SIMULATION OPTIMIZATION STUDY ON AERODYNAMIC DRAG REDUCTION OF HIGH-SPEED PANTOGRAPH¹⁾

With the development of green and environmentally friendly modern rail transit design concept, pantograph aerodynamic drag reduction has become one of the key problems restricting the speed increase of high-speed train. When the high-speed train is running, the pantograph is exposed outside the streamlined body, which is one of the main sources of train aerodynamic drag. With the increase of train speed, the aerodynamic drag reduction problem of pantograph needs to be solved urgently. In this paper, the distribution of aerodynamic drag of the whole pantograph on a high-speed trail is simulated with computational fluid dynamics (CFD). It is found that the pressure drag of the contact strip and base is the main source of the aerodynamic drag. The optimization scheme of the contact strip and the base aerodynamic drag reduction shell is proposed, and the aerodynamic drag reduction is verified by comparison with the original model. Calculation shows that aerodynamic drag can be reduced by 25.13% and 24.19% in the opening and closing state, respectively, when the drag reduction pantograph runs at 350~km/h.