Results 211 to 220 of about 59,420 (258)
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2001
Abstract : In an attempt to refine the database for the evaluation of detailed-chemistry combustion models, absorption spectroscopy has been applied to low pressure, self-deflagrating RDX flames. Semi-empirically determined production rates of reactants from the solid propellant surface, together with a detailed gas-phase elementary reaction set, were ...
John A. Vanderhoff +2 more
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Abstract : In an attempt to refine the database for the evaluation of detailed-chemistry combustion models, absorption spectroscopy has been applied to low pressure, self-deflagrating RDX flames. Semi-empirically determined production rates of reactants from the solid propellant surface, together with a detailed gas-phase elementary reaction set, were ...
John A. Vanderhoff +2 more
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1992
C. K. Law addressed the issue of discrepancies between numerical simulations and experimental observations. He pointed out that simulations employ kinetic and thermal data which are known only approximately. Likewise, experimental data, as recorded, may not conform strictly to conditions experienced by the flame.
A. Kapila, M. Matalon
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C. K. Law addressed the issue of discrepancies between numerical simulations and experimental observations. He pointed out that simulations employ kinetic and thermal data which are known only approximately. Likewise, experimental data, as recorded, may not conform strictly to conditions experienced by the flame.
A. Kapila, M. Matalon
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The Structure of Diffusion Flames
Combustion Science and Technology, 1976Abstract The theory for the mixing and chemical reaction of two streams of fluid is developed for unsteady laminar and for turbulent flow. Only one conserved scalar is required to fully describe the mixing and various reaction models are considered including the Burke-Schumann flame sheet and shifting equilibrium.
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The Structure and Stability of Flame Balls: A Near-Equidiffusional Flame Analysis
SIAM Journal on Applied Mathematics, 1991The energy and species conservation equations are considered in spherical geometry with Arrhenius kinetics. The model is thermal-diffusional (i.e. no fluid mechanical effects are considered). Asymptotic analysis is carried out and stability analysis of the two solutions demonstrated is carried out.
Lee, C. J., Buckmaster, J.
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On Soot Inception in Nonpremixed Flames and the Effects of Flame Structure
Combustion Science and Technology, 1998A simplified three-step model of soot inception has been employed with high activation energy asymptotics to study soot inception in nonpremixed counterflow systems with emphasis on understanding the effects of hydrodynamics and transport. The resulting scheme yields three zones: (1) a fuel oxidation zone wherein the fuel and oxidizer react to form ...
B. H. CHAO, S. LIU, R. L. AXELBAUM
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1992
The state-of-the-art in modelling laminar flames is reviewed in three selected areas, viz., (i) derivation of systematically reduced mechanisms, (ii) asymptotic approaches to investigate the structure of steady flames, and, (iii) numerical approaches to the computation of unsteady flames. For each of these topics representative examples are discussed.
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The state-of-the-art in modelling laminar flames is reviewed in three selected areas, viz., (i) derivation of systematically reduced mechanisms, (ii) asymptotic approaches to investigate the structure of steady flames, and, (iii) numerical approaches to the computation of unsteady flames. For each of these topics representative examples are discussed.
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The structure of laminar flames
Symposium (International) on Combustion, 1957tration alone is increased and the content of the combustible component remains constant. Obviously, for these mixtures the increase in U is not due to the temperature factor, nor is there any change in the physical properties of the mixture. Thus, for a pure nitrogen diluent hE2 = 5.95 X 10 -5 cal/cm sec °C, and for pure oxygen Xo2 = 5.99 )< 10 -5 cal/
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The Journal of Chemical Physics, 1975
The structure of Bunsen cone flame tops is studied using the thermal diffusion flame model. Assuming a strong temperature dependence of the reaction rate, the shape of the flame front as well as the temperature distribution at the front are found. It is shown that for the case in which the Lewis number of the limiting component is greater than unity ...
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The structure of Bunsen cone flame tops is studied using the thermal diffusion flame model. Assuming a strong temperature dependence of the reaction rate, the shape of the flame front as well as the temperature distribution at the front are found. It is shown that for the case in which the Lewis number of the limiting component is greater than unity ...
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The structure of laminar flames
Symposium (International) on Combustion, 1953Resume The hydrodynamic calculations of the shape of a flame in a tube reported by Ball are a significant advance toward the understanding of the structure of flames in tubes. Like Michelson's calculations for a Bunsen flame, an idealized flame shape is obtained which differs from the actual flame shape, particularly near the extremitics.
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1983
Studies of the structure of sooting flames have provided valuable information about chemical and physical processes occurring prior to and during soot formation. These studies have included both laminar and turbulent premixed and diffusion flames, thus permitting sooting behavior to be compared and contrasted for various conditions of practical and ...
Jack B. Howard, James D. Bittner
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Studies of the structure of sooting flames have provided valuable information about chemical and physical processes occurring prior to and during soot formation. These studies have included both laminar and turbulent premixed and diffusion flames, thus permitting sooting behavior to be compared and contrasted for various conditions of practical and ...
Jack B. Howard, James D. Bittner
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