Results 161 to 170 of about 26,480 (215)

Non-premixed Flames (Diffusion Flames)

2011
In 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, Jyh-Yuan Chen, A. Carlos Fernandez-Pello   +2 more
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TURBULENT JET DIFFUSION FLAMES

Progress in Energy and Combustion Science, 1976
Publisher 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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Diffusion flame-holes

Combustion Theory and Modelling, 1999
Recent models of straight diffusion flame edges are extended to consider the effect of a curved edge forming the perimeter of an axisymmetric ‘hole’, where a burning flame surrounds a quenched inner region. For ‘free’ flame-holes (without a heat sink near the axis), at small Damkohler number (Da), the holes grow if the initial radius is large but ...
Vedha Nayagam, R Balasubramaniam, Paul D Ronney   +2 more
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Preferential diffusion effects in diffusion flames

2008
Numerical 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, Zhe Xu, Masaharu Komiyama   +2 more
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Turbulent diffusion flames

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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Polyhedral Diffusion Flames

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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The Structure of Diffusion Flames

Combustion Science and Technology, 1976
Abstract 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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Instability of diffusion flames

Symposium (International) on Combustion, 1996
The constant frequency oscillation of buoyant jet diffusion flames is a phenomenon that has been studied extensively during the past three decades. In recent experimental and theoretical works, the coherent flow field and flame structures were analyzed successfully.
A. Lingens, K. Neemann, J. Meyer, M. Schreiber   +3 more
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Diffusion Flame Stability

Combustion Science and Technology, 1973
(1973). Diffusion Flame Stability. Combustion Science and Technology: Vol. 7, No. 6, pp. 241-243.
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Diffusion Flames

Industrial & Engineering Chemistry, 1928
S.P. Burke, T.E.W. Schumann
openaire   +1 more source