Results 221 to 230 of about 946 (264)

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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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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Lewis number effects on turbulent burning velocity

Symposium (International) on Combustion, 1985
Experimental values of turbulent burning velocities for propane, hydrogen and iso-octane mixtures with air are reported under conditions of high turbulence and high turbulent Reynolds number. The measurements were made by the double kernel method during explosions in a fan-stirred bomb, with four fans, capable of speeds of up to 10,000 rpm.
R.G. Abdel-Gayed, D. Bradley, M.N. Hamid, M. Lawes   +3 more
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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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Turbulent burning velocities and flame straining in explosions

Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences, 1984
Abstract 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 ...
R. G. Abdel-Gayed, K. J. Al-Khishali, Derek Bradley   +2 more
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The influence of turbulence on the burning velocity of premixed CH4-H2 flames with different laminar burning velocities

Symposium (International) on Combustion, 1989
The influence of the turbulence on the turbulent burning velocity ST of a premixed flame, characterized by a flat flame front stabilized in a stagnation flow was investigated using a two component Laser-Doppler-velocimetry (LDV) technique. The use of different CH4-H2 combustion mixtures enabled the laminar burning velocity SL: to be varied between 0 ...
Liu, Yansong, Lenze, Bernhard
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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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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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Laminar and turbulent burning velocities of propane in spherical vessels

Shock Waves, 1992
Laminar and turbulent burning velocities of C3H8/air mixtures under moderately elevated temperature and pressure conditions have been determined experimentally using spherical combustion bombs. The results are reported here and the effects of temperature, pressure, turbulence intensity and stoichiometric ratio are included.
Y. Tanaka, B. E. Milton
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