高速列车地面效应数值模拟研究  

Numerical Study on Ground Effect of High Speed Trains

作　　者：孙振旭[1] 郭迪龙[1] 姚远 杨国伟[1] 

机构地区：[1]中国科学院力学研究所流固耦合系统力学重点实验室,北京100190

出　　处：《计算物理》2013年第1期61-69,共9页Chinese Journal of Computational Physics

基　　金：国家科技支撑计划(2009BAG12A03);973计划(2011CB711101)资助项目

摘　　要：采用定常RANS方法对高速列车的地面效应进行分析,研究地面效应影响下高速列车气动力的变化规律.研究地面效应对不同侧偏角下高速列车气动力的影响,发现地面效应对0°侧偏角下的气动力影响最大,并随着侧偏角的增大地面效应的影响逐渐变小;研究当列车与地面相对高度发生变化时高速列车气动力的变化规律,数值模拟结果揭示了高速列车气动升力存在的升力翻转效应,并对不同高度下列车底面的压力脉冲变化规律进行分析.A steady RANS approach is adopted to investigate ground effect of high speed trains. Variation of aerodynamic forces due to ground effect is studied. Comparisons of aerodynamic forces on high speed train at different yaw angles and with different ground boundary conditions are performed. It reveals that aerodynamic forces at a yaw angle of 0° are severely affected by the ground effect. As the yaw angle increases, however, influence on aerodynamic forces due to ground effect gets weaker. Influence of height between bottom of the train and the ground is carefully studied. It shows that lift reversal phenomenon exists at different heights and pressure wave on bottom surface of the train takes a linear relation with heights.

关 键 词：地面效应 湍流模式 侧偏角 高速列车气动力 升力翻转 

分 类 号：U238[交通运输工程—道路与铁道工程]