Reduced detonation kinetics and detonation structure in one- and multi-fuel gaseous mixtures

Two-step approximate models of chemical kinetics of detonation combustion of (i) one-fuel (CH4/air) and (ii) multi-fuel gaseous mixtures (CH4/H2/air and CH4/CO/air) are developed for the first time. The models for multi-fuel mixtures are proposed for the first time. Owing to the simplicity and high...

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Published inJournal of physics. Conference series Vol. 894; no. 1; pp. 12100 - 12105
Main Authors Fomin, P A, Trotsyuk, A V, Vasil'ev, A A
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.10.2017
Subjects
Combustion
Detonation waves
Fuel mixtures
Mathematical models
Methane
Model accuracy
Numerical analysis
Physics
Reaction kinetics
Thermodynamics
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Summary:Two-step approximate models of chemical kinetics of detonation combustion of (i) one-fuel (CH4/air) and (ii) multi-fuel gaseous mixtures (CH4/H2/air and CH4/CO/air) are developed for the first time. The models for multi-fuel mixtures are proposed for the first time. Owing to the simplicity and high accuracy, the models can be used in multi-dimensional numerical calculations of detonation waves in corresponding gaseous mixtures. The models are in consistent with the second law of thermodynamics and Le Chatelier's principle. Constants of the models have a clear physical meaning. Advantages of the kinetic model for detonation combustion of methane has been demonstrated via numerical calculations of a two-dimensional structure of the detonation wave in a stoichiometric and fuel-rich methane-air mixtures and stoichiometric methane-oxygen mixture. The dominant size of the detonation cell, determines in calculations, is in good agreement with all known experimental data.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/894/1/012100