风沙环境下路堤上列车的气动性能分析  

The Aerodynamic Performance Analysis of Trains on Embankment in Blown Sand Environment

作　　者：张传英[1] 张克跃[1] 张继业[1] 

机构地区：[1]西南交通大学牵引动力国家重点实验室,四川成都610031

出　　处：《铁道车辆》2014年第8期5-9,1,共5页Rolling Stock

基　　金：高速铁路基础研究联合基金(U1234208)

摘　　要：利用CFD软件研究风沙环境下列车在路堤上运行的横风气动性能,计算分析了列车横风气动力与沙尘浓度和横风速度之间的关系。计算结果表明,随着风沙环境强度的提高,车体表面的正压区及负压区增大,且列车的气动性能变差;随着沙尘浓度的增加,侧力增幅最大;在同一沙尘浓度环境下,随着横风速度的增加,列车气动力变化剧烈,且与对应的不同强度风沙环境下列车气动力的变化趋势相似。风沙环境下列车气动性能对横风更为敏感,而沙尘仅加剧了列车气动力值的增幅,增加了列车的运行危险性。The CFD software is used to research the cross wind aerodynamic performance of trains on embankment in blown sand environment.The relations between the cross wind aerodynamic performance of trains and the dust density,the cross wind speed are calculated.The calculation result shows that the positive pressure area and negative pressure area on the surface of carbody will increase and the aerodynamic performance of trains will become worse when the strength of the blown sand environment increases;The amplitude of the increase of lateral force will go up when the dust density increases;In the environment of the same dust density,when the cross wind speed increases,the aerodynamic force of the train will change violently,and the changing tendency of it shall be similar to that of the aerodynamic forces of trains under environments corresponding to different strengths of blown sand.The aerodynamic performance of the train becomes more sensitive to cross wind in blown sand environment,and the dust only increases the amplitude of the aerodynamic force of the trains as well as increases the operation danger of the train.

关 键 词：列车 气动性能 风沙 路堤 

分 类 号：U270.11[机械工程—车辆工程]