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The Relationship of the Laminar Flame Width to Flame Speed
Combustion Science and Technology, 1986Abstract The width ( δ ) of a laminar flame is often characterized as a basic property of the flame and is sometimes used in turbulent combustion models to categorize the turbulence scale of the mixture. From computed flame speeds and temperature profiles of C3H8/Oa/Ns (o=1) flames we have determined widths, using definitions based on ( dT*sol;dx)max ...
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The Prediction of Laminar Flame Speeds for Weak Mixtures
Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations, 1996In a recent publication [3], the authors tentatively explored the prediction of propane flame speeds using the calculated burned gas temperature (Tb) and the predicted flame extinction temperature (Ti). A formula was developed which utilised the above temperatures together with correction factors for inlet temperature and the oxygen/inert ratio.
D. Kretschmer, J. Odgers
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Laminar flame speed of Fossil/Air and Biofuels/Air Combustion
11th International Energy Conversion Engineering Conference, 2013Traditional fossil fuels are considered to be largely responsible for the atmospheric environmental degradation. Biofuels can contribute to reducing the dependency on fossil fuels and to lowering greenhouse gas emissions due to aviation transport and can be considered as both renewable and sustainable energy sources. Indeed, biofuels are recognized as “
INGENITO, ANTONELLA +3 more
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A numerical study of the laminar flame speed of stratified methane/air flames
Proceedings of the Combustion Institute, 2000Freely propagating laminar methane/air flames were modeled for spatially stratified equivalence ratio conditions at atmospheric pressure. The GRI 2.11 mechanism was used with a modified version of the Lawrence Livermore National Laboratory HCT code to describe the reaction kinetics.
A. Pires Da Cruz, A.M. Dean, J.M. Grenda
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Laminar Flame Speeds of Gasoline Surrogates Measured with the Flat Flame Method
Energy & Fuels, 2016The adiabatic, laminar flame speeds of gasoline surrogates at atmospheric pressure over a range of equivalence ratios of Φ = 0.8–1.3 and unburned gas temperatures of 298–400 K are measured with the flat flame method, which produces a one-dimensional flat flame free of stretch.
Liao, Y.-H., Roberts, William L.
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A numerical study of laminar flame speed of stratified syngas/air flames
International Journal of Hydrogen Energy, 2018Abstract Numerical simulations are performed to study the flame propagation of laminar stratified syngas/air flames with the San Diego mechanism. Effects of fuel stratification, CO/H2 mole ratio and temperature stratification on flame propagation are investigated through comparing the distribution of flame temperature, heat release rate and radical ...
Wei Wei +3 more
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Uncertainty reduction in laminar flame speed extrapolation for expanding spherical flames
Combustion and Flame, 2018Abstract The quantification and reduction of the uncertainties in the extrapolation process in laminar flame speed measurements were studied using expanding spherical flames under positive Markstein length (Lb> 0) conditions. The experimental and computational results were first compared showing their differences.
Jialong Huo +4 more
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Generating Laminar Flame Speed Libraries for Autoignition Conditions
Volume 4B: Combustion, Fuels, and Emissions, 2020Abstract With advanced gas turbine combustor and internal combustion engine designs, autoignition can happen alongside flame propagation. Laminar flame speeds are required to model flame propagation. Determining laminar flame speeds using simulation assumes flames are freely propagating, an assumption that is not valid when autoignition ...
Karthik V. Puduppakkam +5 more
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Laminar Flame Speeds of Synthetic Gas Fuel Mixtures
Volume 2: Turbo Expo 2005, 2005Laminar flame speeds of H2/CO/CO2 mixtures have been measured over a range of fuel compositions, lean equivalence ratios, and reactant preheat temperature (up to 700 K). The measurements are compared to numerical flame speed predictions based on two reaction mechanisms: GRI Mech 3.0 and a H2/CO mechanism.
J. Natarajan +3 more
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Investigation of the Composition and Laminar Flame Speed of Pyrolysis Gases
Journal of Propulsion and Power, 2019Supercritical thermal cracking experiments using n-dodecane (C12) and two hydrocarbon fuels (HF-I and HF-II) were conducted, and the compositions of the resulting pyrolysis gases were determined.
Dingrui Zhang +4 more
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