Aerodynamic performance of a high-speed train passing through three standard tunnel junctions under crosswinds
Journal article, 2020

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.

Numerical simulation

Tunnel junction

IDDES

High-speed train

Crosswind

Author

Xiujuan Miao

Changsha University of Science and Technology

Kan He

Central South University

National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle

Guglielmo Minelli

Chalmers, Mechanics and Maritime Sciences, Fluid Dynamics

Jie Zhang

National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle

Central South University

Guangjun Gao

National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle

Central South University

Hongliang Wei

CRRC Qiqihar Rolling Stock Co., Ltd.

Maosheng He

CRRC Qiqihar Rolling Stock Co., Ltd.

Sinisa Krajnovic

Chalmers, Mechanics and Maritime Sciences, Fluid Dynamics

Applied Sciences (Switzerland)

20763417 (eISSN)

Vol. 10 11 3664

Subject Categories

Geotechnical Engineering

Vehicle Engineering

Fluid Mechanics and Acoustics

DOI

10.3390/app10113664

More information

Latest update

7/1/2020 1