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Flow, Turbulence and Combustion

, Volume 102, Issue 2, pp 417–434 | Cite as

Investigation of High-Speed Train Drag with Towing Tank Experiments and CFD

  • J. TschepeEmail author
  • D. Fischer
  • C. N. Nayeri
  • C. O. Paschereit
  • S. Krajnovic
Article

Abstract

In order to assess the accuracy of drag prediction methods for high-speed trains, experimental and numerical investigations were performed. Besides the drag coefficient, skin friction and pressure distributions on and near the model have been measured for a 1:22 model of the ICE/V. For the experiments, a moving model rig called DIWA (Drag measurement in water) was realised in a 120 m long towing tank to allow for a realistic simulation of the flow around the train, even in the underbelly region. Numerical investigations were performed using Partially-averaged Navier-Stokes (PANS) simulations based on the k-ω-SST turbulence model. Both experimental and numerical methods can be considered as a novelty in the field of train aerodynamics. The results are compared with data from full-scale tests. It is shown, that the moving model rig DIWA allows for the measurement of drag coefficients of trains with high accuracy. Furthermore, the data acquired using the PANS approach compares well with the experimental data.

Keywords

Towing tank Moving model Drag measurement Train aerodynamics PANS 

Notes

Acknowledgements

The experimental research presented was supported by the ZIM program and the BIT GmbH. The project was funded under grant number EP 141376 from the “Zentrales Innovationsprogramm Mittelstand (ZIM)” of the Federal Ministry of Economy and Energy, following a decision of the German Bundestag.

The simulations were performed with resources provided by the North-German Supercomputing Alliance (HLRN).

Compliance with Ethical Standards

Conflict of interests

The authors declare that they have no conflict of interest.

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Copyright information

© Springer Nature B.V. 2018

Authors and Affiliations

  • J. Tschepe
    • 1
    Email author
  • D. Fischer
    • 2
  • C. N. Nayeri
    • 1
  • C. O. Paschereit
    • 2
  • S. Krajnovic
    • 3
  1. 1.Berliner Institut für Technologietransfer (BIT GmbH)BerlinGermany
  2. 2.Chair of Fluid DynamicsTechnische Universitaet BerlinBerlinGermany
  3. 3.Department of Applied MechanicsChalmers University of TechnologyGothenburgSweden

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