Railway track models with sloped subgrade ends, are commonly used in studies of train. In the present work, the effect of subgrade-end slope under a yaw angle of 30° was investigated by delayed detached eddy simulation (DDES) using one-eighth-scale train and single-track rail models. The obtained results were validated with wind tunnel tests. Time-averaged aerodynamic coefficients, pressure distribution, and flow field around the train were analysed and compared in three cases with different subgrade-end slopes. The results show that, the lift force of three cars is reduced with increasing subgrade-end slope, while the side force is found to be increased with increasing slope; the overturning moment of head and middle car decrease but which of tail increase. The extreme values occur in the case of 60°. Furthermore, the subgrade-end slope gives a variable impact on pressure distribution and flow pattern in different regions. This work has guiding significance for the selection of rail models in the subsequent train aerodynamic studies.
On the effect of rail-end slope in train aerodynamics under crosswind
Vehicle System Dynamics ; 60 , 6 ; 1888-1908
2022-06-03
21 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
Unsteady vehicle aerodynamics in gusty crosswind
TIBKAT | 2012
|Dynamic characteristics of wheel–rail collision vibration for high-speed train under crosswind
Taylor & Francis Verlag | 2023
|The Effect of a Sheared Crosswind Flow on Car Aerodynamics
SAE Technical Papers | 2017
|Quantitative analysis of vehicle aerodynamics during crosswind gusts
Tema Archiv | 2012
|