重载列车车速对隧道入口段扬尘特征的影响模拟  

Simulation of influence of heavy haul train speed on dust characteristics at tunnel entrance

作　　者：刘秀 撒占友[2] 关达 吴静波 杨鸿克 王昊[2] 卢守青[2] 刘杰[2] LIU Xiu;SA Zhanyou;GUAN Da;WU Jingbo;YANG Hongke;WANG Hao;LU Shouqing;LIU Jie(Transportation Management Department,Guoneng Baoshen Railway Group Co.,Ltd.,Baotou 014010,China;Department of Safety Science and Engineering,Qingdao University of Technology,Qingdao 266520,China)

机构地区：[1]国能包神铁路集团有限责任公司运输管理部,内蒙古包头014010 [2]青岛理工大学安全科学与工程系,山东青岛266520

出　　处：《安全与环境工程》2024年第1期215-223,共9页Safety and Environmental Engineering

基　　金：国家自然科学基金项目(51574153、51974169);山东省自然科学基金项目(ZR2014EEM043、ZR2018PEE001);中国科学院战略性先导科技专项课题项目(XDA05030100)。

摘　　要：为掌握重载列车车速对隧道入口段风流运移及扬尘特征的影响,为铁路隧道抑尘提供技术支持,以梁家山隧道为研究对象,模拟分析了重载列车以不同车速进入隧道时入口段压力场、风流场的演变规律,探究了隧道入口段煤尘颗粒运移轨迹及其浓度分布规律。结果表明:重载列车驶入隧道过程中,车速越大,列车运行前方正压场及车身周边的负压场越强,隧道入口段产生的涡流区及风速越大;重载列车完全驶入隧道后,空间内的煤尘颗粒以内旋和外旋两种运移方式呈高速无序地扩散,同一尾流区断面上,列车不同位置处监测点的煤尘浓度和最大煤尘浓度对应的时间分布有差异。该研究成果有助于理解重载列车运行速度对隧道入口段风流运移及扬尘特征的影响,对梁家山隧道入口段的煤尘防治有指导意义。In order to grasp the influence of heavy haul train speed on the airflow migration and dust characteristics of the tunnel entrance section,and to provide technical support for dust suppression in railway tunnels,in this paper,with Liangjiashan tunnel as the research object,the evolution law of pressure field and airflow field in the entrance section of a heavy haul train entering the tunnel at different speeds was simulated and analyzed.The trajectory and concentration distribution of coal dust particles in the entrance section of tunnel were explored.The results show that when the heavy haul train enters the tunnel,the higher the train speed,the positive pressure field in front of the train and the negative pressure field around the body increase,and the eddy current area and wind speed at the tunnel entrance increase.After the heavy haul train enters the tunnel completely,the coal dust particles in the space diffuse in a high-speed and disorderly manner in the two modes of internal rotation and external rotation.In the same wake area section,the time distribution of coal dust concentration and maximum coal dust concentration at different monitoring points is different.The research results are helpful to understand the influence of the running speed of heavy haul trains on the airflow migration and dust characteristics of the tunnel entrance section,and have guiding significance for the prevention and control of coal dust in the entrance section of Liangjiashan tunnel.

关 键 词：铁路隧道 重载列车车速 压力场 风流运移 扬尘特征 煤尘浓度 

分 类 号：X513[环境科学与工程—环境工程]