Numerical estimation of aerodynamic interference between panhead and articulated frame

Abstract

In reducing aerodynamic noise generated by pantographs, it has been found necessary to smooth not only the panhead shape but also that of its support. This is because aerodynamic interference between the panhead and the articulated frame causes distinct aerodynamic noise. However, the details of the mechanism behind such interference have not yet been clarified completely. This paper investigates vortex structures around the panhead and the articulated frame using the CFD technique to show the interference mechanism.