NO emission characteristics of methane-air double flame

Journal Article · Fri Jul 01 04:00:00 EDT 1994 · Combustion and Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(94)90203-8· OSTI ID:7178730

Nishioka, M; Nakagawa, S; Ishikawa, Y; Takeno, T ^[1]

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1. Nagoya Univ. (Japan). Dept. of Mechanical Engineering

NO emission characteristics of methane-air Bunsen-type burner flames were studied numerically in terms of counterflow flame. The flames have the well-known double flame structure: the rich premixed flame to produce CO and H[sub 2] as the main intermediate products and the diffusion flame where the intermediate products burn with surrounding air, and the structure can be simulated by using rich counterflow flame with air. The similarity solution was adopted to describe the flow, temperature, and concentration fields and the detailed kinetics calculation was made by using C[sub 2] chemistry with the all mechanisms leading to NO formation, including thermal and prompt NO mechanisms. The calculation was made as well for thermal mechanism alone, so as to distinguish contribution of the respective NO formation mechanisms in total NO production. The emission characteristics were evaluated quantitatively in terms of the emission index, as compared to the normal premixed and pure diffusion flames. The effects of equivalence ratio and the velocity gradient on the emission index of these flames were studied.

• OSTI ID: 7178730
• Journal Information: Combustion and Flame; (United States), Journal Name: Combustion and Flame; (United States) Vol. 98:1-2; ISSN CBFMAO; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
030700 -- Natural Gas-- Waste Management
034000* -- Natural Gas-- Combustion
ALKANES
APPLIANCES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
COMBUSTION KINETICS
ELEMENTS
EQUIPMENT
GAS APPLIANCES
HYDROCARBONS
HYDROGEN
KINETICS
METHANE
MORPHOLOGY
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
YIELDS