Results 161 to 170 of about 32,275 (199)

Turbulent burning velocity predictions using transported PDF methods

Proceedings of the Combustion Institute, 2011
Abstract The joint-scalar transported PDF approach is applied to compute freely propagating turbulent premixed flames with burning velocities determined for a range of turbulence intensities and fuel mixtures. The computed cases include rich hydrogen, stoichiometric and lean methane and stoichiometric ethane flames.
R.P. Lindstedt, V.D. Milosavljevic, M. Persson   +2 more
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Is turbulent burning velocity a meaningful parameter?

Combustion, Explosion, and Shock Waves, 1993
The concept of turbulent burning velocity arises from an analogy with that of the laminar burning velocity. Experimental measurement or theoretical computation of the latter must take account of the effects of flame stretch. This is also necessary for turbulent flames, and when flame propagation originates at a point source, there is a temporal ...
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Turbulent Burning Velocities of Outwardly Propagating Flames

SAE Technical Paper Series, 2002
<div class="htmlview paragraph">In combustion engines, turbulence generated by flow field motion in the cylinder affects the propagating flame initiated by a spark plug, resulting in the increase of heat release rate and thus power available from an engine of a given size.
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On the Correlation of Turbulent Burning Velocities

Combustion Science and Technology, 1980
Abstract A new formulation of the spectral interpretation of turbulent burning velocities is proposed. The correlation formula based on this interpretation is tested against existing experimental data on turbulent burning ...
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Turbulent Burning Velocity of High Hydrogen Flames

Journal of Engineering for Gas Turbines and Power
Abstract The turbulent burning velocity (ST) is one of the most important combustion properties controlling combustor operability limits, directly influencing blowoff, flashback, and combustion instabilities. Hydrogen has particularly significant influences on the turbulent flame speed.
Hari Priya Rajagopalan, Renee Cole, David Wu, Ben Emerson, Tim C. Lieuwen   +4 more
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Structure and burning velocity of turbulent premixed flames

Combustion and Flame, 1968
Abstract Annular turbulent premixed flames have been stabilized by means of an ‘opposed jet burner’. Determinations of the mean gas flow velocity, the intensity of turbulence, the Eulerian scale and the microscale have been made in the flame stabilization region; the thickness of the flame has been estimated from photographic pictures.
J. Vinckier, A. Van Tiggelen
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Effect of pressure on turbulent burning velocity

Combustion and Flame, 1958
Abstract Turbulent burning velocities were measured for three fueloxidant systems (propaneair, hydrogenair, and propane50 per cent oxygen50 per cent nitrogen) over a range of pressures at nearly constant Reynolds number. At constant Reynolds number, the pressure exponent for turbulent burning velocity was consistently about 0·3 greater in ...
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Turbulent burning velocities and flame straining in explosions

Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences, 1984
Turbulent burning velocities have been measured in an explosion bomb equipped with four high speed fans. Turbulent parameters were measured by laser doppler anemometry. The turbulent Reynolds numbers were significantly higher than in most previous measurements and high rates of strain were achieved until, ultimately, several of the flames quenched ...
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Modification of the turbulent burning velocity by gas expansion

Proceedings of the Combustion Institute, 2000
Premixed turbulent combustion in the corrugated flamelets regime has been addressed by modeling of a G-equation containing a gas-expansion term, the form of which was derived by generalizing results of Sivashinsky along lines initiated by Frankel. Previous analyses by the first author of the mean, variance, and two-point correlation spectrum of G, as ...
N. Peters, H. Wenzel, F.A. Williams
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The turbulent burning velocity for large-scale and small-scale turbulence

Journal of Fluid Mechanics, 1999
The level-set approach is applied to a regime of premixed turbulent combustion where the Kolmogorov scale is smaller than the flame thickness. This regime is called the thin reaction zones regime. It is characterized by the condition that small eddies can penetrate into the preheat zone, but not into the reaction zone.By considering the iso ...
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