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Radiation-induced uncertainty in laminar flame speed measured from propagating spherical flames [PDF]
Combustion and Flame, 2014 Laminar flame speeds measured using the propagating spherical flame method are inherently affected by radiation. Under certain conditions, a substantial uncertainty in laminar flame speed measurement is caused by radiation, which results in a great concern for kinetic mechanism validation and development.
Hao Yu +6 more
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Combustion and Flame, 2015
Abstract The definition of the flame displacement speed (FDS), often used to characterize the dynamical properties of premixed flames, is generally ambiguous because, except for a steadily propagating planar flame, the mass flow rate through the combustion region varies with distance through the flame and one is therefore faced with the difficulty of
Christos E Frouzakis +2 more
exaly +2 more sources
Abstract The definition of the flame displacement speed (FDS), often used to characterize the dynamical properties of premixed flames, is generally ambiguous because, except for a steadily propagating planar flame, the mass flow rate through the combustion region varies with distance through the flame and one is therefore faced with the difficulty of
Christos E Frouzakis +2 more
exaly +2 more sources
Effects of electric field intensity and distribution on flame propagation speed of CH4/O2/N2 flames
Fuel, 2015Abstract In order to study the effects of electric field intensity and distribution on flame propagation speed, the paper investigated the flame propagation of premixed CH 4 /O 2 /N 2 mixtures under direct-current (DC) electric fields at an excess air ratio of 1.4.
Chao Li
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Proceedings of the Combustion Institute, 2019
Abstract Laminar burning velocities are of great importance in many combustion models as well as for validation and improvement of chemical kinetic schemes. Determining laminar burning velocities with high accuracy is quite challenging and different approaches exist.
Heinz Pitsch +2 more
exaly +3 more sources
Abstract Laminar burning velocities are of great importance in many combustion models as well as for validation and improvement of chemical kinetic schemes. Determining laminar burning velocities with high accuracy is quite challenging and different approaches exist.
Heinz Pitsch +2 more
exaly +3 more sources
Study on peak overpressure and flame propagation speed of gas deflagration in the tube with obstacles [PDF]
Science China Technological Sciences, 2010 The on-way peak overpressure and flame propagation speed of gas deflagration in the tube with obstacles are important data for process safety. Based on carbon monoxide deflagration experiments, the paper presents a multi-zone integration model for ...
Xiaolin Wei, Sen Li, Lixin Yu
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Flame speed scaling in autoignition-assisted freely propagating n-heptane/air flames
Proceedings of the Combustion Institute, 2021Abstract Autoignition and flame propagation embody different controlling mechanisms for flame stabilization in various modern combustion devices such as the internal combustion engines with hot air and elevated pressure environments. In this study, the flame structure and propagation speed scaling for n-heptane/air mixtures are numerically ...
Xue Gong, Zhuyin Ren
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Bounds for the propagation speed of combustion flames
Journal of Physics A: Mathematical and General, 2004Summary: We focus on a combustion model for premixed flames based on two coupled equations determining the spatial dynamics of temperature and fuel density. We rewrite these equations as a classical reaction-diffusion model, so that we can apply some known methods for the prediction of lower and upper bounds to the front speed.
Fort, Joaquim +3 more
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High-Speed Flame Propagation in a Channel and Transition to Detonation
High Temperature, 2020The physical mechanisms controlling the development of a flame prior to transition to detonation in a channel filled with a combustible gaseous mixture are systemized and analyzed. The features of the development of the accelerated flame in a channel are demonstrated with the results of numerical simulation for smooth and obstructed channels.
A. D. Kiverin, I. S. Yakovenko
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Propagation speeds for interacting triple flames
Combustion and Flame, 2018Abstract Triple (or tribrachial) flames propagate through mixtures faster than the premixed laminar flame speed due to streamline divergence ahead of the flame base that decelerates the flow into the leading edge of the flame. When multiple triple flames are in close proximity, the bulk propagation speed of the structure can be even faster due to ...
Stephen W. Grib, Michael W. Renfro
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Flame Speed and Self-Similar Propagation of Expanding Turbulent Premixed Flames
Physical Review Letters, 2012In this Letter we present turbulent flame speeds and their scaling from experimental measurements on constant-pressure, unity Lewis number expanding turbulent flames, propagating in nearly homogeneous isotropic turbulence in a dual-chamber, fan-stirred vessel.
Swetaprovo, Chaudhuri +3 more
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