The development of a double flame structure in lifted ethanol spray flames is visualized using OH planar laser-induced fluorescence (PLIF). While the OH images indicate a single reaction zone exists without co-flow, the addition of low-speed co-flow facilitates the formation of a double flame structure that consists of two diverging flame fronts originating at the leading edge of the reaction zone. The outer reaction zone burns steadily in a diffusion mode, and the strained inner flame structure is characterized by both diffusion and partially premixed combustion exhibiting local extinction and re-ignition events.
Combustion Structures in Lifted Ethanol Spray Flames
Contributed by the Fuels and Combustion Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received by the F&C Division October 2002; final revision received February 2003. Associate Editor: S. Gollahalli.
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Marley , S. K., Welle , E. J., and Lyons, K. M. (June 7, 2004). "Combustion Structures in Lifted Ethanol Spray Flames ." ASME. J. Eng. Gas Turbines Power. April 2004; 126(2): 254–257. https://doi.org/10.1115/1.1688768
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