Study of Noise Phenomenon in Supersonic Nozzle with Constant Area Duct

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  • 鄭 星在
    九州大学総合理工学府環境エネルギー工学専攻
  • Aoki Toshiyuki
    Department of Energy and Environmental Engineering, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
  • Yonamine Makiko
    Department of Energy and Environmental Engineering, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
  • Jung Sungae
    Department of Energy and Environmental Engineering, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University

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Other Title
  • 一定断面積ダクトをもつ超音速ノズル内に発生する騒音現象に関する研究
  • イッテイ ダンメンセキ ダクト オ モツ チョウオンソク ノズル ナイ ニ ハッセイ スル ソウオン ゲンショウ ニ カンスル ケンキュウ

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The present paper describes an experimental and numerical works to investigate a noise phenomenon in supersonic flow that are discharged from a convergent-divergent nozzle with a constant area duct. The noise phenomenon of flow is generated by an emission of acoustic tones. The results obtained shows that unlike the frequency of the screech tone due to the shock-cell structures in the jet flow, the one of the acoustic tone due to the shock wave in the nozzle increases proportional to the nozzle pressure ratio. The frequency of the acoustic tone is depending on the distance from the shockwave to nozzle exit.

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