Strategy for the simplification of nitric oxide chemistry in a laminar methane/air diffusion flamelet
- George Washington Univ., Washington, DC (United States). Dept. of Chemistry
A reduction of two detailed kinetic mechanisms for nitrogen oxidation, GRI-Mech 2.11 and Drake and Blint, is presented which uses the conserved scalar description of species transport. Profiles of C/H/O species, temperature, and scalar dissipation rate as functions of mixture fraction are required as model inputs. Reaction rate analysis of the nitrogen chemistry is used to identify steady state relationships and pare insignificant reactions. The resultant skeletal mechanism is used to identify steady state relationships and pare insignificant reactions. The resultant skeletal mechanism for nitrogen chemistry can be recast as a closed set of five linear species conservation equations for NH{sub 3}, HNCO, HCNO, HCN, and NO. The concentrations of nine other intermediates (HOCN, CN, NCO, NH, NHG{sub 2}, HNO, N, NO{sub 2}, and N{sub 2}O) may be obtained through steady-state relationships. Validation of the reduced mechanisms is accomplished through comparison with the parent detailed mechanisms. Of particular significance is the dominance of the reaction HCCO + NO {yields} HCNO + CO in NO reburn chemistry in one of the detailed mechanisms investigated (GRI-Mech 2.11) and its derived reduced mechanism.
- Sponsoring Organization:
- National Inst. of Standards and Technology, Gaithersburg, MD (United States); Gas Research Inst., Chicago, IL (United States)
- OSTI ID:
- 543506
- Journal Information:
- Combustion and Flame, Journal Name: Combustion and Flame Journal Issue: 3 Vol. 111; ISSN CBFMAO; ISSN 0010-2180
- Country of Publication:
- United States
- Language:
- English
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