한국소음진동공학회:학술대회논문집 (Proceedings of the Korean Society for Noise and Vibration Engineering Conference)

한국소음진동공학회 (The Korean Society for Noise and Vibration Engineering)
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원형 충돌제트의 불안정 모드

Unstable Modes of Impinging Circular Jets

  • 권영필 (숭실대학교 기계공학과) ;
  • 임정빈 (숭실대학교 기계공학과 대학원)
  • 발행 : 1997.04.01
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초록

Based on the experiment for the frequency characteristics and the feedback theory of the impinging-tones, the unstable characteristics of the symmetric mode is analyzed among the various unstable modes of circular impinging jets. There are two different symmetric modes; one is the low-frequency mode S1 due to the vortex at the outside of the jet and the high-frequency mode S2 due to the inside vortex. Each mode has its own characterictics of convection speed decreasing with frequency.

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