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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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Reaction- and mixing-controlled combustion in scramjet engines
9th International Space Planes and Hypersonic Systems and Technologies Conference, 1999H2-fueled scramjet engines were tested under Mach 4 (M4) to Mach 8 (M8) e ight conditions, and the local equivalenceratio andcombustion efe ciency weremeasured by gassampling attheengineexit.Correlationbetween the local values of equivalence ratio and combustion efe ciency showed that the M4 combustion was principally reaction controlled and the ...
Tohru Mitani +2 more
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The numerical solution for reaction–diffusion combustion with fuel consumption
Applied Mathematics and Computation, 2005A classical problem concerning the reaction between a gaseous oxidant and a solid porous fuel, including the effects of consumption of the solid fuel of a poisoning of a solid catalyst, is studied numerically in this paper. The initial boundary value problem is presented in Section 2, while the numerical solution with the corresponding results---mostly
M. R. Abd El-Salam, M. H. Shehata
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Hybrid modeling of homogenous gas-phase combustion reactions
Monte Carlo Methods and Applications, 2011Summary: This paper presents a hybrid model (stochastic/deterministic) that describes the time evolution of chemical species in a homogeneous gas-phase combustion reaction process at constant volume. First, currently employed stochastic algorithms are briefly introduced. Next, the development of the hybrid algorithm is detailed.
Terry Brumback, Chien-Pin Chen
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Pseudotransient Continuation for Combustion Simulation with Detailed Reaction Mechanisms
SIAM Journal on Scientific Computing, 2016Summary: We study pseudotransient continuation \((\Psi\mathrm{tc})\) as a nonlinear solver for implicit discretizations of combustion problems with detailed chemical models. Detailed models produce extreme stiffness, nonlinearity, and a transient instability associated with ignition/extinction phenomena.
Michael A. Hansen, James C. Sutherland
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Ignited Combustion Criterion of a Reaction
Journal of the Physical Society of Japan, 1992Physical significance of n τ is studied, where n is the number density and τ the confinement time of a reaction. By introducing a fundamental parameter, the ideal and the actual ignited combuson criteria for various reactions are compared. The reason why the hurdle of n τ is very high for nuclear fusion by magnetic confined plasma, while very low for ...
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Simplified Reaction Models for Combustion in Gas Turbine Combustion Chambers
2012The aim of this work is an effective dimension reduction of chemical combustion mechanisms. Despite permanently growing computer power, the simulation of a reaction-diffusion-convection system involving a large scale chemical combustion mechanism is still far from reach. On the other hand, prediction of e.g.
Dirk Lebiedz, Jochen Siehr
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Synthesis of functional materials in combustion reactions
Physics of Atomic Nuclei, 2015The conditions for obtaining oxide compounds in combustion reactions of nitrates of metals with organic chelating–reducing agents such as amino acids, urea, and polyvinyl alcohol are reviewed. Changing the nature of internal fuels and the reducing agent-to-oxidizing agent ratio makes possible to modify the thermal regime of the process, fractal ...
V. D. Zhuravlev +3 more
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Reaction zone monitoring in biomass combustion
Control Engineering Practice, 2018Abstract In this work we demonstrate the utilization of a machine vision-based combustion monitoring system in biomass combustion. The proposed system monitored the location of the reaction zone in a 3 MW, grate-fired biomass boiler operated at varying loads and with fluctuating fuel quality.
Attila Garami +3 more
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