Flame stretch measurements during the interaction of premixed flames and Karman vortex streets using PIV

Journal Article · Mon Apr 01 04:00:00 EST 1996 · Combustion and Flame

DOI:https://doi.org/10.1016/0010-2180(95)00186-7· OSTI ID:215676

Nye, D A; Lee, J G; Lee, T W; Santavicca, D A ^[1]

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1. Pennsylvania State Univ., University Park, PA (United States)

Flame stretch measurements in a premixed, lean methane-air, V-flame interacting with a Karman vortex street have been made using a particle image velocimeters. The flame curvature and strain rate along the flame have been measured over the range of {minus}2.0--1.0 mm{sup {minus}1} and {minus}175--170 s{sup {minus}1}, respectively, which corresponds to a range of flame stretch from {minus}475--200 s{sup {minus}1}. Results indicate that the curvature and strain rate are statistically independent. Flame stretch statistics based on individual flames are also considered since each flame represents a particular phase within the regular and periodic interaction cycle studied. These results indicate that for a particular flame the average stretch rate becomes independent of the average flame strain rate. A comparison among PIV measurements, OH Planar laser-induced fluorescence (OH-PLIF) measurements, and numerical simulation reveals similar flame stretch statistics. Qualitative measurements concerning flame shape and the relative location of vortices within the reactant flow are also discussed.

• OSTI ID: 215676
• Journal Information: Combustion and Flame, Journal Name: Combustion and Flame Journal Issue: 1-2 Vol. 105; ISSN CBFMAO; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
COMBUSTION KINETICS
FLAMES
HYDROXYL RADICALS
MATHEMATICAL MODELS
METHANE
MORPHOLOGY
TURBULENT FLOW
VORTEX FLOW