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권순태(Kwon Soontae),김형식(Kim Hyeongsig),최창연(Choi Changhyeon),박찬준(Park Chanjun),엄인용(Ohm Inyoung) 한국에너지공학회 2010 한국에너지공학회 학술발표회 Vol.2010 No.4
토치 점화 장치의 연소 특성을 파악하기 위하여 6개의 각기 다른 토치 점화 장치를 설계하였다. 토치 점화장치의 체적이 메탄의 연소특성에 미치는 영향을 파악하기 위하여, 토치 점화 장치의 높이(h)와 오리피스 직경(De)는 10㎜와 6㎜로 고정하고, 입구 직경(D)을 12㎜에서 22㎜까지 2㎜씩 증가시키며 토치 점화 장치를 설계하였다. 초기 화염 생성 및 전파는 질량 연소율과 연소 촉진율로 분석하였다. 질량 연소율과 연소 촉진율을 계산하기 위하여 정적 연소실 내의 평균 압력을 측정하였다. 또한 shadow graph법을 이용하여, 초기 화염 생성과 화염 전파과정 전 영역을 가시화하였다. 토치 점화 장치를 사용한 경우에는 일반적인 스파크 점화와 비교하여 질량 연소율의 기울기가 증가하였고, 연소 촉진율도 개선된것을 확인하였다. 토치 점화 장치의 체적이 증가할수록 연소가 개선되었으며, 넓은 점화 표면을 제공하였다. Six different size of torch-ignition device were applied in a constant volume combustion chamber for evaluating the effects of torch-ignition on combustion. The torch-ignition device was designed six different volumes and same orifice size. The combustion pressures were measured to calculate the mass bum fraction and combustion enhancement rate. In addition, the flame propagations were visualized by shadowgraph method for the Qualitative comparison. The result showed that the combustion pressure and mass bum fraction were increased when using the torch ignition device. And the combustion duration were decreased. The combustion enhancement rates of torch-ignition cases were improved in comparison with conventional spark ignition. Finally, the visualization results showed that the torch-ignition device the torch-ignition induced faster bum than conventional spark ignition due to the earlier transition to turbulent flame and larger flame surface, during the initial stage. And the initial flame propagation was effected torch-ignition volume.
정적연소기에서 토치 점화 장치의 오리피스 직경변화에 따른 메탄의 연소특성파악
권순태(Soontae Kwon),김형식(Hyenogsig Kim),최창연(Changyeon Choi),박찬준(Chanjun Park),엄인용(Inyoung Ohm) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
Five different size of orifice were applied in a constant volume combustion chamber for evaluating the effects of torch-ignition on combustion. The initial flame development and flame propagation were analyzed by the mass burned fraction and combustion enhancement rate. The combustion pressures were measured to calculate the mass burned fractions and the combustion enhancement rates. In addition, the flame propagations were visualized by the shadowgraph method for the qualitative comparison. The result showed that the combustion pressure and mass burned fraction were increased when using the torch-ignition device. The combustion enhancement rates of torch-ignition cases were improved in comparison with conventional spark ignition. Finally, the visualization results showed that the torch-ignition induced faster burn than conventional spark ignition due to the earlier transition to turbulent flame and larger flame surface, during the initial stage.
정적연소기에서 토치점화장치의 체적변화에 따른 메탄의 연소특성 파악
권순태(Soontae Kwon),김형식(Hyenogsig Kim),최창연(Changyeon Choi),박찬준(Chanjun Park),엄인용(Inyoung Ohm) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
Six different size of torch-ignition device were applied in a constant volume combustion chamber for evaluating the effects of torch-ignition on combustion. The torch-ignition device was designed six different volumes and same orifice size. The combustion pressures were measured to calculate the mass fraction burned and combustion enhancement rate. In addition, the flame propagations were visualized by shadowgraph method for the qualitative comparison. The result showed that the combustion pressure and mass fraction burned were increased when using the torch ignition device. And the combustion duration were decreased. The combustion enhancement rates of torch-ignition cases were improved in comparison with conventional spark ignition. Finally, the visualization results showed that the torch-ignition device the torch-ignition induced faster burn than conventional spark ignition due to the earlier transition to turbulent flame and larger flame surface, during the initial stage. And the initial flame propagation was effected torch-ignition volume.
정적 연소실에서 토치 점화 장치의 체적 변화에 따른 LFG의 연소 특성
권순태(Soontae Kwon),강민균(Mingyun Kang),김인옥(Inok Kim),박찬준(Chanjun Park),엄인용(Inyoung Ohm) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
Landfill gas mainly involves CH₄, so it can have a great advantage as a commercial fuel. However, Landfill gas also involves CO₂, O₂ and N₂. The CO₂ gas in landfill gas interfere with initial flame development and flame propagation. For evaluating the effect of torch- ignition on initial flame development, three different type of torch-ignition device were applied in a constant volume combustion chamber. The three type of torch-ignition device have a different volume and same size of orifice diameter. The combustion pressure were measured to analyze for combustion enhancement.
권순태(Kwon Soontae),김형식(Kim Hyeongsig),최창현(Choi Changhyeon),박찬준(Park Chanjun),엄인용(Ohm Inyoung) 한국에너지공학회 2010 한국에너지공학회 학술발표회 Vol.2010 No.4
토치 점화 장치의 연소 특성을 파악하기 위하여 7개의 각기 다른 토치 점화 장치를 설계하였다. 토치 점화장치의 오리피스 직경에 따른 특성을 파악하기 위하여, 토치 점화 장치의 체적과 높이는 고정하고, 오리피스 직경을 4㎜에서 16㎜까지 2㎜씩 증가시키며 실험하였다. 초기 화염 생성 및 전파는 절량 연소율과 연소 촉진율로 분석하였다. 질량 연소율과 연소 촉진율을 계산하기 위하여 정적 연소실 내의 평균 압력을 측정하였다. 또한 shadow graph법을 이용하여, 초기 화염 생성과 화염 전파과정 전 영역을 가시화하였다. 토치 점화 장치를 사용한 경우에는 일반적인 스파크 점화와 비교하여 질량 연소율의 기울기가 증가하였고, 연소 촉진율도 개선된것을 확인하였다. 또한 가시화된 이미지를 확인한 결과 토치 점화 장치를 사용하면 초기 화염 발달 단계에서 화염이 난류 화염으로 천이되어 연소가 촉진된것을 확인하였다. Seven different size of orifice were applied in a constant volume combustion chamber for evaluating the effects of torch-ignition on combustion. The initial flame development and flame propagation were analyzed by the mass fraction bum and combustion enhancement rate. The combustion pressures were measured to calculate the mass fraction burn and the combustion enhancement rates. In addition, the flame propagations were visualized by the shadowgraph method for the Qualitative comparison. The result showed that the combustion pressure and mass burned fraction were increased when using the torch-ignition device. The combustion enhancement rates of torch-ignition cases were improved in comparison with conventional spark ignition. Finally, the visualization results showed that the torch-ignition induced faster burn than conventional spark ignition due to the earlier transition to turbulent flame and larger flame surface, during the initial stage.