Results 221 to 230 of about 2,832 (254)

Importance of Turbulence-Radiation Interactions in Turbulent Diffusion Jet Flames

Journal of Heat Transfer, 2003
Traditional modeling of radiative transfer in reacting flows has ignored turbulence-radiation interactions (TRI). Radiative fluxes, flux divergences and radiative properties have been based on mean temperature and concentration fields. However, both experimental and theoretical work have suggested that mean radiative quantities may differ significantly
Genong Li, Michael F. Modest
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A novel transient turbulent jet flame for studying turbulent combustion

Proceedings of the Combustion Institute, 2013
Abstract This paper introduces a new class of transient turbulent flames as a new benchmark case for studying turbulent combustion. It also brings together the latest high-speed laser imaging experiments with large-eddy simulation (LES)/probability density function (PDF) to advance the calculations of transient processes in the newly introduced test ...
Haifeng Wang, Mrinal Juddoo, Sten H. Starner, Assaad R. Masri, Stephen B. Pope   +4 more
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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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URANS modelling of pulsed turbulent jets and premixed jet flames

Progress in Computational Fluid Dynamics, An International Journal, 2005
Summary: The formation of self-excited pressure oscillations in technical combustion systems depends on the dynamical behaviour of the flames used. One goal of future combustor development is the prediction of combustion instabilities during the design process. The first aim of the work was to calculate the flame transfer function of forced flames with
Hettel, M., Büchner, H., Weiss, M., Habisreuther, P., Zarzalis, N., Bockhorn, H.   +5 more
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Structure of Turbulent Jet Flames Stabilized in Annular Air Jet

Combustion Science and Technology, 1981
Abstract —Flame features and combustion process of fuel rich double concentric turbulent jet flames were experimentally examined. Flame appearances are very different by the velocity of the annular air jet Uam (or mass velocity ratio λ). The flames of λ = 0.25 and 0.50 for small values of Uam appear to be the conventional wrinkled laminar flames ...
KYOJI KIMOTO, ICHIYO SHIRAISHI, RYUICHI MATSUMOTO   +2 more
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Spark ignition of lifted turbulent jet flames

Combustion and Flame, 2006
This paper presents experiments on ignition and subsequent edge flame propagation in turbulent nonpremixed methane jets in air. The spark position, energy, duration, electrode diameter and gap, and the jet velocity and air premixing of the fuel stream are examined to study their effects on the ignition probability defined as successful flame ...
S AHMED, E MASTORAKOS
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Structural characteristics of lifted turbulent-jet flames

Symposium (International) on Combustion, 1989
Instantaneous planar images of the CH4 concentration in a lifted turbulent-jet flame were obtained by collecting Raman-scattered light perpendicular to a thin sheet of laser light passing through the axis of the flame. The instantaneous images were averaged to obtain mean and fluctuating statistics and probability distributions of the CH4 concentration.
R.W. Schefer, M. Namazian, J. Kelly
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Flame structure and broadening in turbulent premixed jet flames

Combustion and Flame, 2023
Ignacio Trueba-Monje, Jeffrey A. Sutton
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Turbulent jet diffusion flames: consolidation of flame height data

Combustion and Flame, 1999
Literature data on flame heights of turbulent jet diffusion flames are examined in ratios to flame heights of purely buoyant turbulent diffusion flames. The flame height ratio is found to be a function of the gas release momentum in ratio to the momentum generated by a purely buoyant flame.
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Acoustic diagnostics of the nonpremixed turbulent jet flame

5th Aeroacoustics Conference, 1979
The feasibility of inferring information regarding turbulence and combustion details in turbulent combustion zones through the acoustic field is explored. The well known theoretical formulation of Strahle is used. The real difficulty in prediction of the acoustic field is seen to be the unavailability of an expression for the local, instantaneous ...
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