title: Unusual pulsating states in hydrocarbon-oxygen premixed flames.
abstract: An unusual type of pulsating state has been observed using a new ignition protocol for heavy hydrocarbon-oxygen premixed flames on a circular porous plug burner. The shape and motion of these states are quasicircular, luminous, pulsating regions of M (M=1, 2, 3, or 4) lobes that increase in size as the flame propagates outward. As the lobes expand, they break apart near their midpoints and form counterpropagating spiral-like arms. These spiral arms rotate, "collide" with arms generated by adjacent lobes, and are extinguished. We will describe the unusual characteristics of the dynamics of these states.
authors.affiliation: Department of Physics, University of Houston, Houston, Texas 77204-5005, USA.
authors.forename: M
authors.initials: M
authors.lastname: Gorman
authors.forename: S
authors.initials: S
authors.lastname: Perrollier