An experimental investigation of the blowout limits of a jet diffusion flame in co-flowing streams of different velocity and composition

Journal Article · Tue Jun 01 04:00:00 EDT 1993 · Journal of Energy Resources Technology; (United States)

DOI:https://doi.org/10.1115/1.2905981· OSTI ID:6346589

Wierzba, I; Kar, K; Karim, G A ^[1]

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1. Univ. of Calgary, Alberta (Canada)

The blowout limits of a methane diffusion flame in a co-flowing air-fuel or air-diluent stream were determined for a range of surrounding co-flow stream velocities, both laminar and turbulent, up to [approximately] 1.50 m/s. Methane, ethylene, propane, and hydrogen were used as the fuels in the surrounding co-flow stream while nitrogen and carbon dioxide were used as diluents. The experimental results show that the velocity of the surrounding stream affects the blowout phenomena significantly. An increase in the stream velocity has a detrimental effect on the blowout limits at very low velocities up to 0.30 m/s (essentially laminar flow) and at velocities higher than 1.50 m/s (turbulent flow). The addition of a fuel to the air stream in most cases enhances the blowout limit of a methane diffusion flame. However, different trends in the variation of the blowout limits with the surrounding fuel concentration were observed, depending on the type of fuel used and on whether the surrounding co-flow stream was laminar or turbulent. The addition of nitrogen or carbon dioxide to the air stream results in decreasing the blowout limits. The effect is more severe at the higher velocities.

• OSTI ID: 6346589
• Journal Information: Journal of Energy Resources Technology; (United States), Journal Name: Journal of Energy Resources Technology; (United States) Vol. 115:2; ISSN 0195-0738; ISSN JERTD2
• Country of Publication: United States
• Language: English

Related Subjects

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03 NATURAL GAS
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08 HYDROGEN
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
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& High-Temperature Chemistry
ALKANES
ALKENES
BLOWOFF
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
DATA
DIFFUSION
ELEMENTS
ETHYLENE
EXPERIMENTAL DATA
FLAMES
FLOW RATE
FLUID FLOW
FUEL-AIR RATIO
HYDROCARBONS
HYDROGEN
INFORMATION
JETS
KINETICS
LAMINAR FLOW
LIMITING VALUES
METHANE
NITROGEN
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PROPANE
REACTION KINETICS
TURBULENT FLOW