• 제목/요약/키워드: Lean blowoff

검색결과 1건 처리시간 0.014초

예혼합 보염기 화염의 희박 화염 날림에 음향 가진이 미치는 영향에 관한 연구 (Analysis of Acoustic Excitation Effect on Lean Blowoff in Premixed Bluff Body Flames)

  • 정찬영;황정재;윤지수;김태성;신재익;윤영빈
    • 한국연소학회:학술대회논문집
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    • 한국연소학회 2014년도 제49회 KOSCO SYMPOSIUM 초록집
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    • pp.149-151
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    • 2014
  • The blowoff phenomenon was experimentally investigated in a ducted combustor according to the acoustic excitation. The blowoff equivalence ratio rapidly increases at specific acoustic excitation frequencies. A resonance phenomenon occurs when the excitation frequency approaches the harmonic frequency of the combustor. The resonance increases the velocity fluctuation in the combustor and the infiltration velocity of the unburned gas in the shear layer. Consequently, the mixture velocity exceeds the burning velocity and the blowoff occurs at the higher equivalence ratio.

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