지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
오류제보하기
Important role of chemical interaction in flame extinction was numerically investigated in downstream interaction among lean(rich) and lean(rich) premixed as well as partially premixed H₂-air and CO-air flames. The strain rate varied from 30 to 5917 s<SUP>-1</SUP> until interacting flame could not be sustained anymore. Flame stability diagrams mapping lower and upper limit fuel concentrations for flame extinction as a function of strain rate are presented. Highly stretched interacting flames were survived only within two islands in the flame stability map where partially premixed mixture consisted of rich H₂-air flame, extremely lean CO-air flame, and a diffusion flame. Further increase in strain rate finally converges to two points. Appreciable amount of hydrogen in the side of lean H₂-air flame also oxidized the CO penetrated from CO-air flame, and this reduced flame speed of the H₂-air flame, leading to flame extinction. At extremely high strain rates, interacting flames were survived only by a partially premixed flame such that it consisted of a very rich H₂-air flame, an extremely lean CO-air flame, and a diffusion flame. In such a situation, both the weaker H₂-air and CO-air flames were parasite on the stronger diffusion flame such that it could lead to flame extinction in the situation of weakening the stronger diffusion flame. Particular concerns are focused on important role of chemical interaction in flame extinction was also discussed in detail.
목차
ABSTRACT
1. 서론
2. 수치해석 및 방법
3. 결과 및 논의
4. 결론
참고문헌
참고문헌 (26)
참고문헌 신청
1. [학술지(정기간행물)] - Vagelopoupos CM / 1994 / Laminar flame speed and extinction strain rates of mixtures of carbon monoxide with hydrogen, methane, and air / Proc Combust Inst 25 : 1317 ~ 1323
2. [학술지(정기간행물)] - Fotache CG / 2000 / Ignition of CO/H2/N2 versus heated air in counterflow : experimental and modeling results / Combust Flame 120 : 417 ~ 426
3. [학술지(정기간행물)] - Park J / 2009 / Chemical effects on added CO2 on the extinction characteristics of H2/CO/CO2 syngas diffusion flames / Int J Hydrogen Energy 34 : 8756 ~ 8762
4. [학술지(정기간행물)] - Vu TM / 2009 / Effects of Hydrocarbon Addition on Celllar Instabilities in Expanding Syngas-Air Spherical Premixed Flames / Int J Hydrogen Energy 34 : 6961 ~ 6969
5. [학술지(정기간행물)] - Vu TM / 2010 / Effects of Diluents on Cellular Instabilites in Outwardly Propagating Spherical Syngas-Air Premixed Flames / Int J Hydrogen Energy 2010; 35 : 3868 ~ 3880
2. [학술지(정기간행물)] - Fotache CG / 2000 / Ignition of CO/H2/N2 versus heated air in counterflow : experimental and modeling results / Combust Flame 120 : 417 ~ 426
3. [학술지(정기간행물)] - Park J / 2009 / Chemical effects on added CO2 on the extinction characteristics of H2/CO/CO2 syngas diffusion flames / Int J Hydrogen Energy 34 : 8756 ~ 8762
4. [학술지(정기간행물)] - Vu TM / 2009 / Effects of Hydrocarbon Addition on Celllar Instabilities in Expanding Syngas-Air Spherical Premixed Flames / Int J Hydrogen Energy 34 : 6961 ~ 6969
5. [학술지(정기간행물)] - Vu TM / 2010 / Effects of Diluents on Cellular Instabilites in Outwardly Propagating Spherical Syngas-Air Premixed Flames / Int J Hydrogen Energy 2010; 35 : 3868 ~ 3880
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UCI(KEPA) : I410-ECN-0101-2015-430-001233628