基于IDDES的动车组隧道不同位置交会数值模拟研究  

Numerical Study of Different Meeting Positions of EMUs in Tunnels Based on IDDES

作　　者：于淼[1,2] 王铁成 Yu Miao;Wang Tiecheng(Key Laboratory of Railway Industry on Aerodynamics,Central South University,Hunan,Changsha 410015,China;Technology Research Center,CRRC Tangshan Co.,Ltd.,Hebei,Tangshan 063000,China)

机构地区：[1]中南大学空气动力学铁路行业重点实验室,湖南长沙410075 [2]中车唐山机车车辆有限公司技术研究中心,河北唐山063000

出　　处：《铁道技术标准（中英文）》2024年第11期17-25,共9页Railway Technical Standard(Chinese & English)

摘　　要：本文利用改进的延迟分离涡模拟(IDDES)方法,对200 km/h动车组在隧道内与350 km/h动车组交会时的气动特性进行了数值模拟研究。研究中考虑了不同交会位置对气动力、列车表面压力以及气密性要求的影响。结果表明,隧道入口处的交会会显著增加列车的阻力,而在隧道内部不同位置交会时,阻力可能出现负值,这主要由于压力波的反射效应导致;在不同位置交会的横向力变化较为一致,但在隧道出口时达到最大值;升力变化较小,负极值在隧道中部位置最为显著;压力分析显示,头车在隧道中部交会时的压力变化最为剧烈;交会位置在隧道中部时,气密性要求最高,临界动态气密性指数达到10.2 s。本文研究结果为高速列车在隧道中的气动设计和气密性标准的制定提供了参考依据,有助于提升列车的安全性和舒适性。This paper employs the Improved Delayed Detached Eddy Simulation(IDDES)method to conduct a numerical simulation study on the aerodynamic characteristics of a 200 km/h EMU train meeting a 350 km/h EMU train inside a tunnel.The study considers the effects of different meeting positions on aerodynamic forces,train surface pressure,and air-tightness requirements.The results show that meeting at the tunnel entrance significantly increases train drag,while at different positions inside the tunnel,drag may turn negative due to the reflection of pressure waves.The variation in lateral forces is relatively consistent across different positions,but reaches a maximum at the tunnel exit.Changes in lift are minor,with the most significant negative peak occurring at the tunnel′s midpoint.Pressure analysis reveals that the head car experiences the most severe pressure fluctuations when meeting at the tunnel′s midpoint.At this position,the highest air-tightness requirement is observed,with the critical dynamic airtightness index reaching 10.2 s.The findings of this study provide reference data for the aerodynamic design and airtightness standards of high-speed trains in tunnels,contributing to improved train safety and comfort.

关 键 词：动车组 隧道 气动效应 气密性 IDDES 

分 类 号：U271[机械工程—车辆工程]