Flame height measurement of laminar inverse diffusion flames

Journal Article · Sat Jul 15 00:00:00 EDT 2006 · Combustion and Flame

DOI:https://doi.org/10.1016/J.COMBUSTFLAME.2006.04.006· OSTI ID:20829578

Mikofski, Mark A ^[1]; Williams, Timothy C; Shaddix, Christopher R; Blevins, Linda G ^[2]

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1. Microgravity Combustion Laboratory, University of California, Berkeley, CA 94720 (United States)
2. Combustion Research Facility, Sandia National Laboratories, Livermore, CA 94550 (United States)

Flame heights of co-flowing cylindrical ethylene-air and methane-air laminar inverse diffusion flames were measured. The luminous flame height was found to be greater than the height of the reaction zone determined by planar laser-induced fluorescence (PLIF) of hydroxyl radicals (OH) because of luminous soot above the reaction zone. However, the location of the peak luminous signals along the centerline agreed very well with the OH flame height. Flame height predictions using Roper's analysis for circular port burners agreed with measured reaction zone heights when using values for the characteristic diffusion coefficient and/or diffusion temperature somewhat different from those recommended by Roper. The fact that Roper's analysis applies to inverse diffusion flames is evidence that inverse diffusion flames are similar in structure to normal diffusion flames. (author)

• OSTI ID: 20829578
• Journal Information: Combustion and Flame, Vol. 146, Issue 1-2; Other Information: Elsevier Ltd. All rights reserved; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
FLAMES
HEIGHT
ETHYLENE
AIR
METHANE
DIFFUSION
SOOT
HYDROXYL RADICALS