Flamelet structure of radiating CH{sub 4}-air flames

Journal Article · Fri Sep 01 04:00:00 UTC 1995 · Combustion and Flame

DOI:https://doi.org/10.1016/0010-2180(95)00037-7· OSTI ID:116445

Chan, S H; Pan, X C; Abou-Ellail, M M.M. ^[1]

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1. Univ. of Wisconsin, Milwaukee, WI (United States). Dept. of Mechanical Engineering

The structure of radiating laminar flamelets of CH{sub 4}-air diffusion flames is presented. Radiative heat transfer effects are examined by using the optically thin and full radiation models. The predictions are based on the solution of a one-dimensional set of conservation equations with the mixture fraction, f, as the independent variable for different fixed values of the scalar dissipation rate, {chi} until extinction of the flamelet eventually occurs. Both the adiabatic flamelet and nonadiabatic flamelet with radiative heat loss are studied and their respective flamelet structures are presented. Good agreement is obtained with limited experimental data available. Also, the effects of thermal radiation on NO formation in the flamelet has been investigated. Due to the sensitivity of thermal NO kinetics to temperature, thermal radiation is found to have a profound effect on thermal NO formation, practically at all ranges of {chi} except near the extinction point where flamelets are excessively stretched.

• OSTI ID: 116445
• Journal Information: Combustion and Flame, Journal Name: Combustion and Flame Journal Issue: 4 Vol. 102; ISSN CBFMAO; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
CHEMICAL REACTION YIELD
COMBUSTION KINETICS
FLAMES
HEAT LOSSES
INHIBITION
LAMINAR FLOW
MATHEMATICAL MODELS
METHANE
MORPHOLOGY
NITRIC OXIDE
ONE-DIMENSIONAL CALCULATIONS
RADIANT HEAT TRANSFER