The effects of burner geometry and fuel composition on the stability of a jet diffusion flame

Book · Tue Oct 01 04:00:00 EDT 1996

OSTI ID:376311

Papanikolaou, N; Wierzba, I ^[1]

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

The effect of the burner configuration and fuel composition on the stability limits of jet diffusion flames issuing into a co-flowing air stream is presented. Circular and elongated nozzles of various lip thicknesses and aspect ratios were employed with methane as the primary fuel and hydrogen, carbon dioxide and nitrogen as additives. It was found that the effects of the nozzle geometry, fuel composition and co-flowing stream velocity on the blowout limits were highly dependent on the type of flame stabilization mechanism, i.e., whether lifted or rim-attached, just prior to blowout. The blowout behavior of lifted flames did not appear to be significantly affected by a change in the nozzle shape as long as the discharge area remained constant, but it was greatly affected by the fuel composition. In contrast, attached flame stability was influenced by both the fuel composition and the nozzle geometry which had the potential to extend the maximum co-flowing stream velocity without causing the flame to blowout. The parameters affecting the limiting stream velocity were studied.

• OSTI ID: 376311
• Report Number(s): CONF-960154--; ISBN 0-9648731-8-4
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
BLOWOFF
BURNERS
CHEMICAL COMPOSITION
COMBUSTION KINETICS
DESIGN
EXPERIMENTAL DATA
FLAMES
FLOW RATE
FUEL ADDITIVES
NATURAL GAS
NOZZLES
STABILITY