparisonofaerodynamicperformancebetweenstationaryandmovingtrainswithvariedheightwindbreakwallundercrosswind AT guangchen numericalcomparisonofaerodynamicperformancebetweenstationaryandmovingtrainswithvariedheightwindbreakwallundercrosswind AT xiaobaili numericalcomparisonofaerodynamicperformancebetweenstationaryandmovingtrainswithvariedheightwindbreakwallundercrosswind AT binliu numericalcomparisonofaerodynamicperformancebetweenstationaryandmovingtrainswithvariedheightwindbreakwallundercrosswind |