Crosswind action on rail vehicles: A methodology for the estimation of the characteristic wind curves

Cheli, Federico; Corradi, Roberto; Tomasini, Gisella Marita

doi:10.1016/j.jweia.2012.04.006

Cited by 57 publications

(36 citation statements)

References 18 publications

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“…Its solutions were based on the finite volume method. The wind speed profile has a large effect on the flow field (Cheli, Corradi, & Tomasini, 2012;Zheng, Zhang, & Gu, 2012), and may interfere with the analysis of the effect of the train length and wind break wall on the aerodynamic performance of a train. However, most of the previous studies, including those of Östh and Krajnović (2014), García, Muñoz-Paniagua, Jiménez, Migoya, and Crespo (2015), and Ashton and Revell (2015), did not consider this effect.…”

Section: Computational Model and Boundary Conditionsmentioning

confidence: 99%

Numerical investigation of the aerodynamic characteristics of high-speed trains of different lengths under crosswind with or without windbreaks

Niu

Zhou

Liang

2017

Engineering Applications of Computational Fluid Mechanics

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The focus of this study was the influence of the length of a train on its aerodynamic performance, with and without wind break walls, under a crosswind. The improvement in the train's aerodynamic performance due to a wind break wall was also analyzed. Aerodynamic coefficients such as the drag force and lateral force were obtained for trains of different lengths using a numerical simulation. A delayed detached eddy simulation based on the shear-stress transport κ-ω turbulent model was used in Fluent 14.0 to simulate the unsteady aerodynamic performances of trains of different lengths under a crosswind. Through a comparison and analysis of the simulation results, the effects of the train length on the forces, pressure, and flow structure around the train were studied, along with the influence of a wind break wall on trains of different lengths. The results showed that the effects on the forces, pressure, and flow structure were focused in the region around the train tail. Furthermore, it was found that a wind break wall could improve the aerodynamic characteristics of a train under a crosswind, but amplified the influence of the train length on the aerodynamic performance of the train tail. These research results provide useful guidance for train operations under a crosswind. ARTICLE HISTORY

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Section: Computational Model and Boundary Conditionsmentioning

confidence: 99%

Numerical investigation of the aerodynamic characteristics of high-speed trains of different lengths under crosswind with or without windbreaks

Niu

Zhou

Liang

2017

Engineering Applications of Computational Fluid Mechanics

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“…The CWC of the freight wagons is computed using a stochastic approach, developed by the research group of the Politecnico di Milano [2,5]. This method is based on the numerical simulation of the dynamics of a vehicle subjected to the action of a real turbulent wind.…”

Section: Computational Procedures Of the Characteristic Wind Curvementioning

confidence: 99%

“…In the first step, the wind speed as a function of the time and the space is defined, according to a stochastic procedure, for specific values of turbulence intensity, integral length scale and mean wind speed [2,5].…”

Section: Computational Procedures Of the Characteristic Wind Curvementioning

confidence: 99%

“…Several studies are present in literature [1,2] analysing the aerodynamics of highspeed trains for passenger transportation. For these reasons the shape of the bodies was optimized to minimize drag and the effect of crosswind on stability and rollover risk.…”

Section: Introductionmentioning

confidence: 99%

“…Data obtained during this research phase were then used as in-put for a numerical model [5,2] allowing to investigate the interaction between the wagon and the turbulent wind. Finally, Characteristics Wind Curves for the wagon are identified for the most critical train-set compositions verifying the forces exchanged through the connection of the container to the flat-wagon.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Study of the Influence of Aerodynamic Loads on the Forces Exchanged in a Twistlock Corner Casting Connection of Flat-Wagons

Gialleonardo¹,

Melzi²,

Resta³

et al.

Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance

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In this paper cross-wind effects on freight wagons are studied. A mathematical model of a freight train made up of a flat-car and one or two containers has been built defining the dynamical characteristics of the connection (twistlock-corner casting). Wind tunnel tests on a scaled model are then used to define the aerodynamic coefficients of the wagon, both in loaded and unloaded conditions, considering different trainset layouts. Wind forces are finally applied separately to the container and the flat-car in order to define the CWC of the wagon and to verify the maximum forces exchanged through the twistlock-corner casting connection. The results of the analysis showed that severe conditions with respect to the risk of rollover can be found as a result of a succession of empty and loaded wagons.

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Safety to Crosswind of Railway Vehicles in Presence of Wind Barriers: Numerical-Experimental Approach

Tomasini

Brambilla

Cii

2020

Lecture Notes in Mechanical Engineering

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Crosswind action on rail vehicles: A methodology for the estimation of the characteristic wind curves

Cited by 57 publications

References 18 publications

Numerical investigation of the aerodynamic characteristics of high-speed trains of different lengths under crosswind with or without windbreaks

Numerical investigation of the aerodynamic characteristics of high-speed trains of different lengths under crosswind with or without windbreaks

A Study of the Influence of Aerodynamic Loads on the Forces Exchanged in a Twistlock Corner Casting Connection of Flat-Wagons

Safety to Crosswind of Railway Vehicles in Presence of Wind Barriers: Numerical-Experimental Approach

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