Theoretical analysis of NO formation near the primary reaction zone in methane combustion
✍ Scribed by J.H. Ay; M. Sichel
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- English
- Weight
- 780 KB
- Volume
- 26
- Category
- Article
- ISSN
- 0010-2180
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✦ Synopsis
The complete kinetics of the CH4-air reaction are used to study the details of NO formation near the primary reaction zone. The species and energy conservation equations are used in the analysis, however, diffusion and heat conduction within the reaction zone are neglected. The overshoot of the concentrations of the radicals O, OH, and H over their post flame equilibrium values appears to explain the phenomenon of "prompt NO" due to the very high NO formation rate near the flame for values of the equivalence ratio ~b ~ 1.1. The effects of flame parameters on this radical overshoot are investigated. In addition, the results of the equilibrium theory, which has been used by previous authors to compute NO formation, have been compared in the detailed kinetic calculations. Computations with and without HO2 reactions, which may influence NO production through their effect on radical recombination, were compared.