高速用パンタグラフ舟体の二重極音源分布の数値シミュレーション(流体力)

概要

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The aeroacoustic noise caused by pantographs is one of the dominant noises of high speed trains and a large obstacle for further speed-up for Shinkansen. In particular, panheads have a large influence on the aeroacoustic characteristics of pantograph. In this paper, we treat panheads as a two-dimensional prismatic model. The purpose of this paper is to understand the dipole source distribution around a panhead. First, simulation is executed by using the LES technique to obtain fluctuations of the flow field around the panhead simplified as a two-dimensional model. Then, we evaluate dipole sources by applying the Howe's Vortex Sound theory. As a result, it is proved that the time-dependent vorticity fluctuations produce large sound pressure fluctuation.
一般社団法人日本機械学会の論文
2004-03-03