Results 261 to 270 of about 47,191 (297)

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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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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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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Flame acceleration due to flame-induced instabilities in large-scale explosions

Combustion and Flame, 2001
Large-scale explosions of initially quiescent methane-air and propane-air mixtures at atmospheric pressure are reported, in which the flame speed of a hemispherical flame is measured up to radii just beyond 3 m. A cellular flame is developed fairly soon and thereafter the flame speed increases continually with the square root of the time.
D. Bradley, T.M. Cresswell, J.S. Puttock
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Ignition and Flame Studies for an Accelerating Transonic Mixing Layer

Journal of Propulsion and Power, 2000
Numerical solutions have been obtained for a diffusion e ame in the two-dimensional, laminar, steady, viscous, multicomponent, compressible mixing layer in the presence of a pressure gradient by using the boundary-layer approximationsand solvingthe x-momentum,energy,and speciesconservation equations.
X. Fang, F. Liu, W. Sirignano
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Flame acceleration and DDT in gas explosions

Journal de Physique IV (Proceedings), 2002
A qualitative description of flame acceleration (FA) process is presented, which shows a complexity of the processes that can follow a weak ignition in a combustible mixture. Considering the exclusive role of the confinement and obstructions, the main focus is made on the processes of FA and DDT typical for areas with strong confinement and heavy ...
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Flame acceleration and explosion safety applications

Proceedings of the Combustion Institute, 2011
Abstract Accidental explosions of flammable gases and reactive gas mixtures remain a significant concern in process industries. The present paper reviews the basic mechanism of Flame Acceleration (FA), the results of recent studies on FA, and their application to explosion safety.
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Flame Acceleration and DDT in a Torus Geometry

2017
A series of combustion experiments in an optically transparent annular channel were carried out with hydrogenoxygen mixtures from 15 to 85 vol.% H2. The complex formed by an oblique shock wave and a subsonic deflagration, only recently observed by the authors in an annular channel is investigated.
Kuznetsov, M., Lelyakin, A., Grune, J.
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