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The cylindrical stretched flame
Combustion and Flame, 1984For sufficiently cool remote gases, the cylindrical stretched flame shows classical ignition-extinction behavior. For remote gas temperatures close to the adiabatic flame temperature, the flame response is qualitatively different, with negative flame speed solutions which may be physically accessible.
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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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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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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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A generalization of the Thickened Flame model for stretched flames
Combustion and Flame, 2023The Thickened Flame (TF) model is a widely used approach for Large Eddy Simulation of premixed flames. It is based on a “mapping” transformation where all diffusivities are multiplied by a thickening factor F while reaction terms are divided by F. Theory shows and 1D flame simulations confirm that this mapping preserves the unstretched laminar flame ...
Detomaso, Nicola +4 more
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Stretch rate of tubular premixed flames
Combustion and Flame, 2006Abstract Following Seshadri and Williams solution describing the flow field for the opposed jet burner, the analytical solution is given for the flow field of two other burners: the opposed tubular burner and the tubular burner. Under plug flow boundary conditions, it is shown that the stretch rate at the stagnation surface of the opposed tubular ...
Peiyong Wang +2 more
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Burning velocity of stretched flames
2008Application d'un modele superficiel de flammes.
Tadao Takeno +2 more
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On the stability of stretched flames
Combustion Theory and Modelling, 1997It is shown that the well known difficulty concerning the unconditional stability of a planar flame sustained in a stagnation-point flow is due to the infinite aspect length scale of the system. In finite geometries occurring in numerical and laboratory experiments the flame may well become unstable provided the flow-induced stretch is weak enough.
Y. Kortsarts +3 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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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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