Analysis and modeling of nitrous oxide chemistry in lean, premixed combustion

Journal Article · Sat Dec 01 04:00:00 EST 1990 · Combustion and Flame; (USA)

DOI:https://doi.org/10.1016/0010-2180(90)90005-C· OSTI ID:5939828

Martin, R J; Brown, N J ^[1]

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1. Applied Science Div., Lawrence Berkeley Lab., Berkeley, CA (US)

A modeling study of N{sub 2}O chemistry in lean, premixed, atmospheric-pressure combustion is presented. Laminar flame and homogeneous combustion modeling calculations were performed using the PREMIX and CHEMKIN codes, respectively. Four systems containing H{sub 2}, O{sub 2}, Ar, and an N-containing dopant (NH{sub 3}, NO, or N{sub 2}O) were modeled and compared to recent flat-flame burner experiments. Agreement between measured and computed N{sub 2}O, NO, and N{sub 2} concentration profiles indicated that the model is a reasonable representation of the chemistry and transport in the flame system. The effects of assumed burner temperature, temperature profile shape, mass diffusion, and probing are investigated. A sensitivity analysis of the flame calculations is presented. For cases where burner temperatures were identical but temperatures were either determined by solving the energy equation numerically or were specified to be equivalent to measured temperatures, calculated N{sub 2}O, NO, and N{sub 2} profiles differed by 2%-15%. Calculations that differed only in specified flameholder surface temperature (400-1000 K) produced concentration profiles that varied by approximately 20% in NO and N{sub 2} and by as much as a factor of 7 in N{sub 2}O.

• OSTI ID: 5939828
• Journal Information: Combustion and Flame; (USA), Journal Name: Combustion and Flame; (USA) Vol. 82:3-4; ISSN CBFMA; ISSN 0010-2180
• Country of Publication: United States
• Language: English

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