The Effect of Bogie Positions on the Aerodynamic Behavior of a High-Speed Train: An IDDES Study
Journal article, 2021
In this study, an improved delayed detached-eddy simulation method has been used to investigate the aerodynamic behavior of the CRH2 high-speed trains (HST) with different first and last bogie positions. The results of the numerical simulations have been validated against experimental data obtained from a previous wind tunnel test, a full-scale field test and a reduced-scale moving model test. The results of the flow prediction are used to explore the effects of the bogie positions on the slipstream, wake flow, underbody flow and aerodynamic drag. Compared with the original HST model, the downstream movement of the first bogie, has a great effect on decreasing the slipstream velocity and pressure fluctuation aside the HST, especially around the lower part of the HST. Furthermore, the size of the longitudinal vortex structure and slipstream velocity in the near wake region also decrease significantly by moving the last bogie upstream. Additionally, the movement of the first and last bogies toward the HST center, effectively decreases the drag values of the head and tail car, while a lower effect is observed on the intermediate cars.
Slipstream
Wake flow
IDDES
Bogie position
High-speed train
Aerodynamic drag
Author
Jiabin Wang
Central South University
National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle
Guglielmo Minelli
Chalmers, Mechanics and Maritime Sciences (M2), Fluid Dynamics
Xiujuan Miao
Changsha University of Science and Technology
Jie Zhang
National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle
Central South University
Tiantian Wang
National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle
Central South University
Guangjun Gao
Central South University
National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle
Sinisa Krajnovic
Chalmers, Mechanics and Maritime Sciences (M2), Fluid Dynamics
Flow, Turbulence and Combustion
1386-6184 (ISSN) 1573-1987 (eISSN)
Vol. 107 2 257-282Subject Categories (SSIF 2011)
Ocean and River Engineering
Vehicle Engineering
Fluid Mechanics and Acoustics
DOI
10.1007/s10494-020-00236-9