Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Numerical Study of Combustion Characteristics Inside a Micro-Tube Combustor

마이크로 튜브 연소기의 연소특성에 대한 수치해석 연구

  • 오창보 (한국기계연구원 에너지기계연구센터) ;
  • 최병일 (한국기계연구원 에너지기계연구센터) ;
  • 한용식 (한국기계연구원 에너지기계연구센터) ;
  • 김명배 (한국기계연구원 에너지기계연구센터)
  • Published : 2005.12.01
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Abstract

Unsteady simulations were performed to investigate the flame structure and the dynamic behavior of a premixed flame exposed to the wall heat loss. A 3-step global reaction mechanism was adopted in this study. Simulations were performed for two tube combustors with inner diameters($d_i$) of 1mm and 4mm. The material of tube combustor was assumed to be a Silicon Nitride($Si_{3}N_4$). The heat loss from the outer tube wall was controlled by adjusting the amount of convective and radiative heat loss. A conical premixed flame could be stabilized inside a tube of $d_i=4mm$. The flame stability inside a tube of $d_i=4mm$ combustor was not much sensitive to the amount of heat loss. In case of a tube of $d_i=1mm$, an oscillating flame was observed in very low heat loss condition and a flame could not be sustained in realistic heat loss condition.

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References

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