고속철도 판토그래프의 공력소음특성 해석

초록

The aero-acoustic analysis around a pantograph of a high speed train is performed. For the grid system, the real shape of the pantograph is utilized and FLUENT is used for the computation of the unsteady flow around the pantograph. Here, large eddy simulation (LES) model is applied for the calculation of the turbulence and aero-acoustic features of the pantograph are estimated by the Ffowcs Williams-Hawkings (FW-H) model. These numerical results are compared with those of experimental results; the aero-acoustic characteristics of the numerical analysis is similar to those of the experimental results and the difference of noise level is about 8dB(A).