Aerodynamic performance analysis of trains on slope topography under crosswinds

This work used the computational fluid dynamics method combined with full-scale train tests to analyze the train aerodynamic performance on special slope topography. Results show that with the increment in the slope gradient, the aerodynamic forces and moment increase sharply. Compared with the flat...

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Bibliographic Details
Published in:Journal of Central South University 2016-09, Vol.23 (9), p.2419-2428
Main Authors: Liu, Tang-hong, Su, Xin-chao, Zhang, Jie, Chen, Zheng-wei, Zhou, Xi-sai
Format: Article
Language:English
Subjects:
Aerodynamic forces
Aerodynamics
Civil
Computational fluid dynamics
Crosswinds
Energy and Traffic Engineering
Engineering
Geological
Metallic Materials
Topography
Wind effects
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Summary:This work used the computational fluid dynamics method combined with full-scale train tests to analyze the train aerodynamic performance on special slope topography. Results show that with the increment in the slope gradient, the aerodynamic forces and moment increase sharply. Compared with the flat ground condition, the lateral force, lift force, and overturning moment of the train on the first line increase by 153.2%, 53.4% and 124.7%, respectively, under the slope gradient of 20°. However, with the increment of the windward side’s depth, the windbreak effect is improved obviously. When the depth is equal to 10 m, compared with the 0 m, the lateral force, lift force and overturning moment of the train on the first line decrease by 70.9%, 77.0% and 70.6%, respectively. Through analyzing the influence of slope parameters on the aerodynamic performance of the train, the relationships among them are established. All these will provide a basic reference for enhancing train aerodynamic performances under different slope conditions and achieve reasonable train speeds for the operation safety in different wind environments.
ISSN:2095-2899
2227-5223
DOI:10.1007/s11771-016-3301-z