On the effect of rail-end slope in train aerodynamics under crosswind
Railway track models with sloped subgrade ends, are commonly used in studies of train. In the present work, the effect of subgrade-end slope under a yaw angle of 30° was investigated by delayed detached eddy simulation (DDES) using one-eighth-scale train and single-track rail models. The obtained results were validated with wind tunnel tests. Time-averaged aerodynamic coefficients, pressure distribution, and flow field around the train were analysed and compared in three cases with different subgrade-end slopes. The results show that, the lift force of three cars is reduced with increasing subgrade-end slope, while the side force is found to be increased with increasing slope; the overturning moment of head and middle car decrease but which of tail increase. The extreme values occur in the case of 60°. Furthermore, the subgrade-end slope gives a variable impact on pressure distribution and flow pattern in different regions. This work has guiding significance for the selection of rail models in the subsequent train aerodynamic studies.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/00423114
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Supplemental Notes:
- © 2021 Informa UK Limited, trading as Taylor & Francis Group. Abstract reprinted with permission of Taylor & Francis.
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Authors:
- Li, Li
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0000-0002-7580-3559
- Liu, Tanghong
- Guo, Zijian
- Li, Wenhui
- Xia, Yutao
- Publication Date: 2022-6
Language
- English
Media Info
- Media Type: Web
- Features: References;
- Pagination: pp 1888-1908
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Serial:
- Vehicle System Dynamics
- Volume: 60
- Issue Number: 6
- Publisher: Taylor & Francis
- ISSN: 0042-3114
- EISSN: 1744-5159
- Serial URL: https://www.tandfonline.com/toc/nvsd20/current
Subject/Index Terms
- TRT Terms: Aerodynamics; Crosswinds; High speed rail; Scale models; Slopes; Subgrade (Pavements)
- Subject Areas: Railroads; Vehicles and Equipment;
Filing Info
- Accession Number: 01853536
- Record Type: Publication
- Files: TRIS
- Created Date: Jul 29 2022 4:56PM