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정적연소기에서 토치의 노즐 직경에 따른 메탄의 연소특성 파악
권순태(Soon Tae Kwon),이정만(Jung Man Lee),박찬준(Chan Jun Park),엄인용(In Young Ohm) 한국가시화정보학회 2009 한국가시화정보학회 학술발표대회 논문집 Vol.2009 No.11
The initial flame development and flame propagation in a constant volume combustion chamber is analyzed by mass burned fraction and combustion enhancement rate. The combustion pressure is measured with a pressure sensor and flame propagation was visualized by shadowgraph method. The mass burned fractions are calculated with combustion pressure. In order to observe the effects of torch-ignition device, five different devices are designed and tested. The result show that the combustion pressure is increased and mass burned fraction is increased when using the torch-ignition device. And combustion enhancement rate is calculated by using combustion pressure. The enhancement rate was improved in comparison with conventional spark ignition. For the result of the visualization, it shows that the torch-ignition cause faster burn than conventional spark ignition. Finally, the visualization showed that the earlier transition to turbulent flame induces the faster burn in torch-ignition.
정적연소기에서 토치의 노즐 직경에 따른 메탄의 연소특성 파악
이정만(Jung Man Lee),권순태(Soon Tae Kwon),박찬준(Chan Jun Park),엄인용(In young Ohm) 한국가시화정보학회 2010 한국가시화정보학회지 Vol.8 No.1
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 토치의 체적 변화에 따른 메탄의 연소특성 파악
권순태(Soon Tae Kwon),박찬준(Chan Jun Park),엄인용(In Young Ohm) 한국가시화정보학회 2011 한국가시화정보학회지 Vol.9 No.1
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 for six different volumes and same orifice size. The combustion pressures were measured to calculate the mass burn 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 burn 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 induced faster burn than conventional spark ignition due to the earlier transition to turbulent flame and larger flame surface, during the initial stage. Finally, the initial flame propagation was affected by torch-ignition volume.