A comparison between weighted sum of gray gases and statistical narrow-band radiation models for combustion applications

Journal Article · Sun May 01 00:00:00 EDT 1994 · Combustion and Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(94)90007-8· OSTI ID:7184982

Soufiani, A ^[1]; Djavdan, E ^[2]

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1. Ecole Centrale Paris, Chatenay-Malabry (France). Lab. d'Energetique Moleculaire et Macroscopique
2. Centre de Recherche Claude-Delorme, Jouy-en-Josas (France)

The weighted sum of gray gases (WSGG) and the statistical narrow-band (SNB) models are implemented for radiative transfer calculations in realistic combustion gas mixtures and their results are compared. The WSGG model parameters are generated from SNB emissivity calculations in the [300, 2500 K] temperature range for a partial pressure ratio p[sub w]/p[sub c] = 2. In addition, the same methods are used for the resolution of the transfer equation associated with both models. Comparisons are made for the cases of planar geometry and an axisymmetrical methane--oxygen furnace. When the gas mixture is practically isothermal and surrounded by cold walls, small errors are introduced by the use of the WSGG model. On the other hand, in the case of significant temperature gradients, the inaccurate representation of gas absorptivities by the WSGG model leads to important errors.

• OSTI ID: 7184982
• Journal Information: Combustion and Flame; (United States), Journal Name: Combustion and Flame; (United States) Vol. 97:2; ISSN CBFMAO; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
034000 -- Natural Gas-- Combustion
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ALKANES
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
COMPARATIVE EVALUATIONS
ENERGY TRANSFER
EVALUATION
FURNACES
GAS FURNACES
HEAT TRANSFER
HYDROCARBONS
KINETICS
MATHEMATICAL MODELS
METHANE
ORGANIC COMPOUNDS
RADIANT HEAT TRANSFER
REACTION KINETICS