400km/h高速动车组列车气动外形设计选型

Design selection of aerodynamic shape for 400 km/h high-speed EMU

为提升动车组列车设计方案气动外形的选型效率,保证列车良好的气动性能,提出基于数值模拟方法的高速动车组列车气动性能评估模型,并利用流体力学分析软件Fluent对时速400 km/h的7种型号的8编组动车组列车设计方案进行气动性能分析,包括各车体及整车的压差阻力、阻力、阻力系数、升力、升力系数等气动参数。结果表明:整车的压差阻力、整车阻力、整车阻力系数、尾车升力、尾车升力系数在揭示最佳气动外形方案时结果基本是一致的。提出的列车气动评估方法和气动参数有利于对列车设计方案中的最佳气动外形选型。

In order to improve selection efficiency of aerodynamic shape of EMU design scheme and guarantee the good aerodynamic performance of EMU train,an aerodynamic performance evaluation model of high-speed EMU was proposed based on numerical simulation method. Hydromechanics analysis software Fluent was used to perform aerodynamic analyses of seven types of EMU design schemes. There were 8 groups in each type of EMU at 400 km/h. The aerodynamic parameters included differential pressure resistance,resistance,drag coefficient,lift,and lift coefficient of each vehicle body and vehicle.The results showed that the parameters including pressure difference resistance,vehicle resistance,vehicle resistance coefficient,tail lift and tail lift coefficient of the whole vehicle were basically the same while revealing the optimal aerodynamic shape scheme. The aerodynamic evaluation method and aerodynamic parameters proposed in this paper were beneficial to the selection of the optimal aerodynamic shape of train design scheme.