한국추진공학회지 (Journal of the Korean Society of Propulsion Engineers)

  • 제22권3호
  • /
  • Pages.72-80
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  • 2018
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  • 1226-6027(pISSN)
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  • 2288-4548(eISSN)
한국추진공학회 (The Korean Society of Propulsion Engineers)
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환형 가스터빈 연소기에서 네트워크 모델을 이용한 연소불안정 해석

Combustion Instability Analysis Using Network Model in an Annular Gas Turbine Combustor

  • Pyo, Yeongmin (School of Mechanical and Automotive Engineering, Gangneung-Wonju National University) ;
  • Yoon, Myunggon (School of Mechanical and Automotive Engineering, Gangneung-Wonju National University) ;
  • Kim, Daesik (School of Mechanical and Automotive Engineering, Gangneung-Wonju National University)
  • 투고 : 2017.06.04
  • 심사 : 2017.10.27
  • 발행 : 2018.06.01
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초록

연소불안정 현상은 연소기 내부에서 열발생 섭동과 음향 압력 섭동 사이의 피드백 관계로부터 도출된다. 특히 항공용 엔진에 대한 배출 가스 규제가 강화되면서, 환형 연소기에서의 연소불안정 연구에 대한 관심이 크게 증가하고 있다. 본 연구에서는 환형연소기에서 다양한 음향 모드를 계산할 수 있는 열음향 네트워크 모델을 개발 및 사용하였고, 이때 연소 모델은 화염전달함수를 적용하였다. 이와 같은 네트워크 모델을 사용하여 벤치마킹한 환형연소기의 실험데이터와 비교 분석하여 연소불안정 해석을 진행하였다.

Combustion instabilities are caused by the feedback relationship between heat release perturbations and acoustic pressure oscillations in the combustor. Studies on the combustion instability in an annular combustor have recently received great attention due to the enhanced NOx requirement in aero-engines. In this study, a thermoacoustic network model was developed in order to calculate the acoustic characteristics for various modes in the annular combustor. The network model is combined with flame transfer function(FTF) in order to calculate the stability of the combustor. Numerical results are compared with measurement data.

키워드

참고문헌

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