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Diffusion-controlled premixed flames
Combustion Theory and Modelling, 2020Steady laminar flow structures with mixing, chemical reaction, and normal strain qualitatively representative of turbulent combustion at the small scales are analysed.
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1996
This chapter will discuss turbulent premixed flames. The distinction between pre-mixed flames and nonpremixed flames is made clear by reviewing the ideal case of each. The ideal nonpremixed flame has fast (equilibrium) chemistry that rapidly adjusts to the local mixture fraction; the mixture fraction is constantly changing.
Jürgen Warnatz +2 more
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This chapter will discuss turbulent premixed flames. The distinction between pre-mixed flames and nonpremixed flames is made clear by reviewing the ideal case of each. The ideal nonpremixed flame has fast (equilibrium) chemistry that rapidly adjusts to the local mixture fraction; the mixture fraction is constantly changing.
Jürgen Warnatz +2 more
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Annual Review of Fluid Mechanics, 1987
Apres un rappel des equations fondamentales, on etudie la structure des flammes du titre pour differents regimes de ...
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Apres un rappel des equations fondamentales, on etudie la structure des flammes du titre pour differents regimes de ...
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Cylindrical premixed laminar flames
Combustion and Flame, 1989Activation energy asymptotics are used to analyze the structure and extinction characteristics of a premixed flame in a right circular cylinder enclosing a stretching vortex line. Effects of variable density and of Lewis numbers that differ from unity are taken into account for a one-reactant system with one-step, Arrhenius chemistry.
Paul A. Libby +2 more
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2011
A work on turbulent premixed combustion is timely because of increased concern about the environmental impact of combustion and the search for new combustion concepts and technologies. An improved understanding of lean fuel turbulent premixed flames must play a central role in the fundamental science of these new concepts. Lean premixed flames have the
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A work on turbulent premixed combustion is timely because of increased concern about the environmental impact of combustion and the search for new combustion concepts and technologies. An improved understanding of lean fuel turbulent premixed flames must play a central role in the fundamental science of these new concepts. Lean premixed flames have the
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Statistics of premixed flame cells
Physical Review A, 1991The statistics of random cellular patterns in premixed flames are analyzed. Agreement is found with a variety of topological relations previously found for other networks, namely, Lewis's law and Aboav's law. Despite the diverse underlying physics, flame cells are shown to share a broad class of geometric properties with other random networks---metal ...
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1990
A steady flat flame on a circular burner can become unstable due to a competition between mass diffusivity and thermal diffusivity. The resulting dynamical modes of propagation have both spatial and temporal characteristics. We describe these characteristics for a variety of periodic and chaotic modes of propagation.
M. A. Gorman, M. el-Hamdi, K. A. Robbins
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A steady flat flame on a circular burner can become unstable due to a competition between mass diffusivity and thermal diffusivity. The resulting dynamical modes of propagation have both spatial and temporal characteristics. We describe these characteristics for a variety of periodic and chaotic modes of propagation.
M. A. Gorman, M. el-Hamdi, K. A. Robbins
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Experiments with Premixed Flames
1988A series of experiments with bluff-body stabilised premixed flames has quantified the flammability and stability limits of a wide range of geometric arrangements [1 to 6] and has provided confirmation of the existence of non-gradient diffusion [7, 8], This paper presents some additional measurements and examines the implications of the findings of the ...
S. Sivasegaram, J. H. Whitelaw
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