Numerical Study of the Aerodynamic Performance of a Train with a Crosswind for Different Embankment Heights

被引：0
作者：
Xianli Li
Guang Chen
Siniša Krajnovic
Dan Zhou
机构：
[1] Ministry of Education,Key Laboratory of Traffic Safety on Track (Central South University)
[2] Joint International Research Laboratory of Key Technology for Rail Traffic Safety,School of Traffic and Transportation Engineering
[3] Central South University,School of Civil Engineering
[4] Central South University,Department of Mechanics and Maritime Sciences
[5] Chalmers University of Technology,undefined
来源：
Flow, Turbulence and Combustion | 2021年 / 107卷
关键词：
IDDES; Embankment; Crosswind; Slipstream; Flow structures;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A numerical study using improved delayed detached eddy simulation (IDDES) was used to investigate the influence of the embankment height on the aerodynamic performance of a high-speed train travelling under the influence of a crosswind. The results of the flow predictions were used to explore both the instantaneous and the time-averaged flows and the resulting aerodynamic forces, moments and slipstreams. An increase of the aerodynamic drag and side forces as well as the lift force of the head and middle cars were observed with rising embankment height. While the lift force of the tail car decreased with the increasing embankment height. Furthermore, the height of the embankment was found to have a strong influence on the slipstream on the leeward side of the train. The correlation between the embankment height and the slipstream velocity on the windward side, was rather small. The flow structures in the near-wake of the leeward side of the train, responsible for the aerodynamic properties of the train were analyzed, showing strong dependency on the embankment height.
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页码：105 / 123
页数：18
相关论文
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