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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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1996
Measurements of laminar flame velocities and the experimental determination of concentration- and temperature profiles in laminar flame fronts were introduced in Chapter 2. A challenge to the combustion scientist is to construct a model that will match the observed concentration- and temperature profiles and allows prediction of events for which there ...
Jürgen Warnatz +2 more
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Measurements of laminar flame velocities and the experimental determination of concentration- and temperature profiles in laminar flame fronts were introduced in Chapter 2. A challenge to the combustion scientist is to construct a model that will match the observed concentration- and temperature profiles and allows prediction of events for which there ...
Jürgen Warnatz +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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A study on methane–air premixed flames interacting with syngas–air premixed flames
International Journal of Hydrogen Energy, 2010Abstract Numerical study on the interaction between methane–air and syngas–air premixed flames is conducted according to equivalence ratio and global strain rate in detailed chemistry. This study targets at understanding of an interacting combustion system as an alternative retrofit concept where one can modify the existing facilities minimally in ...
Jeong Soo Kim +5 more
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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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Fundamentals of Premixed Flames
2016Lavoisier, Berthollet and Dalton were pioneers in the understanding of the mixture composition needed for a flame existence, and in the early 1800s, Sir Humphry Davy created a miner’s lamp with a fine meshed net that improved the safety for mine workers, as the mesh was finer than the quenching distance and hence reduced the number of accidental ...
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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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On the turbulence in premixed flames
Acta Astronautica, 1979The theoretical and experimental validity of the “flame generated turbulence” concept is discussed. Some arguments in favour of a more general concept, the “flame/turbulence interaction”, are proposed. It is concluded that the knowledge of this complex interaction problem requires elaborate investigations of the turbulence spectral behaviour in flames.
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1984
Let us consider the motion of flame fronts in flows that can be unsteady and non-uniform. When the length and time scales of the initial flow are larger than those associated with the planar flame (the flame thickness d and the transit time d/uo where uo is the laminar flame speed), the flame front can be considered, in first approximation, as a ...
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Let us consider the motion of flame fronts in flows that can be unsteady and non-uniform. When the length and time scales of the initial flow are larger than those associated with the planar flame (the flame thickness d and the transit time d/uo where uo is the laminar flame speed), the flame front can be considered, in first approximation, as a ...
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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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