Results 1 to 10 of about 61,190 (204)
Does Density Ratio Significantly Affect Turbulent Flame Speed? [PDF]
Flow Turbul Combust, 2017 In order to experimentally study whether or not the density ratio σ substantially affects flame displacement speed at low and moderate turbulent intensities, two stoichiometric methane/oxygen/nitrogen mixtures characterized by the same laminar flame speed SL = 0.36 m/s, but substantially different σ were designed using (i) preheating from Tu = 298 to ...
Lipatnikov AN, Li WY, Jiang LJ, Shy SS.
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The interaction of high-speed turbulence with flames: Turbulent flame speed [PDF]
Combustion and Flame, 2011 44 pages, 20 figures; published in Combustion and ...
Poludnenko, Alexei Y., Oran, Elaine S.
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Scaling of turbulent flame speed for expanding flames with Markstein diffusion considerations [PDF]
Physical Review E, 2013 In this paper we clarify the role of Markstein diffusivity, which is the product of the planar laminar flame speed and the Markstein length, on the turbulent flame speed and its scaling, based on experimental measurements on constant-pressure expanding turbulent flames.
Swetaprovo, Chaudhuri +2 more
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Lewis Number Effects on Flame Speed Statistics in Spherical Turbulent Premixed Flames [PDF]
Flow, Turbulence and Combustion, 2020 AbstractThe influences of characteristic Lewis number$$ \hbox{Le} $$Leon the statistics of density-weighted displacement speed and consumption speed in spherically expanding turbulent premixed flames have been analysed using three-dimensional direct numerical simulations data for$$ \hbox{Le} = 0.8 $$Le=0.8, 1.0 and 1.2 under statistically similar flow ...
G. Ozel-Erol, M. Klein, N. Chakraborty
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Enhancement of turbulent flame speed of V-shaped flames in fractal-grid-generated turbulence
Combustion and Flame, 2016 A variety of fractal grids is used to investigate how fractal-grid-generated turbulence affects the turbulent flame speed for premixed flames. The grids are placed inside a rectangular duct and a V-shaped flame is stabilized downstream of the duct, using a metal wire. This flame is characterized using OH-LIF.
A.A. Verbeek +4 more
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The “turbulent flame speed” of wrinkled premixed flames
Comptes Rendus. Mécanique, 2012 The determination of the turbulent flame speed is a central problem in combustion theory. Early studies by Damköhler and Shelkin resorted to geometrical and scaling arguments to deduce expressions for the turbulent flame speed and its dependence on turbulence intensity.
Moshe Matalon, CRETA, Francesco
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Flame speed characteristics of turbulent expanding flames in a rectangular channel
Combustion and Flame, 2019 Abstract We present results from studies of freely expanding flames in a unique small-scale convective facility for different free-stream initial conditions, characterized by Taylor-Reynolds numbers in the range of R e λ g = 179 − 395 (using the streamwise RMS velocity component and the lateral Taylor-microscale) and an inertial ...
Dan Fries +4 more
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Turbulent flame speed based on the mass flow rate: Theory and DNS [PDF]
Combustion and Flame, 2022 Starting with an integral formulation of mass flow rate through an ensemble of isotherms constituting a statistically planar, turbulent premixed flame, a scaling for the corresponding turbulent flame speed is derived without invoking Damk{\"o}hler's ...
Swetaprovo Chaudhuri, B. Savard
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Energies, 2022 The relationship between the flow field and flame propagation is essential in determining the dynamics and effects of turbulent flow in an optical SI engine.
Yuji Ikeda
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Self-Turbulent Flame Speeds [PDF]
Flow, Turbulence and Combustion, 2011 This paper reports an experimental investigation of premixed propane andmethane-air flames propagating freely in tubes 1.5 m long and with diameters rangingfrom 26 to 141 mm. The thermo-acoustic instability was eliminated by means of anovel acoustic absorber placed at the closed end of the tube.
Quinard, Joel +3 more
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