Results 221 to 230 of about 24,228 (275)
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Laminar flame speeds of moist syngas mixtures
Combustion and Flame, 2011This work experimentally investigates the effect of the presence of water vapor on the laminar flame speeds of moist syngas/air mixtures using the counterflow twin-flame configuration. The experimental results presented here are for fuel lean syngas mixtures with molar percentage of hydrogen in the hydrogen and carbon monoxide mixture varying from 5 ...
Apurba K. Das +2 more
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Laminar flame speeds of 2,3,3,3-tetrafluoropropene mixtures
Proceedings of the Combustion Institute, 2017Abstract Laminar flame speeds were determined for stoichiometric difluoromethane-air as well as binary mixtures of difluoromethane/tetrafluoropropene and propane/tetrafluoropropene with air using the vertical tube method. To elucidate important reaction pathways, a detailed chemical mechanism has been compiled for modeling these systems as well as ...
P. Papas +5 more
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Asymptotic flame shapes and speeds of hydrodynamically unstable laminar flames
Symposium (International) on Combustion, 1998The self-induced baroclinic instability of flames, the Landau-Darrieus instability, is studied numerically in the nonlinear range. A level set (G equation) based approach accounting for heat-release effects is used to follow the flame response to initial perturbation and shape evolution.
Li-Zheng Ma, Jerzy Chomiak
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Laminar flame speed studies of lean premixed H2/CO/air flames
Combustion and Flame, 2014Abstract Laminar flame speeds of lean premixed H 2 /CO/air mixtures were measured in the counterflow configuration over a wide range of H 2 content at lean conditions. The values were determined by extrapolating the referenced flame speed to zero stretch rate using the non-linear extrapolation method to reduce the systematic error.
Yang Zhang +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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Laminar Flame Speed Experiments of Alternative Liquid Fuels
Journal of Engineering for Gas Turbines and Power, 2019Abstract New laminar flame speed experiments have been collected for two alternative liquid fuels. Understanding the combustion characteristics of these synthetic fuels is an important step in developing new chemical kinetics mechanisms that can be applied to real fuels.
Charles L. Keesee +2 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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Laminar flame speeds and oxidation kinetics of tetrachloromethane
Symposium (International) on Combustion, 1998The laminar flame speeds of blends of tetrachloromethane (CCl 4 ) with methane in air at room temperature and atmospheric pressure were experimentally determined using the counterflow twin-flame technique, varying both the amount of CCl 4 in the fuel and the equivalence ratio of the unburned mixture.
J.C. Leylegian, C.K. Law, H. Wang
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Laminar Flame Speeds of Propane-Nitrous Oxide Mixtures
47th AIAA Aerospace Sciences Meeting including The New Horizons Forum and Aerospace Exposition, 2009Mixtures of propane with nitrous oxide at various nitrogen dilution levels (N2O/(N2O + N2)) were studied to experimentally and numerically determine the adiabatic, laminar flame speed at atmospheric and near-atmospheric pressure (0.8 atm). Over virtually all equivalence ratios examined, a previously integrated chemical mechanism underpredicted the ...
Orval Powell, Chris Dreyer, Paul Papas
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