Results 231 to 240 of about 22,777 (264)

Flame Curvature Statistics in Axisymmetric Turbulent Jet Flames

Combustion Science and Technology, 1995
ABSTRACT Flame curvature in axisymmetric turbulent jet flames are obtained experimentally for u'/S L from 0.8–1.5. The measurements indicate that the flame curvature statistics exhibit a substantial change as a function of the axial location in turbulent jet flames primarily due to the evolution of flame wrinkle structures.
T.-W. LEE, R. SHANKLAND, M. FENTON
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Lift-off characteristics of turbulent jet diffusion flames

20th Aerospace Sciences Meeting, 1982
A theoretical analysis of turbulent jet diffusion flames is developed in which the flame is regarded as an ensemble of laminar diffusion flamelets that are highly distorted. The flow inhomogeneities are considered to be sufficiently strong to produce local quenching events for flamelets as a consequence of excessive flame stretch.
Peters, Norbert, Williams, Forman A.
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Stabilization of lifted turbulent-jet flames

Combustion and Flame, 1994
Abstract Planar imaging measurements of CH, CH4, and temperature are used to evaluate current models for flame stabilization in lifted, turbulent CH4-jet flames. The experimental system consists of two cameras that simultaneously record the instantaneous distributions of species concentration and temperature. Measurements were made in two flames with
R.W. Schefer, M. Namazian, J. Kelly
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Coflowing turbulent jet diffusion flame blowout

Symposium (International) on Combustion, 1989
We present results from an experimental and theoretical investigation into the blowout mechanism in turbulent diffusion flames. The blowout stability limits of coflowing turbulent jet diffusion flames are formulated in terms of a recently proposed flame stabilization mechanism based on the large scale organization of entrainment and mixing observed in ...
Werner J.A. Dahm, Robert W. Dibble
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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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Flame stability in combusting turbulent jets

Combustion and Flame, 1976
The paper develops a model for the stability of turbulent methane/air flames on the assumption that reaction kinetics is much more important than the fluid dynamics near blowout. Flame stability is predicted as a function of ambient atmospheric temperature and composition, initial preheat temperature, and the percentage of external product gas ...
H.F. Nelson, Raymond Kushida
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Turbulent hydrocarbon jet flames

Progress in Energy and Combustion Science, 1982
Abstract To consider turbulent hydrocarbon jet flames as an ensemble of wrinkled laminar flames gives useful information about details of the combustion process by studying reactive diffusive interfaces. Combined with the conserved scalar approach, non-premixed turbulent jet flames can be computed with satisfactory accuracy.
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Blowout of turbulent jet diffusion flames

Fuel, 2014
Experiments have been performed to determine the blowout of jet diffusion flames with pure fuels, oxygenated fuels, mixed fuels, and diluted fuels. Stability tests were conducted with pure hydrocarbons at the C2 level to determine the effects of structural differences in the fuels.
Douglas Stamps, Sheldon Tieszen
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Turbulent swirling jet diffusion flames

AIAA Journal, 1969
The phenomenological boundary-layer equations describing the flowfield in a turbulent jet diffusion flame with swirl are solved in the von Mises plane. The expressions found are compared with experimental results for three jet flames with different degrees of swirl using semiempirical values of turbulent exchange coefficients in the flame. The combined
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Radiation characteristics and turbulence–radiation interactions in sooting turbulent jet flames

Combustion Theory and Modelling, 2009
The transported PDF method coupled with a detailed gas-phase chemistry, soot model and radiative transfer equation solver is applied to various turbulent jet flames with Reynolds numbers varying from ∼ 6700 to 15100. Two ethylene–air flames and four flames with a blend of methane–ethylene and enhanced oxygen concentration are simulated.
Ranjan S. Mehta, Michael F. Modest, Daniel C. Haworth   +2 more
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