Results 111 to 120 of about 215 (163)
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Influence of Vorticity on Counterflow Diffusion Flames
Combustion Science and Technology, 1987Abstract The extinction characteristics of diffusion flames of methane and butane in counterflow jets under opposing rigid-body rotation are investigated. It is found that the critical volumetric concentration of fuels in nitrogen corresponding to flame extinction decrease to a minimum value and increase thereafter as the jet angular velocity increases.
T. H. LIN, S. H. SOHRAB
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Multiradii modeling of counterflow spray diffusion flames
Proceedings of the Combustion Institute, 2000A multiradii spray flame model is derived in a kinetic framework in which the droplets' distribution function is taken as a sum of delta products. The droplet class equations are obtained by taking moments of the Boltzmann-type spray equation. The gas-phase equations are coupled to the droplets equations through various integral sources terms.
R. Ben Dakhlia, V. Giovangigli
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Combustion of Kerosene in Counterflow Diffusion Flames
Journal of Propulsion and Power, 2001Numerical modeling has become an essential tool in combustion research as a means of predicting combustion performance and pollutant formation, e.g., NO x and soot. In many combustion models the combustion of a commercial fuel such as kerosene has been represented by single-step empirical expressions. To predict kinetically controlled phenomena, a more
P. M. Patterson +4 more
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Progress in Energy and Combustion Science, 1982
Abstract Laminar counterflow diffusion flames are generally referred to as the pure diffusion flame. This paper reviews experimental studies of these counterflow diffusion flames and presents a detailed summary of our present understanding of them.
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Abstract Laminar counterflow diffusion flames are generally referred to as the pure diffusion flame. This paper reviews experimental studies of these counterflow diffusion flames and presents a detailed summary of our present understanding of them.
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Soot formation in unsteady counterflow diffusion flames
Proceedings of the Combustion Institute, 2009Abstract The formation of pollutant species in turbulent diffusion flames is strongly affected by the coupling between the highly non-linear chemical kinetics with three-dimensional, unsteady hydrodynamics. It is necessary to better understand this interdependency of transport and kinetic mechanisms, in order to accurately predict non-equilibrium ...
CUOCI, ALBERTO +3 more
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Aggregate formation in sooting counterflow diffusion flames
Proceedings of the Combustion Institute, 2002Soot formation is investigated experimentally and numerically in a counterflow diffusion flame which isformed by an acetylene/nitrogen mixture on the fuel side and hot postflame gases of a lean premixed flame on the oxidizer side. The modeling approach uses a detailed chemical mechanism with 453 reactions and 82 species.
C. Pels Leusden, C. Hasse, N. Peters
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Counterflow Diffusion Flames of General Fluids: Oxygen/Hydrogen Mixtures
45th AIAA Aerospace Sciences Meeting and Exhibit, 2007Abstract A comprehensive framework has been established for studying laminar counterflow diffusion flames for general fluids over the entire regime of thermodynamic states. The model incorporates a unified treatment of fundamental thermodynamic and transport theories into an existing flow solver DMCF to treat detailed chemical kinetic mechanisms and ...
Ribert, Guillaume +5 more
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Edge flame instability in low-strain-rate counterflow diffusion flames
Combustion and Flame, 2006Abstract Experiments in low-strain-rate methane–air counterflow diffusion flames diluted with nitrogen have been conducted to study flame extinction behavior and edge flame oscillation in which flame length is less than the burner diameter and thus lateral conductive heat loss, in addition to radiative loss, could be high at low global strain rates ...
June Sung Park +7 more
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Effect of Outer Edge Flame on Flame Extinction in Counterflow Diffusion Flames
Transactions of the Korean Society of Mechanical Engineers B, 2012The present study on nitrogen-diluted non-premixed counterflow flames with finite burner diameters experimentally investigates the important role of the outer edge flame in flame extinction. Flame stability diagrams mapping the flame extinction response of nitrogen-diluted non-premixed counterflow flames to varying global strain rates in terms of the ...
Yong-Ho Chung +5 more
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Preferential diffusion and concentration modification in sooting counterflow diffusion flames
Symposium (International) on Combustion, 1989An experimental investigation has been conducted on the influence of the mobility of inert additives on soot formation in propane and ethylene counterflow diffusion flames. Inerts used were helium, neon, argon, or krypton, and the results show that while the mobility of the inert has practically no effect when a small amount of inert is added to the ...
R.L. Axelbaum, C.K. Law, W.L. Flower
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