한국연소학회:학술대회논문집

한국연소학회 (The Korean Society of Combustion)
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초음속 확산화염 내의 혼합과 재순환 영역에 대한 충격파의 영향

Effects of Shock Waves on the Mixing and the Recirculation Zone of Supersonic Diffusion Flames

  • 김지호 (서울대학교 항공우주공학과) ;
  • 허환일 (서울대학교 항공우주공학과) ;
  • 최정열 (부산대학교 항공우주공학과) ;
  • 윤영빈 (서울대학교 항공우주공학과) ;
  • 정인석 (서울대학교 항공우주공학과)
  • Kim, Ji-Ho (Department of Aerospace Engineering, Seoul National University) ;
  • Huh, Hwan-Il (Department of Aerospace Engineering, Seoul National University) ;
  • Choi, Jeong-Yeol (Department of Aerospace Engineering, Pusan National University) ;
  • Yoon, Young-Bin (Department of Aerospace Engineering, Seoul National University) ;
  • Jeung, In-Seuck (Department of Aerospace Engineering, Seoul National University)
  • 발행 : 1998.10.09
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초록

A numerical study has been conducted to investigate the effect of shock waves on the mixing and the recirculation zone of a hydrogen jet diffusion flame in a supersonic combustor. The general trends are compared with the experimental results obtained from the supersonic combustor at the University of Michigan. For the numerical simulation of supersonic diffusion flames, multi-species Navier-Stokes equations and detailed chemistry reaction equations of $H_2$-Air are considered. The $K-{\omega}/k-{\varepsilon}$ blended two equation turbulent model is used. Roe's FDS method and MUSCL method are used for convection fluxes in governing equations. Numerical results show that when slender wedges are mounted at the combustor wall the mixing and the combustion are enhanced and the size of recirculation zone is increased . The flame shape of supersonic flames is different in the flame-tip; it is not closed but open. The flame shape is shown to be greatly affected by shock waves.

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