The Effect of Bogie Positions on the Aerodynamic Behavior of a High-Speed Train: An IDDES Study
Artikel i vetenskaplig tidskrift, 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

Aerodynamic drag

Bogie position

High-speed train

IDDES

Wake flow

Författare

Jiabin Wang

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

Central South University

Guglielmo Minelli

Chalmers, Mekanik och maritima vetenskaper, Strömningslära

Xiujuan Miao

Changsha University of Science and Technology

Jie Zhang

Central South University

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

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, Mekanik och maritima vetenskaper, Strömningslära

Flow, Turbulence and Combustion

1386-6184 (ISSN) 1573-1987 (eISSN)

Vol. In Press

Ämneskategorier

Havs- och vattendragsteknik

Farkostteknik

Strömningsmekanik och akustik

DOI

10.1007/s10494-020-00236-9

Mer information

Senast uppdaterat

2021-01-21