Results 251 to 260 of about 3,477,557 (293)
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Flame Root Dynamics and Their Role in the Stabilisation of Lifted Flames
2021This chapter aims to provide a broad overview on the importance of lifted flames in turbulent flows with and without swirl in practical applications for energy production and propulsion. The stabilisation of lifted flames is governed by numerous physical processes that control the behaviour of the flame root or the leading edge.
James C. Massey +2 more
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1990
A steady flat flame on a circular burner can become unstable due to a competition between mass diffusivity and thermal diffusivity. The resulting dynamical modes of propagation have both spatial and temporal characteristics. We describe these characteristics for a variety of periodic and chaotic modes of propagation.
M. A. Gorman, M. el-Hamdi, K. A. Robbins
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A steady flat flame on a circular burner can become unstable due to a competition between mass diffusivity and thermal diffusivity. The resulting dynamical modes of propagation have both spatial and temporal characteristics. We describe these characteristics for a variety of periodic and chaotic modes of propagation.
M. A. Gorman, M. el-Hamdi, K. A. Robbins
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Swirling Flame Dynamics and Describing Function
48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, 2010The present article focuses on the dynamics and response of lean premixed confined swirling flames submitted to plane acoustic perturbations. The axial velocity disturbances and the heat release rate are recorded to determine the flame transfer function.
Paliès, P. +3 more
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Dynamic Electrochemistry in Flame Plasma Electrolyte
Angewandte Chemie, 2012Chemistry in flames: Dynamic electrochemistry in the gas phase is described by considering the ionized medium of a flame as an electrolyte (see picture). This study opens up the possibility of accessing redox reactions that are outside the potential limits set by the solvent in conventional liquid-phase electrochemistry.
Atif, Elahi +2 more
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Non-Normality and Internal Flame Dynamics in Premixed Flame-Acoustic Interaction
48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, 2010This paper investigates the non-normal nature of premixed flame–acoustic interaction. The thermoacoustic system is modelled using the acoustic equations for momentum and energy, together with the equation for the evolution of the flame front obtained from the kinematicG-equation.
SUBRAMANIAN, PRIYA, SUJITH, RI
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Dynamics of Flame Lift-Off in Biogas Swirl Flames
51st AIAA/SAE/ASEE Joint Propulsion Conference, 2015Lift-off limits and mechanism of biogas swirl flames were investigated in a gas turbine model combustor using high-repetition-rate OH* chemiluminescence and simultaneous particle image velocimetry (PIV) and OH planar laser induced fluorescence (PLIF). The biogas fuel was represented by 60% methane and 40% carbon dioxide, volumetrically. The test matrix
Qiang An +2 more
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Symposium (International) on Combustion, 1989
Recent advances in the understanding of the structure, propagation, and extinction of laminar flames under the influence of stretch, as manifested by the existence of flame curvature, flow nonuniformity, and flame motion, are reviewed. The emphasis is on premixed flames because of the richness and subtlety of the phenomena involved.
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Recent advances in the understanding of the structure, propagation, and extinction of laminar flames under the influence of stretch, as manifested by the existence of flame curvature, flow nonuniformity, and flame motion, are reviewed. The emphasis is on premixed flames because of the richness and subtlety of the phenomena involved.
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Dynamics in a Rod Model of Solid Flame Waves
SIAM Journal on Applied Mathematics, 2004Summary: We consider gasless solid fuel combustion in a cylinder of radius \(\tilde{R}\), associated with the SHS (self-propagating high-temperature synthesis) process, which employs combustion waves to synthesize materials. A powder mixture of reactants is cold pressed into a sample, typically a cylinder, and ignited at one end.
J. H. Park +2 more
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The Journal of Chemical Physics, 1973
The kinetics of the CS2–O2 flame for laser applications is described by a computer program (utilizing 24 contributing reactions) allowing vibrationally excited CO to be created from CS + O. The validity of individual contributing rate coefficients has been established through a comparison with experimental evidence on the oxidation of CS2. [K.
David W. Howgate, T. A. Barr
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The kinetics of the CS2–O2 flame for laser applications is described by a computer program (utilizing 24 contributing reactions) allowing vibrationally excited CO to be created from CS + O. The validity of individual contributing rate coefficients has been established through a comparison with experimental evidence on the oxidation of CS2. [K.
David W. Howgate, T. A. Barr
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Dynamics of flame/vortex interactions
Progress in Energy and Combustion Science, 2000Abstract Vortex interactions with flames play a key role in many practical combustion applications. Such interactions drive a large class of combustion instabilities, they control to a great extent the structure of turbulent flames and the corresponding rates of reaction, they occur under transient operations or when flames travel in ducts containing
Dominique Thévenin
exaly +2 more sources