한국추진공학회:학술대회논문집 (Proceedings of the Korean Society of Propulsion Engineers Conference)

한국추진공학회 (The Korean Society of Propulsion Engineers)
권호 표지

선회류에서 화염 핵 발달에 대한 실험적 연구

Experimental study on flame kernel development in swirling flow

  • 유준 (한국과학기술원 기계공학과) ;
  • 배충식 (한국과학기술원 기계공학과) ;
  • Yu, J. (Dept. of Mech. Eng., Korea Advanced Institute of Science and Technology) ;
  • Bae, C. (Dept. of Mech. Eng., Korea Advanced Institute of Science and Technology) ;
  • Sheppard, C.G.W. (School of Mech. Eng., University of Leeds)
  • 발행 : 2001.11.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Flame propagation during the initial stages of ignition in a non-premixed swirl, having some of characteristics of the primary zone of an aero gas turbine combustor, has been investigated. Nd:YAG laser was adopted as the principal ignition source to allow arbitrary placing of the ignition site i subsequent flame development was monitored using a natural light high speed filming technique for many ignition site at two different swirl ratios and an overall equivalence ratio of 0.9. For ignition offset from the burner centreline, buoyancy force associated with radial pressure gradient produced a strong inward movement of the flame kernel. At the burner exit. flame kernels invariably developed into cylindrical form and a 'radial confinement /axia expansion' (RCAE) process was observed.

키워드