Comparisons with respect to the sooting tendency are made between stationary diffusion flames and diffusion flames with pulsations induced by oscillating fuel flow. Time-resolved measurements of the soot particle properties in the flames are obtained by combining Rayleigh-scattering, laser-induced incandescence, and extinction measurements into the RAYLIX method. Furthermore, flame luminosity at 590 nm and OH*-chemoluminescence signals at 310 nm are monitored to obtain data regarding the flame structure. Mean soot volume fractions of oscillating flames are significantly different from those of stationary flames with the same mean fuel flow rate; oscillations of the total amount of soot are phase shifted and asymmetric compared with fuel flow oscillations.
© 2005 Optical Society of America
Original Manuscript: February 2, 2005
Revised Manuscript: May 11, 2005
Manuscript Accepted: May 13, 2005
Published: November 1, 2005
Janbernd Hentschel, Rainer Suntz, and Henning Bockhorn, "Soot formation and oxidation in oscillating methane–air diffusion flames at elevated pressure," Appl. Opt. 44, 6673-6681 (2005)