Results 241 to 250 of about 46,903 (297)

Physical Mechanism of Ultrafast Flame Acceleration

Physical Review Letters, 2008
We explain the physical mechanism of ultrafast flame acceleration in obstructed channels used in modern experiments on detonation triggering. It is demonstrated that delayed burning between the obstacles creates a powerful jetflow, driving the acceleration. This mechanism is much stronger than the classical Shelkin scenario of flame acceleration due to
Vitaly, Bychkov, Damir, Valiev, Lars-Erik, Eriksson   +2 more
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Convergence Acceleration for Steady Flame Computations

Journal of Computational Physics, 2000
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Cuenot, B., Angelberger, C., Legier, J.-P.   +2 more
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Turbulent and accelerating dust flames

Symposium (International) on Combustion, 1985
Industrial dust explosions kill and severely injure workers as well as destroy property. While the hazards of gaseous explosions are well recognized, the same degree of care has not been exercised with regard to combustible dust. The agricultural industry has been especially plagued by this problem.
C.W. Kauffman, S.R. Srinath, F.I. Tezok, J.A. Nicholls, M. Sichel   +4 more
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Investigation of Flame Regimes for Flame Acceleration to Detonation

2018 Joint Propulsion Conference, 2018
Expanding hydrogen-air flames are studied in a semi-confined duct with an optical access test section. The focus of the work is to characterize the regimes of flame development in a highly turbulent environment and observe the Deflagration-to-Detonation (DDT) phenomenon.
Chambers, Jessica M., Ahmed, Kareem A.
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Flame morphology and self-acceleration of syngas spherically expanding flames

International Journal of Hydrogen Energy, 2018
Abstract The self-acceleration of spherically expanding flames were investigated using a constant volume combustion chamber for CO/H2/O2/N2 mixtures over a wide range of initial pressure from 0.2 to 0.6 MPa, CO/H2 ratio from 50/50 to 10/90 and equivalence ratio from 0.4 to 1.5.
Xiao Cai, Jinhua Wang, Haoran Zhao, Meng Zhang, Zuohua Huang   +4 more
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New Acceleration Techniques at INFN with FLAME

AIP Conference Proceedings, 2010
INFN, in the frame of the Strategic Project PLASMONX, is developing New Acceleration Techniques based on Laser Produced Plasmas. The activity is carried out jointly with CNR and a few Italian Universities. The first results obtained in a collaborating small‐scale laboratory (ILIL‐CNR) aim to optimize the physical conditions and related diagnostics for ...
Danilo Giulietti, Dan Dumitras
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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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Accelerating flames in tubes—an analysis

Proceedings of the Combustion Institute, 2007
Abstract Flame acceleration in tubes is studied. A tube filled with flammable mixture is closed at one end and open to the atmosphere at its second end. When ignition takes place near the closed end, it is well-known from experiments that the flame may accelerate, oscillate and eventually reach considerable speeds.
C. Regis L. Bauwens, Luc Bauwens, Ida Wierzba   +2 more
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Gas-flame acceleration regimes within tubes

Combustion, Explosion, and Shock Waves, 1987
The authors consider modeling of propagation of an accelerating flame upon ignition of a gas mixture at the closed end of a tube. The calculations performed used the turbulent combustion model based on an equation for the concentration probability distribution density (PDD). The equation was tested for the simpler problem of ignition and propagation of
M. A. Andreev, A. M. Stepanov
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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
openaire   +1 more source