Train slipstream is one of the most important aerodynamic effects connected to railway vehicles because it has a direct impact on the safety of passengers on the platform and track workers. A lot of studies were performed to understand the development of this phenomenon in the open field, while fewer analyses were carried out to analyze how the phenomenon modifies in confined spaces, mainly with scaled models or simulations. However, when dealing with numerical simulations, it is not trivial to verify the results accuracy and to compare them with full-scale experimental reference data. This work aims to verify the capability of CFD URANS of developing the slipstream phenomenon in confined spaces, validating the results against experimental full-scale data measured in a real railway tunnel. An ensemble method is then proposed for the post-processing of the CFD results, to compare them to the same statistical quantities considered for the experimental test.

Experimental-numerical analysis of train slipstream in confined spaces

S. Negri;G. Tomasini;P. Schito;D. Rocchi
2024-01-01

Abstract

Train slipstream is one of the most important aerodynamic effects connected to railway vehicles because it has a direct impact on the safety of passengers on the platform and track workers. A lot of studies were performed to understand the development of this phenomenon in the open field, while fewer analyses were carried out to analyze how the phenomenon modifies in confined spaces, mainly with scaled models or simulations. However, when dealing with numerical simulations, it is not trivial to verify the results accuracy and to compare them with full-scale experimental reference data. This work aims to verify the capability of CFD URANS of developing the slipstream phenomenon in confined spaces, validating the results against experimental full-scale data measured in a real railway tunnel. An ensemble method is then proposed for the post-processing of the CFD results, to compare them to the same statistical quantities considered for the experimental test.
2024
BBAA IX
Aerodynamics, trains, slipstream, tunnel, CFD, full-scale measurements
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1278137
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