Results 211 to 220 of about 70,875 (242)

Partially premixed turbulent flame propagation in jet flames

Symposium (International) on Combustion, 1994
Flamelet formulations for premixed and non-premixed combustion are combined in order to treat partiallypremixed combustion in the fast chemistry limit. The flamelet concept for non-premixed combustion is based on the equation for the mixture fraction Z (x, t ), while that for premixed combustion uses a field equation for the scalar field G (x, t ...
C.M. Müller, H. Breitbach, N. Peters
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Vortex-flame interactions in opposing-jet premixed flames

38th Aerospace Sciences Meeting and Exhibit, 2000
A time-dependent CFDC code incorporating detailed chemical kinetics for methane combustion was developed for the simulation of local and temporal quenching process that is observed during a vortex-flame interaction in a premixed flame. The chemistry model was validated by simulating a weakly strained axisymmetric counter-flow premixed flame and by ...
V. Katta, W. Roquemore
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Experiments on Impulsively Started Jet Diffusion Flames

AIAA Journal, 1996
The starting vortex of an impulsively generated jet diffusion flame was studied experimentally. Fuel jets were produced by the sudden discharge via a solenoid valve into still air. The fuel jet was ignited by a pilot flame. The length and lateral spread of the flame were determined by video imaging.
H. Johari, K. Desabrais, J. Hermanson
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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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Sensitive Jets and Flames

Nature, 1925
MANY types of sensitive flame have been described from time to time, and measurements of the range of pitch and of the pressure at which they are sensitive have been made, but I have not seen any quantitative record of the variation of the length of such a flame or jet. In this connexion some experiments made recently by Mr. E.
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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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Characterization of impinging jet flames

Combustion and Flame, 1999
This brief communication reports five basic combustion modes of impinging jet flames that have been identified experimentally. The apparatus involves a burner and a water-cooled plate which is positioned directly above the burner nozzle ...
Y ZHANG, K BRAY
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Interferometric visualization of jet flames

Journal of Visualization, 2000
This paper presents visualizations of reacting, round jets of the premixed and nonpremixed type realized by using interferometry and, complementarily, direct photography. The available interferometer, proposed by Carlomagno (1986), employs low-cost components and is flexible and robust to geometrical misalignments, allowing the drawbacks limiting the ...
A. Stella, G. Guj, A. Mataloni
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Diffusion in laminar flame jets

Symposium on Combustion and Flame, and Explosion Phenomena, 1948
Summary The lengths and concentration patterns offlames from circular nozzles burning in free air have been determined over a wide range of velocities with several nozzle diameters and for various gases and primary air-gas ratios. As the nozzle velocity is increased from zero the flame, burning under conditions of diffusional mixing with air ...
H.C. Hottel, W.R. Hawthorne
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Lifted turbulent jet flames

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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