摘要
针对采用声屏障时,高速列车运行过程中表面气动阻力较大的问题,提出利用减载式声屏障降低列车运行过程中受到的气动阻力.采用数值模拟方法,对采用不同孔隙率声屏障时高速列车运行过程中表面的气动阻力及其影响因素进行研究.利用Gambit软件建立了声屏障与高速列车相对运动计算模型;在声屏障孔隙率不同时,采用Fluent软件对350km/h速度行驶的高速列车表面压强分布和气动阻力进行了数值模拟与分析研究.研究结果表明:与普通声屏障相比,随着减载式声屏障孔隙率的增加,列车头车高压区和尾车低压区的面积减小,列车行驶的压差阻力降低,而摩擦阻力变化不大;减载式声屏障具有一定的节能效果,并且随着减载式声屏障孔隙率的增大,节能效果更加明显.
In order to reduce the great aerodynamic dragon the surface of high-speed train under noise barrier,a deloading noise barrier is proposed.Numerical simulation method is adopted to study the characteristics and influencing factors of aerodynamic dragon the surface of high-speed train under noise barrier with varying porosity.The software Gambit is used to establish a calculation model for the relative movement of noise barrier and high-speed train.Besides,the software Fluent is used to conduct numerical simulation and analysis on the surface pressure distribution and aerodynamic drag of high-speed train traveling at 350 km/h.Results show that compared with ordinary noise barrier,the area of the high pressure area in the first train and the low pressure of the last train decrease with the porosity of deloading noise barrier increasing.Besides,pressure diag of running train is reduced,but the friction resistance nearly unchanged.The energy saving effect of train operation on the deloading noise barrier is significant,and the saving effect is more obvious with a high porosity.
作者
赵允刚
王鑫涛
赵晋
屠阳磊
ZHAO Yungang;WANG Xintao;ZHAO Jin;TU Yanglei(China Railway Electrical Industry Co.,Ltd.,Baoding Hebei 071000,China;School of Mechanical,Electronic and Control Engineering,Beijing Jiaotong University,Beijing 100044,China)
出处
《北京交通大学学报》
CAS
CSCD
北大核心
2020年第1期77-83,共7页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
基金
国家重点研发计划(2017YFC0211104)。
关键词
高速列车
减载式声屏障
压强分布
气动阻力
节能
high-speed train
deloading noise barrier
pressure distribution
aerodynamic drag
energy saving
