Coalescence/dispersion modeling of turbulent combustion in a jet-stirred reactor

The results of a direct simulation of high-intensity methane/air combustion are compared to previously reported measurements of OH and O atom concentrations in a jet-stirred reactor. The simulation uses a zero-dimensional coalescence/dispersion model that requires only the initial reactor feed condi...

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Bibliographic Details
Published in:AIAA journal 1986-11, Vol.24 (11), p.1817-1822
Main Authors: Butler, George W, Pratt, David T
Format: Article
Language:English
Subjects:
Applied sciences
Combustion. Flame
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Other techniques and industries
Theoretical studies
Theoretical studies. Data and constants. Metering
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Summary:The results of a direct simulation of high-intensity methane/air combustion are compared to previously reported measurements of OH and O atom concentrations in a jet-stirred reactor. The simulation uses a zero-dimensional coalescence/dispersion model that requires only the initial reactor feed conditions, an appropriate chemical rate mechanism, and estimates of the fluid mixing time scales. Empirical time scales, determined by forcing agreement between simulation and experiment, are of the same order of magnitude as those estimated from either global fluid dissipation length and velocity scales or inviscid arguments based on reactor length and velocity scales. Simulations using these estimates satisfactorily represent the measured temperature and species profiles over a wide range of fuel-air equivalence ratios and, in direct contrast to perfectly stirred reactor predictions, show close agreement with the measured values near stoichiometric conditions. (Author)
ISSN:0001-1452
1533-385X
DOI:10.2514/3.9529