Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Turbulent Combustion Characteristics of a Swirl Injector in a Gas Turbine Annular Combustor Using LES and Level-set Flamelet

LES와 Level-set Flamelet 기법을 이용한 가스터빈 환형 연소기용 스월 분사기의 난류 연소 특성

  • Kim, Lina (School of Mechanical and Aerospace Engineering, Korea Aerospace Univ.) ;
  • Hong, Ji-Seok (School of Mechanical and Aerospace Engineering, Korea Aerospace Univ.) ;
  • Jeong, Won Cheol (School of Mechanical and Aerospace Engineering, Korea Aerospace Univ.) ;
  • Yoo, Kwang-Hee (School of Mechanical and Aerospace Engineering, Korea Aerospace Univ.) ;
  • Kim, Jong-Chan (School of Mechanical and Aerospace Engineering, Korea Aerospace Univ.) ;
  • Sung, Hong-Gye (School of Mechanical and Aerospace Engineering, Korea Aerospace Univ.)
  • Received : 2013.06.02
  • Accepted : 2014.03.13
  • Published : 2014.04.01
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Abstract

To investigate the flame dynamics in an annular combustor with single swirl injector, a 3D large-eddy simulation (LES) and a level-set flamelet turbulent combustion model have been implemented. The LM6000 developed by GEAE has been used as the combustor of concern and boundary conditions are based on experimental data. The strong central toroidal recirculation zone induced by the volume expansion of the combustion gas and the vortex breakdown continuously occurred through the procession of the vortex with decreasing strength, are observed.

환형 연소기 내에서의 난류 연소 유동을 해석하고 유동 특성을 도출하기 위해 3차원 large-eddy simulation (LES)를 수행하였다. 연소실 내 복잡한 반응 연소 유동의 화염모사를 위해 level-set flamelet 기법을 적용하였다. 계산 모델로서 GEAE사의 LM6000 환형 싱글 연소기를 이용하였으며 작동 조건은 실험결과에 근거하였다. 연소실 내에서 난류 유동의 중요한 특징인 vortex breakdown과 스월분사기에서 분사되는 연소가스의 팽창으로 인한 중심 재순환 영역, 코너 재순환 영역 등을 관찰하였고, 난류화염 구조를 분석하였다.

Keywords

References

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