Simulations of high speed trains

Simulations of high-speed trains under different cross-wind configurations

Today, in Europe, the cross-wind stability of high speed trains must be validated by wind tunnel tests. Wind tunnel tests are usually performed on 1:25 scale models of 2-3 car trains. The legitimacy of the results can be questioned as:

1) The Reynolds numbers are smaller than at full scale,

2) The relative motion of the trains is ignored as the models are static,

3) The air inlets and outlets are not taken into account, and

4) Turbulence intensity of the wind tunnel inlet flow is less than 1% and does not, by any mean, reproduce the atmospheric boundary layer.

This presentation will present:

  1. A validation of the turbulence model and the mesh used to simulate the wind-tunnel setup
  2. The influence of the tunnel geometry
  3. The influence of a moving train
  4. The influence of the Reynolds number
  5. The influence of the air inlet and outlets
Presenter(s): 
Stadler Rail
Steve Cochard
Session Time Slot(s): 
Time: 
06/03/2017 - 2:50pm-06/03/2017 - 3:15pm
Room: 
Convention Hall 1C
Presentation Image: 
Session Track: 

Session Tracks (STAR Global Conference 2017)