Explanation of the blowoff of inverted flames by the area-increase concept

Structure and stability of premixed flames stabilized behind the trailing edge of a cylindrical rod at low Lewis numbers

“…Among which one can mention the discussions about the stretch effect [2][3][4], the flame area increase due to the strong positive curvature at the base flame [5,6], the heat exchange between the flame and the flame-holder [8,7] and the hydrodynamic straining of the flame base [9,10]. Detailed numerical simulations of a methane-air flame stabilized on a perforated plane have been performed recently in [11,12].…”

Flame Stabilization in a Rear Stagnation Point Flow

“…The experiments of Kawamura et al (1979) bear enough resemblance to the situation analyzed here to justify comparisons between theory and expenment. Certainly there are aspects of the physical situation that are not part of the mathematical model (e.g., flame curvature, variable density, fluid mechanical coupling); but if the ingredients that are incorporated (accelerating flow, heat transfer and diffusion) are the most important physical mechanisms, meaningful comparisons are possible.…”

On Stabilization and Blowoff of Inverted Spherical Flames

“…· 96 I. BRAILOVSKY AND G.1. SIVASHINSK Y A similar instability mechanism is invariably present in the so-called inverted flames stabilized in the wake of a laminar flow past a bluff body, where the flow field is known to converge near the flame base (Lewis and von Elbe, 1961;Kawamura et al, 1979Kawamura et al, , 1982Trevino et al, 1991;Sung et al, 1992).…”

“…Yet, the inverted flames are known to be sustained in purely creeping flows as well (Kawamura et al, 1979(Kawamura et al, , 1982Sung et aI., 1992). This shows that the attached vortices are not of a major importance for the flameholding, at least in laminar regimes.…”