Results 271 to 280 of about 11,005 (312)
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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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Combustion and Flame, 1982
Abstract Quenching of laminar flames entering a region of intense turbulence without mean flow was studied by instantaneous temperature, global and local chemiluminescence measurements, and fast Schlieren photography. The experiments were performed in a constant-pressure, square 50 × 50 mm tube for flammability limit studies for two integral scales ...
Jerzy Chomiak, Józef Jarosiński
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Abstract Quenching of laminar flames entering a region of intense turbulence without mean flow was studied by instantaneous temperature, global and local chemiluminescence measurements, and fast Schlieren photography. The experiments were performed in a constant-pressure, square 50 × 50 mm tube for flammability limit studies for two integral scales ...
Jerzy Chomiak, Józef Jarosiński
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On the propagation of turbulent flames
Combustion and Flame, 1969Abstract Richardson's rigorous definition of the turbulent burning velocity is restated for a one-dimensional turbulent approach flow and an average flame orientation perpendicular to the flow direction. This definition is then used to discuss the transient behaviour of flames in a turbulent environment.
Ahto Palm-Leis, Roger A. Strehlow
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Proceedings of the Royal Society of London. Series A: Mathematical and Physical Sciences, 1995
Abstract A review is presented of turbulent transport phenomena in flames. Both large-scale turbulent transport and small-scale mixing processes are considered and various mechanisms of interaction between combustion and turbulent flow are identified. Flame-surface density descriptions of turbulent combustion at high Damköhler numbers
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Abstract A review is presented of turbulent transport phenomena in flames. Both large-scale turbulent transport and small-scale mixing processes are considered and various mechanisms of interaction between combustion and turbulent flow are identified. Flame-surface density descriptions of turbulent combustion at high Damköhler numbers
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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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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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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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Combustion and Flame, 1973
According to the Fourier integral theorem, a turbulent velocity field can be represented as asuperposition of plane sinusoidal shear waves of all orientations and wavelengths. The present paper is concerned with the analysis of the passage of a single representative shear wave through a plane flame front.
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According to the Fourier integral theorem, a turbulent velocity field can be represented as asuperposition of plane sinusoidal shear waves of all orientations and wavelengths. The present paper is concerned with the analysis of the passage of a single representative shear wave through a plane flame front.
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1955
The work presented in this thesis is an attempt to investigate the influence of turbulence on the rate of propagation of a flame in a flowing gas stream. It is generally accepted that turbulence wrinkles or roughens the flame front and that the increased flame surface results in an overall rate of flame propagation greater than laminar value.
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The work presented in this thesis is an attempt to investigate the influence of turbulence on the rate of propagation of a flame in a flowing gas stream. It is generally accepted that turbulence wrinkles or roughens the flame front and that the increased flame surface results in an overall rate of flame propagation greater than laminar value.
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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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