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

Large-eddy simulation (LES) is made to solve the flow around a simplified high speed train under the influence of a cross wind. The reynolds number of the flow is Re=300000 based on the height of the train and the incoming air velocity. The results are obtained at a yaw angle of 90 degree. Both the instantaneous and the time-averaged flows are explored. Compareson of the LES flow patterns and aerodynamic forces with experimental data is reported. It is found that the LES predicts the flow in agreement with the experimental observations. Aerodynamic forces are computed and ther time histories are used to find the characteristic frequencies of the flow motion around the train body. The results reveal that the dominated flow motion is very small and approches the resonance frquency of the real trains.

CFD

High-Speed Trains

LES

Side-wind

Författare

Hassan Hemida

Chalmers, Tillämpad mekanik, Strömningslära

Sinisa Krajnovic

Chalmers, Tillämpad mekanik, Strömningslära

Lars Davidson

Chalmers, Tillämpad mekanik, Strömningslära

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

Ämneskategorier

Strömningsmekanik och akustik

Mer information

Skapat

2017-10-06