车底设备对城际列车气动特性影响研究  

Influence of the bottom structure on the aerodynamic performance of intercity train

作　　者：洪琪琛 杨明智[1] 刘冬雪 HONG Qichen;YANG Mingzhi;LIU Dongxue(Key Laboratory of Traffic Safety on Track,Ministry of Education,School of Traffic&Transportation Engineering,Central South University,Changsha 410075,China)

机构地区：[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

出　　处：《铁道科学与工程学报》2018年第11期2947-2955,共9页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(U11372360);国家科技支撑计划资助项目(2015BAG12B01);国家重点研发计划项目(2016YFB1200602)。

摘　　要：采用数值模拟方法,在明线及横风环境运行条件下,对城际列车安装裙板或设备舱后车底设备的气动性能进行分析。研究结果表明:明线条件下,安装裙板后整车阻力下降7.48%,而采用设备舱结构整车阻力下降10.51%;横风条件下,安装裙板后减少了车底设备的气动阻力,但各节车侧向力增加2%～8%;采用设备舱结构各车阻力下降39.22%,23.52%,30.02%和43.70%,头车侧向力急剧变化,增加了61.76%,列车行驶安全性下降。本文为城际列车的外形优化提供参考依据。Based on the numerical simulation method,the aerodynamic performance of the intercity trains which equipped with skirt plate or equipment cabin was analyzed in detail under the condition of the open air and the crosswind environment.The results indicate that the aerodynamic drag was reduced by 7.48%in the open air when the skirt plates are installed at the bottom of the train,while the aerodynamic drag was reduced by 10.51%when the train equipped with equipment cabin.Under the crosswind condition,the aerodynamic drag can be decreased effectively by installing skirt plates,but the lateral force of each car increased by 2%to 8%;The aerodynamic drag of each car by installing equipment cabin decreased by 39.22%,23.52%,30.02%and 43.70%respectively,the lateral force of the head car changed sharply,which is increased by 61.76%and the driving safety is reduced.This paper provides a reference for the optimization of the optimization of intercity trains.

关 键 词：城际列车 数值计算 气动特性 车底结构 

分 类 号：U271[机械工程—车辆工程]