108 定常的な吹き出しまたは吸い込みによるパンタグラフ舟体の空力音低減(流体関連の音響・振動)

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  • 108 Reduction of aerodynamic noise emitted from pantograph panhead using steady blowing or suction
  • 定常的な吹き出しまたは吸い込みによるパンタグラフ舟体の空力音低減
  • テイジョウテキ ナ フキダシ マタハ スイコミ ニ ヨル パンタグラフ シュウタイ ノ クウリキオン テイゲン

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Reduction of aerodynamic noise emitted from a panhead is a very important subject for environmental preservation and speed-up of Shinkansen trains. In the present study, control of flow around pantograph head using a steady blowing or suction near the separation point was studied. The results of wind tunnel test show that both blowing and suction method can reduce peak level of narrow band noise known as Aeolien tone. It is estimated that blowing or suction flow speed should be above four times larger than the main flow speed to obtain enough aerodynamic noise reduction effect.

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