Prediction of the blowout of jet diffusion flames in a coflowing stream of air

Conference · Sun Dec 31 00:00:00 EST 1995

OSTI ID:163209

Karbasi, M; Wierzba, I ^[1]

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1. Univ. of Calgary, Alberta (Canada). Dept. of Mechanical Engineering

The blowout limits of a lifted diffusion flame in a coflowing stream of air are estimated using a simple model for extinction, for a range of fuels, jet diameters and co-flowing stream velocities. The proposed model uses a parameter which relates to the ratio of a time associated with the mixing processes in a turbulent jet to a characteristic chemical time. The Kolmogorov microscale of time is used as time scale in this model. It is shown that turbulent diffusion flames are quenched by excessive turbulence for a critical value of this parameter. The predicted blowout velocity of diffusion flames obtained using this model is in good agreement with the available experimental data.

• OSTI ID: 163209
• Report Number(s): CONF-950116-; ISBN 0-7918-1289-8; TRN: IM9604%%313
• Resource Relation: Conference: 1995 American Society of Mechanical Engineers (ASME) energy sources technology conference and exhibition, Houston, TX (United States), 29 Jan - 1 Feb 1995; Other Information: PBD: 1995; Related Information: Is Part Of Emerging energy technology 1995. PD-Volume 66; Karim, G.A. [ed.] [Univ. of Calgary, Alberta (Canada)]; PB: 154 p.
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
40 CHEMISTRY
METHANE
COMBUSTION KINETICS
FLAMES
BLOWOFF
LIMITING VALUES
INHIBITION
MATHEMATICAL MODELS
FUEL-AIR RATIO
TURBULENT FLOW
IGNITION