Abstract
One of the problems with the aerodynamic sound, noise reduction along a railway line is very important for further speed-up of a high-speed train. In particular, the aerodynamic sound from a pantograph is one of the main noise sources. As one method for the aerodynamic sound reduction, this study apply to the cylinder with the step rings by a pantograph arm was proposed. Experimental investigation is carried out to clarify the aerodynamic sound and flow field by combination cylinders with the step rings and compared with those of straight cylinder.
