Large-Eddy Simulation of the Flow Around a Simplified High Speed Train Under the Influence of a Cross-Wind
Paper in proceeding, 2005

Large-eddy simulation (LES) was made to solve the flow around a simplified high speed train under the influence of a cross-wind. The Reynolds number of the flow was Re = 3 x 105 based the height of the train and the incoming air velocity. The results are obtained at a yaw angle (the angle between the relative side wind direction and the train cruising direction) of 90°. Both the instantaneous and the time-averaged flows are explored. Comparison of the LES flow patterns and aerodynamic forces with experimental data was reported. It was found that the LES predicted the flow in agreement with experimental observations. Aerodynamic forces are computed and their time histories are used to find the characteristic frequencies of the flow motion around the body. The results reveal that the dominated flow motion is very small and approaches the resonance frequency of trains.

Side-wind

High-Speed Trains

CFD

LES

Author

Hassan Hemida

Chalmers, Applied Mechanics, Fluid Dynamics

Sinisa Krajnovic

Chalmers, Applied Mechanics, Fluid Dynamics

Lars Davidson

Chalmers, Applied Mechanics, Fluid Dynamics

17th AIAA Computational Fluid Daynamic conference 6-9 June 2005, Toronto, Ontario Canada.

17th AIAA Computational Fluid Dynamics Conference
Toronto, Canada,

Subject Categories

Fluid Mechanics and Acoustics

DOI

10.2514/6.2005-5354

More information

Latest update

8/13/2021