Results 261 to 270 of about 139,572 (294)
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Dynamics in a Rod Model of Solid Flame Waves
SIAM Journal on Applied Mathematics, 2004Summary: We consider gasless solid fuel combustion in a cylinder of radius \(\tilde{R}\), associated with the SHS (self-propagating high-temperature synthesis) process, which employs combustion waves to synthesize materials. A powder mixture of reactants is cold pressed into a sample, typically a cylinder, and ignited at one end.
J. H. Park +2 more
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Dynamical Aspects of Pulsed Flames
Combustion Science and Technology, 1996Abstract A one-dimensional model for the so-called pulsed flames, which are employed for molecular detection and in some combustion related measurements, is formulated and studied numerically. It is shown that the pulsed flame is in fact a highly nonlinear realization of the classical oscillatory instability of the anchored flame.
I. BRAILOVSKY +2 more
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1984
Let us consider the motion of flame fronts in flows that can be unsteady and non-uniform. When the length and time scales of the initial flow are larger than those associated with the planar flame (the flame thickness d and the transit time d/uo where uo is the laminar flame speed), the flame front can be considered, in first approximation, as a ...
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Let us consider the motion of flame fronts in flows that can be unsteady and non-uniform. When the length and time scales of the initial flow are larger than those associated with the planar flame (the flame thickness d and the transit time d/uo where uo is the laminar flame speed), the flame front can be considered, in first approximation, as a ...
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Dynamic analysis of oscillating flames
2009Abstract Turbulent diffusion flames are inherently complex due to the coupling of highly nonlinear chemical kinetics and turbulence. In order to understand this interdependency of transport and kinetic mechanisms, acoustically forced flames are useful because they exhibit a larger range of combustion conditions than those observed in steady flames. A
CUOCI, ALBERTO +3 more
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Physics of Fluids, 2019
This article deals with the dynamics of a cylindrical bluff-body-stabilized M-shaped premixed flame at low flow rates. A comparative analysis with classical conical flames was performed. The velocities and flame front field dynamics were studied with the use of numerical methods.
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This article deals with the dynamics of a cylindrical bluff-body-stabilized M-shaped premixed flame at low flow rates. A comparative analysis with classical conical flames was performed. The velocities and flame front field dynamics were studied with the use of numerical methods.
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On the intrinsic dynamics of premixed flames
Philosophical Transactions of the Royal Society of London. Series A: Physical and Engineering Sciences, 1990Abstract A brief account of the structure and dynamics of freely propagating premixed gas flames in the regime of spontaneous flame instability is given. Recent theoretical studies providing a reduction of the pertinent free-boundary problem to a single evolution equation for the flame interface are discussed.
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Flame Leading Edge and Flow Dynamics in a Swirling, Lifted Flame
Volume 2: Combustion, Fuels and Emissions, Parts A and B, 2012Flames in high swirl flow fields with vortex breakdown often stabilize aerodynamically in front of interior flow stagnation points. In contrast to shear layer stabilized flames with a nearly fixed, well defined flame attachment point, the leading edge of aerodynamically stabilized flames can move around substantially, due to both the inherent dynamics ...
Michael Malanoski +5 more
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Dynamics and stability of premixed flames
Physics Reports, 2000Abstract The latest achievements in the theory of premixed flames including both the analytical theory and the numerical simulations are reviewed. Gas dynamics of curved flames and flame-induced flows as well as flames propagating under confinement in closed burning chambers is considered.
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On and the dynamics of turbulent diffusion flames
Fire Safety Journal, 1998Abstract A dimensionless scaling parameter originally derived by Zukoski from analysis of non-reacting turbulent plumes, Q∗, has been applied extensively and successfully in the literature to correlate heights of turbulent diffusion flames. However, from new flame height measurements at laboratory temperature and substantially above and below ...
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The Complex Dynamics of Wrinkled Flames
1990We summarize recent analytical attempts to understand the dynamics of hydrodynamically unstable, hence wrinkled, premixed flames. Exact solutions to qualitatively correct, non-linear evolution equations are displayed, and used as a basis to study the role of large scale geometry in the local flame dynamics.
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