Soot formation and temperature structure in small methane-oxygen diffusion flames at subcritical and supercritical pressures

Journal Article · Tue Jun 15 00:00:00 EDT 2010 · Combustion and Flame

DOI:https://doi.org/10.1016/J.COMBUSTFLAME.2009.11.003· OSTI ID:21318369

Joo, Hyun I; Guelder, Oemer L ^[1]

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1. University of Toronto, Institute for Aerospace Studies, 4925 Dufferin Street, Toronto, Ont. (Canada)

An experimental study was conducted to examine the characteristics of laminar methane-oxygen diffusion flames up to 100 atmospheres. The influence of pressure on soot formation and on the structure of the temperature field was investigated over the pressure range of 10-90 atmospheres in a high-pressure combustion chamber using a non-intrusive, line-of-sight spectral soot emission diagnostic technique. Two distinct zones characterized the appearance of a methane and pure oxygen diffusion flame: an inner luminous zone similar to the methane-air diffusion flames, and an outer diffusion flame zone which is mostly blue. The flame height, marked by the visible soot radiation emission, was reduced by over 50% over the pressure range of 10-100 atmospheres. Between 10 and 40 atmospheres, the soot levels increased with increasing pressure; however, above 40 atmospheres the soot concentrations decreased with increasing pressure. (author)

• OSTI ID: 21318369
• Journal Information: Combustion and Flame, Vol. 157, Issue 6; 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
PRESSURE DEPENDENCE
METHANE
OXYGEN
SOOT
COMBUSTION
LAMINAR FLAMES
DIFFUSION
ATMOSPHERES
AIR
ZONES
EMISSION
HEIGHT
COMBUSTION KINETICS
PRESSURE RANGE MEGA PA 01-10
TEMPERATURE DISTRIBUTION
TEMPERATURE RANGE 1000-4000 K
Supercritical combustion