强风区挡风墙高度和位置对接触网区域风速的影响

Wind Velocity of Catenary Zone under the influences of Height and Location of Wind-break WALL in Strong Wind Area

强风区挡风墙的修建能有效保障列车的正常安全行驶。而挡风墙高度和位置的变化直接影响到接触网区域的风速,因此是修建挡风墙时必须考虑的重要因素。采用高雷诺数κ-ε紊流模型,建立了列车分别位于1线和2线时的计算模型,应用计算流体动力学软件STAR-CD对接触网区域在强风区挡风墙作用下的风速和仰角进行了数值模拟计算,得出不同条件下接触网区域风速的分布数据。研究结果表明,挡风墙高度为3 m以上和距线路中心5 m时,是比较适合列车行走的位置。

In strong wind area,the erection of wind-break wall can effectively guarantee the train's safe driving.However the variation of height and location of wind-break wall will directly affect the wind velocity of catenary zone,so the height and location of wind-break wall are the important factors that must be considered when the wind-break wall is built.In this article,using the high-Reynolds number k-ε turbulence model,establishing the computation models respectively when train is on line 1 or line 2,and then applying computational fluid dynamics software STAR-CD,the numerical simulation and computation of the wind velocity and elevation angle of catenary zone under the influence of wind-break wall in strong wind area were carried out.Then the velocity distributions in catenary zone were obtained under different condition.Research results show that when the wind-break wall's height is 3m above and the distance to the line center is 5m,it is a suitable location for trains driving.