Results 141 to 150 of about 294 (185)
Formalism for spatially averaged consumption speed considering spherically expanding flame configuration [PDF]
Combustion and Flame, 2016 WOS:000385909500022International audienceThe determination of laminar burning velocity is a complex task. Even though its definition is well established, achieving a good and reliable value of this quantity seems to be too dependent on the experimental ...
Hakim Larabi +2 more
exaly +2 more sources
Development of an optically accessible apparatus to characterize the evolution of spherically expanding flames under constant volume conditions [PDF]
Combustion and Flame, 2020 International audienceFlame speed is extremely important as it affects the performances of many industrial systems. More- over, its significance makes it a major target for the validation of kinetic mechanisms, which explains the necessity to provide ...
Fabien Halter +2 more
exaly +2 more sources
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Cellularization characteristics of ethyl acetate spherical expanding flame
Fuel, 2021Abstract The cellular instability of ethyl acetate (EA) premixed flame has been studied theoretically and experimentally under different initial temperature, pressure and equivalence ratio. The constant pressure method (CPM) was used to determine the laminar burning velocity of EA spherical expanding flame in this research.
Xiaolu Li +4 more
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Determination of burning velocities from spherically expanding H 2 /air flames [PDF]
Proceedings of the Combustion Institute, 2015 Laminar burning velocities of hydrogen/air mixtures can show discrepancies up to 30%, making chemical mechanism validation and improvement difficult.
Joachim Beeckmann +2 more
exaly +2 more sources
Transition to detonation of an expanding spherical flame
Combustion and Flame, 2017Abstract With a freely expanding unwrinkled spherical flame as an example, it is shown that deflagration-to-detonation transition in unconfined gaseous systems is possible, provided the flame is close to its propagability threshold and the deficient reactant Lewis number is not too small.
Leonid Kagan, Gregory Sivashinsky
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Pressures and their venting in spherically expanding flames
Combustion and Flame, 1977Abstract The Paper gives an analysis of how pressure increases with the increasing radius of a flame in a spherical vessel where the flame is ignited at its centre and propagates symmetrically outwards to the wall. The major assumptions on which the analysis is based: adiabatic compression of the contents of the vessel, the absence of significant ...
V.M. Morton, M.A. Nettleton
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On transition to cellularity in expanding spherical flames
Journal of Fluid Mechanics, 2007The instant of transition to cellularity of centrally ignited, outwardly propagating spherical flames in a reactive environment of fuelx–oxidizer mixture, at atmospheric and elevated pressures, was experimentally determined using high-speed schlieren imaging and subsequently interpreted on the basis of hydrodynamic and diffusional–thermal instabilities.
G. JOMAAS, C. K. LAW, J. K. BECHTOLD
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Investigations on the cellular instabilities of expanding hydrogen/methanol spherical flame
International Journal of Hydrogen Energy, 2021Abstract A comprehensive measurement and investigation of the cellularization of methanol/hydrogen flame is important for the thorough understanding of the transition of turbulent flame. In this work, a constant volume combustion bomb with schlieren photography technology is used to study the flame evolution of methanol/hydrogen fuel.
Han Wu +4 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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The Turbulent Flame Speed of Premixed Spherically Expanding Flames
2017Premixed syngas/air flames expanding in turbulent flow fields are investigated using large scale direct numerical simulations. A parametric analysis is performed in circular and spherical geometries for the detailed investigation of the interaction between the flame front and the turbulent flow field.
G. K. Giannakopoulos +3 more
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