中文摘要：

基于标准k-ε双方程湍流模型的雷诺时均方法（RANS）,采用流场计算软件FLUENT对路堤线路周围流场进行数值模拟计算,得到不同高度及不同斜率路堤周围的流场速度分布。研究结果表明：在路堤前方风速会出现驻点,驻点处为测风站最合理的安装位置,该位置与线路最左侧端点的距离分别与路堤高度、斜率呈线性关系;路堤高度和路堤斜率都对线路周围风速分布产生较大影响,当高度一定时,线路上方风速与测风站（或气象站）风速呈线性关系;当斜率一定时,线路上方风速与测风站（或气象站）风速、路堤高度呈双线性关系;当测风站位于下风区时,其规律性不变,仅相关系数发生变化。

英文摘要：

Using Reynolds average Navier-stokes（RANS） simulation method based on standard k-e turbulence model, the flow around the embankment was simulated by flow field calculation software FLUENT, and the speed distribution around the embankment with different slop and different height was obtained. The results show that there is an inflection point of the wind speed before the embankment and the inflection point should be the reasonable location of wind anemometer. The distance from the anemometer station to the left side of the embankment is proportional to the slop of the embankment. The height and the slop of the embankment affect the wind speed distribution seriously, the wind speed above the railway line is proportional to the wind speed from the anemometer station and the height of the embankment. When the wind anemometer is on the leeward of the embankment, the regularity is the same while the correlation coefficient changes.