裙板结构对地铁车辆气动性能的影响

Effect of the Apron Structure on Aerodynamic Performance of Metro Vehicles

采用计算流体力学的方法,分别分析了地铁车辆在明线行驶和通过隧道时,车辆转向架及周围裙板结构对地铁车辆整车气动性能的影响。计算结果表明,安装裙板可以有效降低地铁车辆转向架区域的气动阻力,其中对第1台转向架的影响最为显著,但同时也会导致列车车身阻力的增加;安装裙板后的地铁车辆在明线行驶时,整列车的气动性能得到明显改善,但当其通过隧道时,整列车的减阻效果并不明显。

The CFD method is used to analyze the effects of car bogie and the surrounding apron on the aerodynamic performance of metro vehicles respectively when the metro vehicles operate on open railway line and when they pass tunnels.The calculation result shows that installing apron can effectively reduce the aerodynamic resistance at the metro vehicle bogie,among which the effect on the first bogie is the most remarkable,but in the mean time,it can cause increase of resistance of the train body;When the metro vehicle with apron operates on open railway line,the aerodynamic performance of the whole train will be improved obviously,however,when it passes a tunnel,the resistance reduction effect of the whole train will not be remarkable.