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Numerical Simulation of the Flow Around an ICE2 Train Under the Influence of a Wind Gust

Sinisa Krajnovic (Institutionen för tillämpad mekanik, Strömningslära)
INTERNATIONAL CONFERENCE ON RAILWAY ENGINEERING 2008 (IET ICRE2008), Challenges for Railway Transportation in Information Age, 25-28 March, 2008, Hong Kong, China (2008)
[Konferensbidrag, refereegranskat]

Flow around an ICE2 high-speed train exiting a tunnel under the influence of a wind gust has been studied using numerical technique called detached eddy simulation. A wind gust boundary condition was derived to approximate previous experimental observations. The body of the train includes most important details including bogies, plugs, inter-car gaps and rotating wheels on the rail. The maximal yawing and rolling moments which possibly can cause a derailment or overturning were found to occur when approximately one third and one half of the train, respectively, has left the tunnel. These are explained by development of a strong vortex trailing along the upper leeward edge of the train. All aerodynamic forces and moments were monitored during the simulation and the underlying flow structures and mechanisms are explained.

Nyckelord: crosswind stability, wind gust, high-speed train, detached eddy simulation

Denna post skapades 2008-01-15. Senast ändrad 2014-09-29.
CPL Pubid: 66739


Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Strömningslära



Chalmers infrastruktur