Results 211 to 220 of about 43,956 (263)
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Reaction Regimes in Supersonic Combustion
47th AIAA Aerospace Sciences Meeting including The New Horizons Forum and Aerospace Exposition, 2009Large-eddy simulations (LES) of supersonic combustion are considered to be an important tool to better understand the physics of supersonic reactive flows. To correctly predict the flame anchoring and the flame structure, the implementation of a appropriate SGS scale model is crucial, and its physics and derivation are analyzed in the present work.
INGENITO, ANTONELLA, C. Bruno
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Reactions in the combustion of hydrocarbons
Reaction Kinetics and Catalysis Letters, 1982Combustion of LPG produces carbon dioxide directly up to a temperature of 525°C. In addition, the formation of unsaturates is observed at temperatures above 550°C as a result of oxidative dehydrogenation and subsequent combustion of unsaturates to carbon dioxide at temperatures higher than 575°C.
A. Kumar, M. S. Murthy
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Reaction–diffusion pulses: a combustion model
Journal of Physics A: Mathematical and General, 2004Summary: We focus on a reaction-diffusion approach proposed recently for experiments on combustion processes, where the heat released by combustion follows first-order reaction kinetics. This case allows us to perform an exhaustive analytical study. Specifically, we obtain exact expressions for the speed of thermal pulses, their maximum temperature and
Campos, Daniel +2 more
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Multichannel reactions in combustion
Symposium (International) on Combustion, 1994A survey is given on two theoretical treatments of multichannel reactions: (1) a strong collision modeland (2) solutions of the master equation based upon an exponential energy gap model for the energy transfer by collisions. Theoretical results for a three-channel model reaction, obtained by (1) and (2), are compared.
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Integration of combustion reaction systems
Computers & Chemical Engineering, 1984Abstract When integrating the mass and energy balances with a stiff integrator, such as LSODE (Hindmarsh, [1]), absolute error tolerances are inefficient during the initiation of free radicals, loss of precision in evaluating the algebraic mass balances can lead to numerical instability, and integrator stall can occur when species decay to depletion ...
Charles W. White, Warren D. Seider
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HO2 radicals in combustion reactions
Symposium (International) on Combustion, 1973D discussion of the role of HO 2 radicals in combustion reactions is presented. It is shown thatelementary reactions of HO 2 with H atoms to form H 2 O+O, H 2 +O 2 , and OH are of importance, and should not be neglected in the mechanism of H 2 oxidation and combustion, particularly near the explosion limits. Depending upon the flame conditions, HO 2
V.N. Kondratiev, V.V. Azatyan
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Mixing and chemical reaction in continuous combustion
Progress in Energy and Combustion Science, 1976Publisher Summary This chapter discusses the pollutant formation processes in continuous combustion devices such as power generation furnaces and gas turbine/turbojet combustors. The lack of success in the prediction of the pollutant formation processes in continuous combustion devices is because of two factors: first, the chemical-kinetic coupling ...
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The Journal of Chemical Physics
In view of the shortcomings of the previous NH3/DME reaction mechanism, combustion reaction mechanisms of NH3, DME, and NH3/DME were constructed by using the minimized reaction network method under the condition of determining the number of chemical species. The mechanism of the construction had a simple reaction network using reversible reaction form,
Wenhan Zhang +4 more
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In view of the shortcomings of the previous NH3/DME reaction mechanism, combustion reaction mechanisms of NH3, DME, and NH3/DME were constructed by using the minimized reaction network method under the condition of determining the number of chemical species. The mechanism of the construction had a simple reaction network using reversible reaction form,
Wenhan Zhang +4 more
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Comparison of Combustion Models and Reaction Mechanisms for FLOX® Combustion
Volume 2: Combustion, Fuels and Emissions, 2009Flameless combustion is characterized by very low NOx and CO emissions. It has successfully been used in technical furnaces under atmospheric conditions for many years. For the use in modern gas turbines the combustors have to be redesigned to meet the typical operating condition, i.e. high pressure and temperature.
Panne, Tobias +2 more
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Chain Reaction Mechanism in Hydrogen/Fluorine Combustion
The Journal of Physical Chemistry A, 2013Vibrationally excited species have been considered to play significant roles in H2/F2 reaction systems. In the present study, in order to obtain further understanding of the chain reaction mechanism in the combustion of mixtures containing H2 and F2, burning velocities for H2/F2/O2/N2 flames were measured and compared to that obtained from kinetic ...
Akira, Matsugi +3 more
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