한국분무공학회지 (Journal of ILASS-Korea)

  • 제27권1호
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  • Pages.18-25
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  • 2022
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  • 1226-2277(pISSN)
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  • 2288-9051(eISSN)
한국분무공학회 (Institute for Liquid Atomization and Spray Systems-Korea)
권호 표지
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스월-안정화 연소기에서 혼합기 공진모드가 동적 연소특성에 미치는 영향

Effect of Mixing Section Resonance Mode on Dynamic Combustion Characteristics in a Swirl-Stabilized Combustor

  • 투고 : 2022.02.21
  • 심사 : 2022.03.11
  • 발행 : 2022.03.31
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초록

Hot-firing tests were performed to experimentally confirm the effect of the eigenmode in the fuel-air mixing section on combustion instability by changing mixing section length, inlet mean velocity, equivalence ratio, and swirler geometry. A premixed gas composed of air and ethylene was supplied to the combustion chamber through an mixing section and an axial swirler. As the mixing section length increased, the inlet velocity perturbation decreased, but the combustion instability increased more. It was found that the resonance frequency of the first longitudinal mode in the mixing section shifted to the third longitudinal mode as the length of the mixing section increased. The results implied that the transition of the resonace frquency by changing the length of the mixing section might cause combustion instability.

키워드

과제정보

본 논문은 과학기술정보통신부의 재원으로 한국연구재단(NRF-2021M1A3B8077772) 및 한국항공우주연구원(KARI-FR21C00)의 지원을 받아서 수행되었으며, 이에 감사드립니다.

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