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Effect of Liquid Fuels on the PAH and Soot Formation
Jae Hyuk Choi(최재혁),In Kyu Im(임인규),Byoung Chul Choi(최병철),Hwan-Ho KIM(김환호),Kyoung Woo Lee(이경우),Mann Eung Kim(김만응) 한국마린엔지니어링학회 2009 한국마린엔지니어링학회 학술대회 논문집 Vol.2009 No.-
In order to investigate the effect of benzene (C?H?) and toluene (C?H?) mixing on polycyclic aromatic hydrocarbon (PAH) and soot formation, benzene and toluene have been mixed in counterflow pure ethylene diffusion flame. Laser induced incandescence (LII) and laser induced fluorescence (LIF) techniques have been adopted to measure relative concentrations of soot volume fraction and polycyclic aromatic hydrocarbon (PAH) concentration, respectively. The experimental results showed that the mixing of liquid fuels in ethylene diffusion flame produces more PAHs and soot than that of pure ethylene diffusion flame. Especially, LII signal of 20% toluene flame increased about 3.5 times more than that of pure ethylene diffusion flame. It is considered that methyl (CH₃) radical generated by the initial pyrolysis of benzene can be contributed to the enhancement of PAH and soot formation, through the formation of propargyl (C₃H₃) radical.
대향류 순수 에틸렌 확산 화염 내 매연 생성에 대한 DEM 혼합의 영향
최재혁(Jae Hyuk Choi),김만응(Mann Eung Kim),이경우(Kyoung Woo Lee),최병철(Byung Chul Choi),임인규(In Kyu Im),김환호(Hwan Ho Kim),정석호(Suk Ho Chung) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
In order to investigate the effect of DME mixing on number density and size of soot particle, DME has been mixed in counterflow pure ethylene diffusion flame with the mixture ratios 5 %, 14 % and 30 %. A laser extinction/scattering technique has been adopted to measure the volume fraction, number density, and size of soot particles. The experimental results showed that the soot concentration of mixture flames with the mixture ratios 5 % and 14 % produces soot more, even though that of 30 % was decreased. Numerical results showed that the importance of methyl radicals on the formation of propargyl was emphasized and the propargyl recombination to benzene could lead to the increase in the number density for the cases exhibiting the synergistic effect.