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논문 상세정보

메탄/공기 층류 부분예혼합화염의 상세 라디칼(OH*, CH* 그리고 C2*) 정보와 배기매출물에 관한 실험적 연구

Detailed Local Chemiluminescence Measurement (OH*, CH* and C2*) and Nitrogen Oxides Emissions in Laminar Partially Premixed CH4/Air Flames

Abstract

An experimental study was performed to investigate the effects of partially premixing, varying the equivalence ratios from $0.79{\sim}{\infty}$, on NOx emissions and chemiluminescence of excited $OH^{\ast},\;CH^{ast}\;C_2^{\ast}$ radicals in laminar partially premixed flames. the signal from the electronically excited state of $OH^{\ast},\;CH^{ast}\;C_2^{\ast}$ was detected through a band pass filter with a photo multiplier tube, which are processed to the intensity ratio ($C_2^{\ast}/CH^{\ast},\;C_2^{\ast}/OH^{\ast},\;and\;CH^{\ast}/OH^{\ast}$) to reveal the correlation with local equivalence ratio. And measurements of NOx emission were made to investigate the relationship between visible flame appearance, chemiluminescence, and EINOX. The results demonstrated that (1) the flames at ${\phi}<1.59$ exhibited classical double flame structure, at ${\phi}>4.76$, the flames exhibited diffusion flame structure, and the intermediate flames at $1.59<{\phi}<4.76$ was a merged flame, (2) the $OH^{\ast}$ peak was located inside the $CH^{\ast}\;and\;C_2^{\ast}$ radical for all measured conditions and the emission intensity ratio of $C_2^{\ast}/CH^{\ast}\;and\;C_2^{\ast}/OH^{\ast}$ were identified as good marker for local equivalence ratio over a range of ${\phi}=0.79{\sim}1.2\;and\;CH^{\ast}/OH^{\ast}\;is\;0.79<{\phi}<1.9$. However, it was difficult to predict the equivalence ratio in partially premixed flames using this system for ${\phi}>2.38$, (3) the minimum NOX emission index (EINOx) is obtained for a equivalence ratio of 3.19 in the intermediate flames.

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참고문헌 (15)

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  4. Ikeda, Y., Kojima, J., Nakajima, T., Akamatsu, F. and Katsuki, M., 2000, 'Measurement of the Local Flamefront Structure of Turbulent Premixed Flames by Local Chemiluminescence,' Prog. Combust. Inst. 28, pp. 343-350 
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이 논문을 인용한 문헌 (3)

  1. Cho, Bong-Kug ; Choi, Do-Wook ; Kim, Gyu-Bo ; Chang, Young-June ; Song, Ju-Hun ; Jeon, Chung-Hwan 2009. "Effect of the Degree of Fuel-Air Mixing and Equivalence Ratio on the NOx Emission and Heat Release in a Dump Combustor" 大韓機械學會論文集. Transactions of the Korean Society of Mechanical Engineers. B. B, 33(9): 658~665 
  2. Park, Jang-Hee ; Lee, Dae-Keun ; Shin, Hyun-Dong 2010. "Experimental Study on the Effect of Flame Surface Area Fluctuation on the Heat Release Fluctuation in a Premixed Bunsen Flame" 大韓機械學會論文集. Transactions of the Korean Society of Mechanical Engineers. B. B, 34(2): 197~202 
  3. Lee, Young-Jun ; Hwang, Min-Young ; Kim, Gyu-Bo ; Song, Ju-Hun ; Chang, Young-June ; Jeon, Chung-Hwan 2010. "Effect of Nozzle Distance and Angle in the Iron-ore Sintering Dual Burner on Flame Characteristics" 에너지공학 = Journal of energy engineering, 19(3): 163~170 

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