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中南大学学报(自然科学版)

Journal of Central South University

第41卷    第5期    总第195期    2010年10月

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文章编号:1672-7207(2010)05-2028-06
线路环境对路堤上列车气动性能的影响
苗秀娟1, 2,田红旗1,高广军1

(1. 中南大学 交通运输工程学院 轨道交通安全教育部重点实验室,湖南 长沙,410075;
2. 长沙理工大学 汽车与机械工程学院,湖南 长沙,410076
)

摘 要: 基于三维定常N-S方程和从风-车-路-场耦合条件下车辆周围的流场结构,分析路堤不同结构形式对列车气动性能的影响。研究结果表明:当路堤迎风面、背风面斜率一致时,随着坡度的减小,横向力与倾覆力矩呈增大的趋势;当cot α从1.5变为2.0时横向力和倾覆力矩变化非常明显,分别增加25.4%和72.3%,其后气动力变化不明显;当迎风面一定时,随着背风面由斜向上逐步向下倾斜直至成为平地,横向力和倾覆力矩以及升力呈显著增大的趋势;与cot β=2.0时相比,cot β=∞即背风面为平地时车辆的横向力和倾覆力矩分别增加63.9%和55.2%。

 

关键字: 车辆工程;路堤;气动性能;数值模拟

Effect of railway environment on aerodynamic performance of
 train on embankment
MIAO Xiu-juan1, 2, TIAN Hong-qi1, GAO Guang-jun1

1. Key Laboratory of Traffic Safety on the Track of Ministry of Education,
School of Traffic & Transportation Engineering, Central South University, Changsha 410075, China;
2. College of Automobile and Machinery Engineering, Changsha University of Science and Technology,
 Changsha 410076, China

Abstract:The effect of different structures of embankment on train aerodynamic performance was analyzed based on the 3-D steady flow N-S equations and the flow structure around the train on the condition of combination of wind and train and railway line and its environment. The results show that when the slop of windward and leeward side of embankment are the same, side force and overturning moment increase with the decrease of the slope of embankment. The side force and overturning moment change obviously when cot α changes from 1.5 to 2.0 increasing by 25.4% and 72.3% respectively, while after that they change very little. When windward side slope is fixed side force and overturning moment increases obviously with the slope of leeward changing from upward-slope to downward-slope gradually until to plane ground. Compared to cot β=2.0, side force and overturning moment increase by 63.9% and 55.2% respectively when cot β=∞ which means that the leeward of the embankment is a plane.

 

Key words: rolling stock engineering; embankment; aerodynamic performance; numerical simulation

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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