Dynamics of premixed hydrogen/air flames in mesoscale channels

Journal Article · Wed Oct 15 00:00:00 EDT 2008 · Combustion and Flame

DOI:https://doi.org/10.1016/J.COMBUSTFLAME.2008.08.006· OSTI ID:21116096

Pizza, Gianmarco ^[1]; Frouzakis, Christos E; Boulouchos, Konstantinos ^[2]; Mantzaras, John ^[1]; Tomboulides, Ananias G ^[3]

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1. Paul Scherrer Institute, Combustion Research, CH-5232, Villigen PSI (Switzerland)
2. Aerothermochemistry and Combustion Systems Laboratory, Swiss Federal Institute of Technology, CH-8092, Zurich (Switzerland)
3. Department of Engineering and Management of Energy Resources, University of Western Macedonia, 50100 Kozani (Greece)

Direct numerical simulation with detailed chemistry and transport is used to study the stabilization and dynamics of lean ({phi}=0.5) premixed hydrogen/air atmospheric pressure flames in mesoscale planar channels. Channel heights of h=2, 4, and 7 mm, and inflow velocities in the range 0.3{<=}U{sub IN}{<=}1100cm/ s are investigated. Six different burning modes are identified: mild combustion, ignition/extinction, closed steady symmetric flames, open steady symmetric flames, oscillating and, finally, asymmetric flames. Chaotic behavior of cellular flame structures is observed for certain values of U{sub IN}. Stability maps delineating the regions of the different flame types are finally constructed. (author)

• OSTI ID: 21116096
• Journal Information: Combustion and Flame, Vol. 155, Issue 1-2; Other Information: Elsevier Ltd. All rights reserved; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
08 HYDROGEN
AIR
COMBUSTION KINETICS
HYDROGEN
FLAMES
CHAOS THEORY
DUCTS
ATMOSPHERIC PRESSURE
ASYMMETRY
MAPS
OSCILLATIONS
COMPUTERIZED SIMULATION
STABILITY
STABILIZATION
VELOCITY
Premixed flames
Flame instabilities
Spatiotemporal oscillations