단일 와동과 상호작용하는 대향류 비예혼합화염 구조에 대한 수치해석 연구

A Numerical Study on the Structure of a Counterflow Nonpremixed Flame Interacting with a Single Vortex

  • 오창보 (인하대학교 대학원 기계공학과) ;
  • 박정 (순천대학교 기계자동차 공학부) ;
  • 이창언 (인하대학교 기계공학부)
  • 발행 : 2002.05.01

초록

A two-dimensional direct numerical simulations was peformed to investigate the flame structure of $CH_4/N_2$-Air counterflow nonpremixed flame interacting with a single vortex. The detailed transport properties and a modified 16-step augmented reduced mechanism based on Miller and Bowman's detailed reaction mechanism were adopted in this calculation. To quantify the strain on flame induced by a vortex, a scalar dissipation rate (SDR) is introduced. Results show that the fuel- and air-side vortex cause an unsteady extinction. In this case, the flame interacting with a vortex is extinguished in much larger SDR than steady flame. It was also found that air- side vortex extinguishes a flame more rapidly than fuel -side vortex.

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