Prediction of aerodynamic sound radiation from pantograph of high-speed train

Abstract

Based on the Lattice Boltzmann method, aerodynamic noise from the pantograph of high-speed trains was investigated. The mechanism of the noise generation was analyzed using a simple panhead model, and the numerical procedures were extended to analyze sound radiation from the whole pantograph system. The square and circular cross-sectional cylinders were used to simulate the panheads. The primary noise was generated by flow separation accompanied by vortex shedding. Since the pantograph were consisted of a series of the rods, the primary noise generation characteristics were similar to the simple panhead. From the numerical model, the design of the pantograph for reduced aerodynamic noise generation is proposed and validated.