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Dioxin formation in stretched flames
Chemosphere, 1992Numerical simulations of stretched laminar twin premixed flames are carried out in order to understand the gasphase formation of dioxins in situations analogous to the post combustor and following regions of a typical incinerator. A previously developed chemical kinetic mechanism, that describes dioxin formation in terms of some generic species, is ...
Murali Avula, Ishwar K. Puri
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Stretch and Curvature Effects on Flames
42nd AIAA Aerospace Sciences Meeting and Exhibit, 2004To understand how curvature affects the properties of stretched premixed flames including flame temperature, flame speed, and extinction, comparisons among the tubular premixed flame, the opposed jet flame and the one-dimensional planar flame are drawn physically, experimentally and numerically.
Peiyong Wang +3 more
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Symposium (International) on Combustion, 1989
Recent advances in the understanding of the structure, propagation, and extinction of laminar flames under the influence of stretch, as manifested by the existence of flame curvature, flow nonuniformity, and flame motion, are reviewed. The emphasis is on premixed flames because of the richness and subtlety of the phenomena involved.
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Recent advances in the understanding of the structure, propagation, and extinction of laminar flames under the influence of stretch, as manifested by the existence of flame curvature, flow nonuniformity, and flame motion, are reviewed. The emphasis is on premixed flames because of the richness and subtlety of the phenomena involved.
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On Hydrodynamic Instability of Stretched Flames
Combustion Science and Technology, 1997Abstract The recent result on the diffusive instability of a planar premixed gas flame sustained in the stagnation-point flow are carried over on the hydrodynamic (Darrieus-Landau) instability. Similar to the former case the planar flame of the infinite aspect length-scale is unconditionally stable for any flow induced stretch however small.
Y. Kortsarts +2 more
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An invariant derivation of flame stretch
Combustion and Flame, 1984The flame stretch factor is derived using an invariant formulation in a consistent manner. The derived generalized expression has two terms and completely describes the flame area evolution with its movement. One term represents the stretch due to the nonuniform tangential velocity field and the other represents the effect of the curvature of the ...
S.H. Chung, C.K. Law
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Burning velocity of stretched flames
2008Application d'un modele superficiel de flammes.
Tadao Takeno +2 more
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Contribution of curvature to flame-stretch effects on premixed flames
Combustion and Flame, 2001Abstract This experimental investigation considers steady two-dimensional rich and lean premixed methane–air flames established in two configurations, one a two-dimensional slot burner and the other an axisymmetric coannular burner. The flames contain a curved premixed reaction zone that has a tip.
Chun W. Choi, Ishwar K. Puri
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Flame/stretch interactions in laminar and turbulent premixed flames
Combustion Science and Technology, 2002The flame/stretch interactions of laminar and turbulent premixed flames are considered both experimentally and computationally. Potentially strong effects of flame/stretch interactions due to preferential-diffusion phenomena within practical turbulent premixed flames were suggested by experiments and numerical simulations of spherical outwardly ...
Aung, KT +5 more
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Flame stretch analysis in diffusion flames with inert gas
Journal of Thermal Science, 2001Experimental investigations of impinging flame with fuel mixed with non-reaction gas were conducted. According to the observations of combustion test and temperature measurement, the non-reaction gas might dilute the local concentration of fuel in the diffusion process. The shape of the flame was symmetrical due to the flame stretch force. Results show
Ay Su, Ying-Chieh Liu
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Stretched spherical cap flames
Combustion and Flame, 1986Abstract Convex spherical cap flames with negative flame stretch and concave spherical cap flames with positive flame stretch are analyzed using activation energy asymptotics. A minimum flame radius is calculated for concave flames and this results is favorably compared with experimental data on quenching diameters.
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