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Lewis number and Markstein length effects on turbulent expanding flames in a spherical vessel
Experimental Thermal and Fluid Science, 2016The turbulent combustion of three different lean fuel–air mixtures has been investigated in a spherical vessel running at different turbulent intensities. Those mixtures were selected to present almost the same unstretched laminar flame speed but various Markstein lengths and Lewis numbers which are relevant parameters to describe flame-stretch ...
P. Brequigny +2 more
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Measurements of Markstein Numbers and Laminar Burning Velocities for Natural Gas−Air Mixtures
Energy & Fuels, 2003Spherically expanding flames of Chinese natural gas−air mixtures have been used to measure the laminar flame speeds, at equivalence ratios of φ = 0.6−1.4, initial pressures of p = 0.05, 0.1, and 0.15 MPa, and preheat temperatures of T = 300−400 K. Following Markstein theory, one then obtains the corresponding unstretched laminar burning velocity after ...
S. Y. Liao +3 more
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Combustion Science and Technology, 1999
Abstract We present an experimental study of the growth rate of the Darrieus-Landau instability on propane-air and on oxygen enriched propane-air flames using a two-dimensional inverted-“V” flame on a slot burner. We use a novel system of electrostatic deflection to produce an initial perturbation of controlled wavelength and amplitude. The growth rate
JEAN-MARIE TRUFFAUT, GEOFF SEARBY
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Abstract We present an experimental study of the growth rate of the Darrieus-Landau instability on propane-air and on oxygen enriched propane-air flames using a two-dimensional inverted-“V” flame on a slot burner. We use a novel system of electrostatic deflection to produce an initial perturbation of controlled wavelength and amplitude. The growth rate
JEAN-MARIE TRUFFAUT, GEOFF SEARBY
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Fuel, 2004
Experimental test for premixed laminar combustion of liquefied petroleum gas–air mixtures is conducted in a constant volume combustion bomb. Spherically expanding flames have been employed to measure laminar flame speeds over wide equivalence ratios, at the initial pressures of 0.05, 0.1 and 0.15 MPa, and preheat temperatures from 300 to 400 K.
S.Y. Liao +4 more
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Experimental test for premixed laminar combustion of liquefied petroleum gas–air mixtures is conducted in a constant volume combustion bomb. Spherically expanding flames have been employed to measure laminar flame speeds over wide equivalence ratios, at the initial pressures of 0.05, 0.1 and 0.15 MPa, and preheat temperatures from 300 to 400 K.
S.Y. Liao +4 more
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Volume 2: Combustion, Fuels and Emissions, Parts A and B, 2010
For accurate prediction of the laminar flame front propagation the influence of the stretch effect on the burning velocity has to be considered. Thus, only burning velocity and Markstein number together give complete information about the laminar flame front behavior.
Vlade Vukadinovic +2 more
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For accurate prediction of the laminar flame front propagation the influence of the stretch effect on the burning velocity has to be considered. Thus, only burning velocity and Markstein number together give complete information about the laminar flame front behavior.
Vlade Vukadinovic +2 more
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Journal of Engineering for Gas Turbines and Power, 2005
In spark ignition engines, initial flame kernel is wrinkled by a progressively increasing bandwidth of turbulence length scales until eventually the size of the flame kernel is sufficient for it to experience the entire turbulence spectrum. In the present study, an effective rms turbulence velocity as a function of time, estimated by integrating the ...
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In spark ignition engines, initial flame kernel is wrinkled by a progressively increasing bandwidth of turbulence length scales until eventually the size of the flame kernel is sufficient for it to experience the entire turbulence spectrum. In the present study, an effective rms turbulence velocity as a function of time, estimated by integrating the ...
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Turbulent Markstein numbers for Harmonically Forced, Turbulent Premixed Flames
AIAA Scitech 2021 Forum, 2021Sukruth Somappa +6 more
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Volume 4B: Combustion, Fuels and Emissions, 2016
The flame speed is a central element not only in theoretical combustion and basic research but also a key parameter for several combustion models. Various methods to define and measure laminar flame speed have been applied. One method that is being relevant to determine flame speed and flame stretch (quantified by Markstein numbers) under high pressure
Baust, T. +2 more
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The flame speed is a central element not only in theoretical combustion and basic research but also a key parameter for several combustion models. Various methods to define and measure laminar flame speed have been applied. One method that is being relevant to determine flame speed and flame stretch (quantified by Markstein numbers) under high pressure
Baust, T. +2 more
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Flow strain and curvature Markstein numbers of edge flame in the counterflow configuration
International Journal of Hydrogen Energy, 2023Tao Chen, Suyuan Yu, Yu Cheng Liu
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INFLUENCE OF MARKSTEIN NUMBER ON THE PARAMETRIC ACOUSTIC INSTABILITY
2006N.J. Killingsworth, R.C. Aldredge
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