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http://dx.doi.org/10.3795/KSME-B.2002.26.4.555

The Flame Structure of Freely Porpagating CH4/O2/N2Premixed Flames on the O2Enrichment  

Lee, Gi-Yong (Dept.of Mechanical Engineering, Andong National University)
Nam, Tae-Hyeong (Dept.of Mechanical Engineering, Graduate School of Andong National University)
Yu, Hyeon-Seok (Research and Development Center, Korea Gas Corporation)
Choe, Dong-Su (Research and Development Center, Korea Gas Corporation)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.26, no.4, 2002 , pp. 555-560 More about this Journal
Abstract
Numerical simulations of freely propagating flames burning stoichiometric CH$_4$/O$_2$/$N_2$mixtures are performed at atmospheric pressure in order to understand the effect of the $O_2$enrichment level on CH$_4$/Air flame. A chemical kinetic mechanism is employed, the adopted scheme involving 54 gas-phase species and 632 forward reactions. The calculated flame speeds are compared with the experiments for the flames established at several $O_2$enrichment level, the results of which is in excellent agreement. As a result of the increased $O_2$enrichment level from 0.21 to 1, the mole fraction of CO in the burred gas is increased. The flame speed and the temperature in the burned gas are also increased, but the thickness of the flame is severely shrunken in the preheat region. The maximum of the calculated EINO is obtained around 0.6 and 0.7 of the $O_2$enrichment level in cases of flames for fuel-lean mixtures.
Keywords
Freely Propagating Flame; Flame Speed; O$_2$Enrichment; Chemical Kinetic Mechanism;
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Times Cited By KSCI : 2  (Citation Analysis)
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