摘要
基于三维、非定常雷诺时均N-S方程和标准k-ε双方程湍流模型,采用滑移网格技术,对高速列车明线交会及隧道内交会时的空气流场进行数值模拟。研究不同线间距对高速列车交会压力波的影响。研究结果表明:明线交会压力波幅值随线间距的减小而增大,线间距从4.6 m变为4.4 m时,交会压力波幅值增大约8.3%;线间距从4.4 m变为4.2 m时,交会压力波幅值增大约8.5%;隧道交会压力波头波幅值随线间距的减小而增大,对非交会时段隧道压力波影响不大,线间距从4.6m变为4.4 m时,车体表面测点交会压力波头波幅值增大5.7%;线间距从4.4 m变为4.2 m时,交会压力波头波幅值增大5.8%;隧道壁面测点压力波幅值增加约2%,且隧道内2车交会,靠近交会位置的测点压力变化要远大于远离交会位置的测点。
Based on three-dimensional,unsteady Reynolds-averaged N-S equations and standard two-equation turbulence models,the complex air flow field of high-speed train was simulated by sliding grid technology.The influence of the change of line spacing on the pressure wave of high-speed train intersection was studied.The results show that the amplitude of the pressure wave increases with the decrease of the line spacing.The amplitude of the intersection pressure wave increases by8.3%when the line spacing changes from4.6m to4.4m,and the amplitude of the intersection pressure wave increases by8.5%when the line spacing changes from4.4m to4.2m.The amplitude of the intersection pressure wave increases with the decrease of the line spacing,which has little effect on the pressure wave of the whole tunnel.When the line spacing changes from4.6m to4.4m,the amplitude of the intersection pressure wave crest increases by5.7%.When the line spacing varies from4.4m to4.2m,the amplitude of the intersection wave increases by5.8%.The pressure amplitude of the tunnel measuring point increases by about2%.When two high-speed train passing by each other,the amplitude of the intersection wave near the intersection area is far greater than the area which is far away from the intersection area.
作者
魏洋波
梁习锋
WEI Yangbo;LIANG Xifeng(School of Traffic & Transportation Engineering,Central South University, Changsha 410075, China;Key Laboratory of Traffic Safety on Track of Ministry of Education,Changsha 410075, China)
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2017年第12期2525-2531,共7页
Journal of Railway Science and Engineering
基金
高铁联合基金资助项目(U1334205)
中国铁路总公司科技研究开发计划重大资助项目(2015T002-A)
中国铁路总公司科技研究开发计划项目(2016T004-C,Z2015-T003)
关键词
高速铁路
线间距
交会压力波
数值模拟
动模型
high-speed railway
line spacing
intersection pressure wave
numerical simulation
moving model
