On the structure of nonsooting counterflow ethylene and acetylene diffusion flames

Journal Article · Sun Dec 01 04:00:00 EST 1996 · Combustion and Flame

DOI:https://doi.org/10.1016/S0010-2180(96)00055-7· OSTI ID:413488

Sun, C J; Sung, C J; Wang, H; Law, C K ^[1]

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1. Princeton Univ., NJ (United States). Dept. of Mechanical and Aerospace Engineering

The structures of ethylene/oxygen/nitrogen and acetylene/oxygen/nitrogen diffusion flames in the counterflow configuration were investigated experimentally and computationally. The temperature and major species concentration profiles were measured with spontaneous Raman scattering. The experimental situations were computationally simulated with detailed reaction mechanisms and transport properties. The kinetic mechanism was based on GRI-Mech, with modifications to predict more closely the adiabatic flame speeds of ethylene/air and acetylene/air mixtures, and with additional description of higher hydrocarbon formation and oxidation up to C{sub 6} species. The numerical predictions were found to be in reasonably good agreement with the experiment. Both experimental and computational results indicate that acetylene is the major intermediate species in the ethylene flame, having a significant influence on the heat release, overall fuel destruction, and molecular mass growth. The reaction pathways leading to benzene formation in these flames were examined computationally, with the goal of achieving a better understanding of soot nucleation in diffusion flames.

• OSTI ID: 413488
• Journal Information: Combustion and Flame, Journal Name: Combustion and Flame Journal Issue: 4 Vol. 107; ISSN CBFMAO; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
ACETYLENE
AIR POLLUTION CONTROL
COMBUSTION KINETICS
ETHYLENE
FLAMES
GAS ANALYSIS
MATHEMATICAL MODELS
MORPHOLOGY
SOOT
TEMPERATURE DISTRIBUTION