A laminar vortex interacting with a premixed flame; Measured formation of pockets of reactants

Journal Article · Sun Dec 01 04:00:00 EST 1991 · Combustion and Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(91)90111-N· OSTI ID:5327360

Roberts, W L; Driscoll, J F ^[1]

---

1. Dept. of Aerospace Engineering, Univ. of Michigan, Ann Arbor, MI (US)

This paper reports that a single toroidal, laminar vortex is created and a laminar premixed flame is propagated over the vortex in order to study the fundamental interaction process and to compare results with the numerical solutions of the Navier-Stokes equations obtained by Poinsot, Veynante, and Candel. Results quantify the degree of flame rollup, the flame perimeter increase due to wrinkling, the minimum vortex size that wrinkles the flame, and the boundary of the pocket formation (corrugated flame) regime. The measured trends indicate that viscous attentuation of the vortex by the hot, viscous products is important. The importance of flame stretch is verified; as Lewis number is varied it is found that in order to form pockets, diffusionally stable flames require a vortex strength that is three times larger than that required by the diffusionally unstable flames.

• OSTI ID: 5327360
• Journal Information: Combustion and Flame; (United States), Journal Name: Combustion and Flame; (United States) Vol. 87:3; ISSN CBFMA; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
DIFFERENTIAL EQUATIONS
EQUATIONS
FLAMES
FLUID FLOW
LAMINAR FLOW
NAVIER-STOKES EQUATIONS
PARTIAL DIFFERENTIAL EQUATIONS
VORTEX FLOW