Results 151 to 160 of about 44,661 (206)
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Diffusion-Controlled Cool Flame Propagation Speeds
44th AIAA Aerospace Sciences Meeting and Exhibit, 2006Cool flames in an equimolar propane-oxygen premixture have been studied at reduced gravity in a closed, unstirred, static, spherical reactor. Acquired visual records were then analyzed and used to determine the cool flame propagation speeds for different vessel temperatures and initial reactant pressures.
Michael Foster, Howard Pearlman
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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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Flame Propagation Speed Test of Biomass Gas
Applied Mechanics and Materials, 2014The Bunsen burner was improved to measure the flame propagation speed of biomass gases with different kinds of components using angle method on test bench. The influences of different components, especially CO2, on flame speed propagation and the relations between flame speed and primary air ratio were measured and analyzed.
Jin Qi, Kui Qin Chao, Neng Dai Wan
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Local flame propagation speeds along wrinkled, unsteady, stretched premixed flames
Symposium (International) on Combustion, 1998The local displacement speed was measured along a premixed flame that is wrinkled, unsteady, stretched, and freely propagating. The displacement speed is argued to be the most important and sensitive parameter that must be simulated correctly in numerical simulations of turbulent flames.
Jose O. Sinibaldi +2 more
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High-speed visualization of flame propagation in explosions
Journal of Visualization, 2001Flow visualization data is presented to describe the structure of flames propagating in methane-air explosions in semi-confined enclosures. The role of turbulence is well established as a mechanism for increasing burning velocity by fragmenting the flame front and increasing the surface area of flames propagating in explosions.
G. K. Hargrave +2 more
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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 interferometer system for flame propagation studies
Optics & Laser Technology, 1971Abstract A system comprising a laser interferometer and two high speed cine-cameras has been developed in order to photograph simultaneously in colour the spread of flame among polythene particles suspended in air and the corresponding interferograms of the changes in refractive index.
M. Marchant, J.A. Cobb, R.N. Butlin
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Communications on Pure and Applied Mathematics, 2005
AbstractWe study the effect of homogenization on flame propagation in periodic excitable media when the width of the flame is much smaller than the characteristic size of the heterogeneities. © 2005 Wiley Periodicals, Inc.
Caffarelli, L. A. +2 more
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AbstractWe study the effect of homogenization on flame propagation in periodic excitable media when the width of the flame is much smaller than the characteristic size of the heterogeneities. © 2005 Wiley Periodicals, Inc.
Caffarelli, L. A. +2 more
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The constant-volume propagating spherical flame method for laminar flame speed measurement
Science Bulletin, 2016Laminar flame speed is one of the most important intrinsic properties of a combustible mixture. Due to its importance, different methods have been developed to measure the laminar flame speed. This paper reviews the constant-volume propagating spherical flame method for laminar flame speed measurement.
Mahdi Faghih, Zheng Chen
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Radiation-induced uncertainty in laminar flame speed measured from propagating spherical flames
Combustion and Flame, 2014Laminar 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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