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

The Korean Society of Mechanical Engineers (대한기계학회)
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Combustion Characteristics of Landfill Gas in Constant Volume Combustion Chamber for Large Displacement Volume Engine (III) - Torch Ignition (1) -

대형기관 모사 정적연소실에서 매립지 가스의 연소특성에 대한 연구 (III) - 토치 점화 (1) -

  • Kim, Inok (Graduate school of Energy & Environment, Seoul Nat'l Univ. of Science and Technology) ;
  • Ohm, Inyong (Department of Mechanical and automotive Engineering, Seoul Nat'l Univ. of Science and Technology) ;
  • Kwon, Soon Tae (Graduate school of Energy & Environment, Seoul Nat'l Univ. of Science and Technology)
  • 김인옥 (서울과학기술대학교 에너지환경전문대학원) ;
  • 엄인용 (서울과학기술대학교 기계.자동차공학과) ;
  • 권순태 (서울과학기술대학교 에너지환경전문대학원)
  • Received : 2014.05.08
  • Accepted : 2014.11.14
  • Published : 2015.02.01
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Abstract

This is the third paper on the combustion characteristics of the landfill gas in a constant volume combustion chamber for a large displacement volume commercial engine. It is the first in this series to discuss the effects of the torch device on combustion. The results show that an optimum orifice ratio exists regardless of the torch volume, and a few adverse effects on the combustion are observed for an excessively small orifice ratio. In addition, the torch ignition decreases the initial burn duration, and the decrease in the heat transfer caused by this decreased duration contributes to an increase in the peak combustion pressure. Finally, the torch mostly plays a positive role in shortening the main burn duration when the combustion condition is worsened by a lower methane fraction. Yet, the torch decreases the initial burn duration rather than the main burn as the methane fraction increases.

본 논문은 대형 상용기관을 모사한 정적연소실에서 매립지 가스의 연소 특성에 대한 복수의 논문 중 세 번째로, 정적 연소실에서 토치를 적용하여 그 효과를 분석하였다. 실험 결과 토치의 체적에 관계없이 연소를 개선시키는 최적의 오리피스 면적 비율이 존재하며 오리피스가 매우 작은 경우 압력 상승비율은 직경 변화에 무관하게 일정 수준을 유지하거나 소폭 감소한다. 아울러 토치의 효과는 일차적으로 연소 시간단축에 영향을 주고 시간단축에 따른 전열량의 감소가 이후 압력상승에 기여한다. 마지막으로 메탄 분율이 적어 연소 조건이 나쁠수록 토치는 주로 주 연소 기간을 단축시키고, 반면 연소 조건이 좋은 경우 주로 초기 연소를 단축시키는 효과가 있다.

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References

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