114 定常的な吸い込みによるパンタグラフ舟体の空力音低減(空力音の計測・制御)

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  • 114 Reduction of aerodynamic noise emitted from pantograph head using steady suction

説明

Reduction of aerodynamic noise emitted from a pantograph head is an important subject for environmental preservation and speed-up of Shinkansen trains. In the present study, control of flow around pantograph head using steady suction near the separation point was studied. The results of wind tunnel test show that the steady suction method can reduce the peak level of narrow-band noise known as the Aeolian tone. The peak level reduction depends on the suction flow rate rather than cross-sectional averaged suction flow speed. However, broad-band noise increases as the suction flow rate increases.

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