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Atomization and Sprays
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ISSN Druckformat: 1044-5110
ISSN Online: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.2012005452
pages 333-349

EFFECT OF A FUEL SPRAY ON EDGE FLAME PROPAGATION

J. Barry Greenberg
Faculty of Aerospace Engineering, Technion-Israel Institute of Technology, Haifa, 32000, Israel
Leonid S. Kagan
Sackler Faculty of Exact Sciences, School of Mathematical Sciences, Tel Aviv University, Israel
G. I. Sivashinsky
Sackler Faculty of Exact Sciences, School of Mathematical Sciences, Tel Aviv University, Israel

ABSTRAKT

In this paper, results of numerical simulations of edge flame propagation in the presence of a spray of liquid droplets in a three-dimensional channel are presented for the first time. The fuel vapor and droplets and gaseous oxidizer are supplied in a counterflow. Attention is focused on the way the spray-related parameters (initial droplet load and the vaporization Damköhler number) impact on the ignition and extinction fronts in the strained opposed flow mixing layer. Unlike similar studies of purely gaseous flames in the same configuration, hysteresis is found to occur here under certain operating conditions. This indicates how the local thermal and chemical distributions that develop upon applying a source of ignition play such a critical part in determining whether ignition will occur.

SCHLÜSSELWÖRTER: edge flame, fuel spray, hysteresis

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