Scalar and velocity field measurements in a lifted CH4-Air diffusion flame

Experimental techniques for simultaneous particle image velocimetry (PIV)/CH planar laser-induced fluorescence (PLIF) and CH/OH-PLIF measurements are described, and results from an investigation of a lifted methane jet diffusion flame are presented. The joint PIV/CH-PLIF measurements suggest that th...

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Bibliographic Details
Published in:Combustion and flame 1999-04, Vol.117 (1-2), p.257-271
Main Authors: WATSON, K. A, LYONS, K. M, DONBAR, J. M, CARTER, C. D
Format: Article
Language:English
Subjects:
Applied sciences
Combustion of gaseous fuels
Combustion. Flame
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Theoretical studies. Data and constants. Metering
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Summary:Experimental techniques for simultaneous particle image velocimetry (PIV)/CH planar laser-induced fluorescence (PLIF) and CH/OH-PLIF measurements are described, and results from an investigation of a lifted methane jet diffusion flame are presented. The joint PIV/CH-PLIF measurements suggest that the flame stabilizes in a region of relatively low velocity that is near the premixed laminar burning velocity. The turbulent flame appears to be stabilized in a premixed region. Several large-scale vortices are indicated by the velocity fields that probably represent the most influential mechanism for loal extinction of jet diffusion flames. The location of these structures coupled with the CH fluorescence - which effectively marks the flame front - provides an excellent means of establishing patterns responsible for local flame extinction. The remarkably similar response of CH and OH fluorescence signals to the possible radial movement of large-scale structures further emphasizes their role in local flame extinction. (AIAA)
ISSN:0010-2180
1556-2921
DOI:10.1016/S0010-2180(98)00086-8