动力车纵向气动力风洞试验及数值模拟

The Wind Tunnel Test and Numerical Simulation of Longitudinal Aerodynamic Force of the Traction Car

采用风洞试验(在地板抽吸和不抽吸情况下)和数值模拟计算对200km/h动力集中型电动旅客列车组动力车纵向气动力进行了研究,得到了动力车作为头、尾车的纵向气动力系数。结果表明,地板抽吸后,头、尾车空气阻力均有明显增加,头车负升力增加,尾车正升力减少;动力车头、尾两车联挂时底部空气阻力占总的空气阻力的25.9%,列车减阻的重点在车体底部空气阻力。

The wind tunnel tests (in the case of suction plate and normal plate) and numerical simulations of longitudinal aerodynamic force of the 200km/h EMU's traction car are performed, and the longitudinal aerodynamic force coefficients are obtained respectively when the traction car is the front and rear one. The results show that, in the case of suction plate, the aerodynamic drag of the front car and the rear car increase evidently, and the negative lift of the front car increases while the positive lift of the rear decreased; the aerodynamic drag of the sub-floor contributes to the total drag by 25.9 percent. So to decrease drag the emphasis is the sub-floor.