Results 221 to 230 of about 5,196 (262)

Acceleration of a flame by flame- vortex interactions

Combustion and Flame, 1990
The acceleration of a premixed flame propagating in a planar channel past stationary obstacles is investigated using a computer model based on combining the discrete vortex method with a flame interface algorithm. Results presented in this article show that the initial acceleration of the flame is caused by the sudden contraction of the flow due to the
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Role of compressibility in moderating flame acceleration in tubes

Physical Review E, 2010
The effect of gas compression on spontaneous flame acceleration leading to deflagration-to-detonation transition is studied theoretically for small Reynolds number flame propagation from the closed end of a tube. The theory assumes weak compressibility through expansion in small Mach number.
Vitaly, Bychkov, V'yacheslav, Akkerman, Damir, Valiev, Chung K, Law   +3 more
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Self-acceleration of nuclear flames in supernovae

Space Science Reviews, 1995
The speed of the laminar flame in a degenerate carbon-oxygen white dwarf is too slow to produce a Type I supernova. We draw attention to the role of the Landau instability in wrinkling the flame front. This roughening of the front surface can cause an appreciable enhancement in the flame velocity.
S. I. Blinnikov, P. V. Sasorov, S. E. Woosley   +2 more
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Model of accelerating coal dust flames

Combustion and Flame, 1985
Abstract A model describing turbulent coal dust flame propagation and accelaration is based on the transient, macroscopic equations of change. The turbulent flame velocity was obtained from a simple correlative technique combining turbulence and chemical effects. Predictions indicate that a deflegrating coal dust flame can accelerate to high velocity
Dwight P. Clark, L.Douglas Smoot
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The acceleration of flame propagation in a tube by an obstacle

Combustion and Flame, 1991
Abstract A quantitative determination was made of the effect of a single baffle of on the characteristics of gas explosions in a 76-mm-diameter closed vessel of large length to diameter ratio ( L D = 21.6 ). Mixtures of methane-air were predominantly used, but other gases were also investigated.
H. Phylaktou, G.E. Andrews
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Accelerated flames and detonation in gases

Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1958
Abstract The dynamics of accelerated flames in gases, and the transition to detonation are considered. It is shown that in the pre-detonation stage of an accelerated flame there is a fall in pressure and density behind the flame front, and that there the gas velocity is in the opposite direction to the motion of the flame.
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Initial flame acceleration in an explosive gas

Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1962
Abstract The paper is concerned with pressure waves generated by a flame during the initial phase of its acceleration in a detonation tube filled with a stoichiometric hydrogen + oxygen mixture. The process was observed by means of streak schlieren photography with simultaneous pressure measurements at several stations in the tube ...
A. J. Laderman, A. K. Oppenheim
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A Mechanism for Flame Acceleration in Narrow Tubes

AIAA Journal, 2003
A simple approachto controlthe vonKarman vortexstreet behind a two-dimensionalcircular cylinderbased on the proportional feedback of the estimate of just the Ž rst POD mode has been developed. A stabilityanalysisof this control lawwas conductedafter linearization about the desired equilibriumpoint (origin) and conditions for controllabilityand ...
James D. Ott, Elaine S. Oran, John D. Anderson   +2 more
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Knock: Flame acceleration or spontaneous ignition?

Combustion and Flame, 1968
There is no general agreement on the precise mechanism by which knock occurs; contrasting theories attribute the phenomenon to extremely rapid flame propagation or to the spontaneous ignition of the end gas. Experiments designed to resolve this question have been made with a rapid compression machine.
W.S. Affleck, A. Fish
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An Investigation on the Flame Acceleration of Oxygen Enriched Ethylene Flames

AIAA AVIATION 2022 Forum, 2022
Rachel Hytovick, Taylor R. Brown, Robert F. Burke, Taha Rezzag, Kareem A. Ahmed   +4 more
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