On flame holes and local extinction in lifted-jet diffusion flames

Journal Article · Mon Aug 01 04:00:00 EDT 2005 · Combustion and Flame

DOI:https://doi.org/10.1016/j.combustflame.2005.04.006· OSTI ID:20677694

Lyons, K M ^[1]; Watson, K A ^[2]; Carter, C D; Donbar, J M ^[3]

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1. Department of Mechanical and Aerospace Engineering, North Carolina State University, Box 7910, Raleigh, NC 27695-7910 (United States)
2. Department of Mechanical Engineering, University of the Pacific, Stockton, CA 95211 (United States)
3. Air Force Research Laboratory, AFRL/PRA, Wright-Patterson Air Force Base, OH 45433 (United States)

This paper reports observations of local extinction events characterized by flame holes in the CH profiles that have been gathered during a simultaneous sequential CH planar laser-induced fluorescence (PLIF) and particle image velocimetry (PIV) investigation of a lifted methane-air diffusion flame. Flame bulges are also reported - that are thought to precede extinction events - as well as ''pinched'' regions upstream of the flame bulges. This information is of use to modelers regarding structures interacting with the reaction zone. It is also relevant to those analyzing and modeling breaks in the reaction zones in studies of flame holes and edge flames.

• OSTI ID: 20677694
• Journal Information: Combustion and Flame, Journal Name: Combustion and Flame Journal Issue: 3 Vol. 142; ISSN CBFMAO; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
AIR
COMBUSTION KINETICS
FLAMES
METHANE