Results 211 to 220 of about 2,832 (254)
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Mechanism of Flame Stabilization in Turbulent, Lifted-Jet Flames
Combustion and Flame, 1998Particle image velocimetry was used to study the velocity field in the stabilization region of lifted, turbulent CH 4 -jet flames over a range of Reynolds numbers from 7000 to 19,500. Measured velocities at the flame base are considerably below the turbulent flame speeds derived from previous studies and show a dependence on the Reynolds number.
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Propagation and fractals of turbulent jet flames
Journal of Propulsion and Power, 1992Propagation of turbulent jet flames under various flow conditions was characterized using a thin-filament pyrometn technique. The flame-propagation data were analyzed by fractal analysis to predict the turbulent flame vekcity, and the results were compared with measured velocity values.
Tzong H. Chen, Larry P. Goss
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1993
NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document. Experiments were conducted on lifted, turbulent jet diffusion flames. An automated technique using a linear photodiode array was implemented to measure the temporal history of the liftoff height h.
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NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document. Experiments were conducted on lifted, turbulent jet diffusion flames. An automated technique using a linear photodiode array was implemented to measure the temporal history of the liftoff height h.
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Blowout of turbulent jet diffusion flames
Fuel, 2014Experiments 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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Radiation characteristics and turbulence–radiation interactions in sooting turbulent jet flames
Combustion Theory and Modelling, 2009The 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 +2 more
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Large Eddy Simulation of a Turbulent Reacting Jet‐Flame
ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, 2001AbstractThe high nonlinearity of the chemical reaction terms requires a closure model for the chemical source terms occurring in the spatially filtered scalar transport equations. Based on the Conditional Moment Closure hypothesis a new model was recently proposed for LES of non‐premixed combustion.
Steiner, H., Bushe, W. K.
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Vortex-flame interactions and extinction in turbulent jet diffusion flames
Symposium (International) on Combustion, 1996Unsteady vortex-flame interactions and subsequent local extinction have been investigated in double-concentric turbulent methane jet diffusion flames stabilized on a thick-walled fuel tube using joint Mie scattering/thin-filament pyrometry (MS/TFP) and two-color particle image velocimetry (PIV).
Fumiaki Takahashi +3 more
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Influence of Pilot Flame Parameters on the Stability of Turbulent Jet Flames
Energy & Fuels, 2016This paper presents a comprehensive study of the effects of pilot parameters on flame stability in a turbulent jet flame. The Sydney inhomogeneous piloted burner is employed as the experimental platform with two main fuels, namely, compressed natural gas and liquefied petroleum gas.
Guiberti, Thibault +3 more
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Eddies in Turbulent Jet Diffusion Flames
Nature, 1953THE turbulent jet diffusion flame may be defined as a flame in which a high-velocity jet of fuel entrains the combustion air by its own momentum. In such flames the rate of combustion is primarily governed by the rate of mixing once the fuel stream has been heated by re-radiation above an ignition temperature.
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Scalar dissipation rates in turbulent jets and jet diffusion flames
Symposium (International) on Combustion, 1989Laser Rayleigh scattering and laser Doppler measurements have been performed in round propane air jets and in the stabilization region of a lifted propane air diffusion flame. While the laser Doppler measurements provide the necessary information about the mean flow field the Rayleigh scattering measurements were performed in order to obtain new data ...
E. Effelsberg, N. Peters
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