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Swirl Flow Effects on Flame-Flame Interactions in a Model Lean-Premixed Gas Turbine Combustor

희박 예혼합 모델 가스터빈 연소기에서 스월유동 특성이 화염 간 상호작용에 미치는 영향

  • Lee, Jiho (Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology) ;
  • Park, Junhyeong (Doosan Heavy Industry & Construction) ;
  • Han, Dongsik (Doosan Heavy Industry & Construction) ;
  • Kim, Kyu Tea (Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology)
  • 이지호 (한국과학기술원 항공우주공학과) ;
  • 박준형 (두산중공업 GT연소기개발팀) ;
  • 한동식 (두산중공업 GT연소기개발팀) ;
  • 김규태 (한국과학기술원 항공우주공학과)
  • Received : 2018.01.29
  • Accepted : 2018.03.05
  • Published : 2018.03.30

Abstract

The effect of swirl flow structures on combustion dynamics of two interacting, lean-premixed flames was experimentally investigated, with a particular emphasis on swirl numbers and swirl rotational directions. Our results show that the amplitude of limit cycle oscillations is very sensitive to the combination of swirl numbers and rotational directions, while the instability frequency remains nearly unchanged. The counter-rotating cases show significantly lower pressure perturbations, and this behavior appears to be related to the formation of compact interacting zone with higher heat release rate, indicating the presence of increased flame surface wrinkling caused by intense turbulence.

Acknowledgement

Supported by : 한국에너지기술평가원(KETEP)

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