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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 110
PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Paper 49

Towing Tank Experiments for Train Aerodynamics

J. Tschepe1, C.N. Nayeri2, H.J. Schmidt2 and C.O. Paschereit2

1Berlin Institute for Technology Transfer, BIT GmbH, Germany
2Chair of Fluid Dynamics, Hermann-Föttinger-Institut, Technische Universität Berlin, Germany

Full Bibliographic Reference for this paper
J. Tschepe, C.N. Nayeri, H.J. Schmidt, C.O. Paschereit, "Towing Tank Experiments for Train Aerodynamics", in J. Pombo, (Editor), "Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 49, 2016. doi:10.4203/ccp.110.49
Keywords: drag, towing tank, railroad vehicles, aerodynamic, water, wind tunnel.

Summary
This paper gives an overview on different experimental methods for the measurement of the aerodynamic drag of railroad vehicles in general as well as on the measurement of drag of submerged bodies in water in particular. It is shown that water based drag measurements with moving railroad models are very promising in terms of overcoming disadvantages in wind tunnel testing with scaled models. For this reason, a test setup in the water towing tank of the Technical University of Berlin is being developed to adapt the physical boundary conditions including high Reynolds numbers for more accurate results and the possibility to investigate full length model train compositions. Advantages and limitations of these experiments in water are discussed and preliminary results are presented.

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