Results 261 to 270 of about 3,130,564 (335)
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1993
Abstract Unlike premixed flames, diffusion flames do not have a burning velocity. Interest therefore lies in their internal structure, in their rates of energy release, in rates of transport of fuel and oxidizer into the flame (burning rates), and in necessary conditions for their existence and extinction.
Amable Linan, Forman A Williams
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Abstract Unlike premixed flames, diffusion flames do not have a burning velocity. Interest therefore lies in their internal structure, in their rates of energy release, in rates of transport of fuel and oxidizer into the flame (burning rates), and in necessary conditions for their existence and extinction.
Amable Linan, Forman A Williams
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Non-premixed Flames (Diffusion Flames)
2011In many combustion processes, the fuel and oxidizer are separated before entering the reaction zone where they mix and burn. The combustion reactions in such cases are called “non-premixed flames,” or traditionally, “diffusion flames” because the transport of fuel and oxidizer into the reaction zone occurs primarily by diffusion.
Sara McAllister +2 more
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TURBULENT JET DIFFUSION FLAMES
Progress in Energy and Combustion Science, 1976Publisher Summary This chapter discusses the turbulent jet diffusion flames of gaseous fuels. This system is simple compared to that in a diesel or gas turbine engine but nevertheless can throw much light on the mechanisms that are involved in the submodels used in describing the more complex systems.
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Preferential diffusion effects in diffusion flames
2008Numerical computations were made of axisymmetric laminar jet diffusion flames taking into account detailed chemical kinetics and multicomponent diffusion. It was shown that preferential diffusion of heat and species causes significant amount of excess and deficit of enthalpy, and increase and decrease of mole fraction in the flame. These effects result
Toshimi Takagi +2 more
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Acta Astronautica, 1979
Abstract Gaseous fuel is injected at a constant rate M from the bottom of a narrow insulated chamber and oxidant diffuses from the top. The object is to determine the response curve, i.e. the unburnt fuel fraction R as a function of M for fixed Damkohler number (representing either the constant chamber pressure or the chamber's length).
M. MATALON +2 more
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Abstract Gaseous fuel is injected at a constant rate M from the bottom of a narrow insulated chamber and oxidant diffuses from the top. The object is to determine the response curve, i.e. the unburnt fuel fraction R as a function of M for fixed Damkohler number (representing either the constant chamber pressure or the chamber's length).
M. MATALON +2 more
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Symposium (International) on Combustion, 1973
Experimental results are presented for turbulent diffusion flames of a round jet of hydrogen in a co-flowing stream of air. The aim of the work is to provide comprehensive data which will assist in refining the newer and more-powerful theories coming into use.
J.H. Kent, R.W. Bilger
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Experimental results are presented for turbulent diffusion flames of a round jet of hydrogen in a co-flowing stream of air. The aim of the work is to provide comprehensive data which will assist in refining the newer and more-powerful theories coming into use.
J.H. Kent, R.W. Bilger
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Combustion Science and Technology, 1973
(1973). Diffusion Flame Stability. Combustion Science and Technology: Vol. 7, No. 6, pp. 241-243.
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(1973). Diffusion Flame Stability. Combustion Science and Technology: Vol. 7, No. 6, pp. 241-243.
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Nature, 1951
BURNER flames of unusual structure may be obtained when certain hydrocarbon gases and vapours are burnt in admixture with air or oxygen. Thus, as first noted by Smithells and Ingle1, and later by Smith and Pickering2, the inner cones of the flames may assume the form of a polyhedron, the number of sides of which is dependent upon prevailing conditions,
J. E. GARSIDE, B. JACKSON
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BURNER flames of unusual structure may be obtained when certain hydrocarbon gases and vapours are burnt in admixture with air or oxygen. Thus, as first noted by Smithells and Ingle1, and later by Smith and Pickering2, the inner cones of the flames may assume the form of a polyhedron, the number of sides of which is dependent upon prevailing conditions,
J. E. GARSIDE, B. JACKSON
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Symposium (International) on Combustion, 1989
Planar visualization was employed to study flame structure and low frequency flame oscillation. Two distinct vortices were visualized in the flames studies: large toroidal vortices outside the luminous flame and small roll-up vortices inside the luminous flame.
L.-D. Chen +3 more
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Planar visualization was employed to study flame structure and low frequency flame oscillation. Two distinct vortices were visualized in the flames studies: large toroidal vortices outside the luminous flame and small roll-up vortices inside the luminous flame.
L.-D. Chen +3 more
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Fire Safety Journal, 1981
Nine classic diffusion flames, i.e., combustion systems with initially separate fuel and oxidizer, are synthesized in a search for common dimensionless parameters which may serve as indice of fire hazard. The problems examined are: planar and cylindrical Burke-Schumann; droplet burning; planar and cylindrical stagnant film; and forced, free, mixed, and
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Nine classic diffusion flames, i.e., combustion systems with initially separate fuel and oxidizer, are synthesized in a search for common dimensionless parameters which may serve as indice of fire hazard. The problems examined are: planar and cylindrical Burke-Schumann; droplet burning; planar and cylindrical stagnant film; and forced, free, mixed, and
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