Flame propagation through periodic vortices

Journal Article · Wed Feb 01 00:00:00 EST 1995 · Combustion and Flame

DOI:https://doi.org/10.1016/0010-2180(94)00161-K· OSTI ID:28053

Dold, J W; Kerr, O S ^[1]; Nikolova, I P ^[2]

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1. Univ. of Bristol (United Kingdom). School of Mathematics
2. Inst. of Mechanics and Biomechanics, Sofia (Bulgaria)

The discovery of a new class of Navier-Stokes solutions representing steady periodic stretched vortices offers a useful test-bed for examining interactions between flames and complex flow-fields. After briefly describing these vortex solutions and their wide-ranging parameterization in terms of wavelength and amplitude, this article examines their effect on flames of constant normal propagation speed as observed through numerical solutions of an eikonal equation. Over certain ranges of vortex amplitude and flame-speed, a corridor of enhanced flame passage is seen to be created as a leading flame-tip managers to leap-frog between successive vortices. However, for large enough amplitudes of vorticity or small enough flame-speeds, the flame fails to be able to benefit from the advection due to the vortices. It is shown that the leading tips of such flames are effectively trapped by the stretched vortices.

• OSTI ID: 28053
• Report Number(s): CONF-940711-; ISSN 0010-2180; TRN: IM9516%%179
• Journal Information: Combustion and Flame, Vol. 100, Issue 3; Conference: 25. international symposium on combustion, Irvine, CA (United States), 31 Jul - 5 Aug 1994; Other Information: PBD: Feb 1995
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
FLAME PROPAGATION
FLOW MODELS
VORTEX FLOW
FLAMES
FLUID MECHANICS
TURBULENT FLOW