Results 261 to 270 of about 3,616,071 (302)
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The Journal of Chemical Physics, 1973
The kinetics of the CS2–O2 flame for laser applications is described by a computer program (utilizing 24 contributing reactions) allowing vibrationally excited CO to be created from CS + O. The validity of individual contributing rate coefficients has been established through a comparison with experimental evidence on the oxidation of CS2. [K.
David W. Howgate, T. A. Barr
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The kinetics of the CS2–O2 flame for laser applications is described by a computer program (utilizing 24 contributing reactions) allowing vibrationally excited CO to be created from CS + O. The validity of individual contributing rate coefficients has been established through a comparison with experimental evidence on the oxidation of CS2. [K.
David W. Howgate, T. A. Barr
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Analyzing the dynamics of cellular flames
Physica D: Nonlinear Phenomena, 1996Abstract Video data from experiments on the dynamics of two-dimensional flames are analyzed. The Karhumen-Loeve (KL) analysis is used to identify the dominant spatial structures and their temporal evolution fot several dynamical regimes of the flames. A data analysis procedure to extract and process the boundaries of flame cells is described.
Antonio Palacios +3 more
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Characterization of Dynamics in a Premixed Flame
2020The dynamics of a lean premixed flame is investigated using LES. The instantaneous fields show a V-shaped preheat zone while POD results exhibit the dominant single and double helix structures, which contribute to the rotational motion.
Y. Shen, N. Jaouen, C. Duwig
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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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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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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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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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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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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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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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