We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Aerodynamic Performance of a High-Speed Train Passing through Three Standard Tunnel Junctions under Crosswinds.
- Authors
Miao, Xiujuan; He, Kan; Minelli, Guglielmo; Zhang, Jie; Gao, Guangjun; Wei, Hongliang; He, Maosheng; Krajnovic, Sinisa
- Abstract
The aerodynamic performance of a high-speed train passing through tunnel junctions under severe crosswind condition was numerically investigated using improved delayed detached-eddy simulations (IDDES). Three ground scenarios connected with entrances and exits of tunnels were considered. In particular a flat ground, an embankment, and a bridge configuration were used. The numerical method was first validated against experimental data, showing good agreement. The results show that the ground scenario has a large effect on the train's aerodynamic performance. The bridge case resulted in generally smaller drag and lift, as well as a lower pressure coefficient on both the train body and the inner tunnel wall, as compared to the tunnel junctions with flat ground and embankment. Furthermore, the bridge configuration contributed to the smallest pressure variation in time in the tunnel. Overall, the study gives important insights on complicated tunnel junction scenarios coupled with severe flow conditions, that, to the knowledge of the authors, were not studied before. Beside this, the results can be used for further improvements in the design of tunnels where such crosswind conditions may occur.
- Subjects
HIGH speed trains; CROSSWINDS; TUNNELS; TUNNEL design &; construction; TIME pressure; ENTRANCES &; exits
- Publication
Applied Sciences (2076-3417), 2020, Vol 10, Issue 11, p3664
- ISSN
2076-3417
- Publication type
Article
- DOI
10.3390/app10113664