Flamelet Crossing Frequencies and Mean Reaction Rates in Premixed Turbulent Combustion
作者:
K. N. C. Bray,
Paul A. Libby,
J. B. Moss,
期刊:
Combustion Science and Technology
(Taylor Available online 1984)
卷期:
Volume 41,
issue 3-4
页码: 143-172
ISSN:0010-2202
年代: 1984
DOI:10.1080/00102208408923827
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Abstraet–The one-point, one-time description contained in the Bray-Moss-Libby model of premixed turbulent combustion is first generalized to a two-point, two-time formulation which includes information on the time and length scales of the scalar field within turbulent flames. This formulation is then specialized to a one-point, two-time description which is treated in detail so as to yield expressions for the autocorrelation of the progress variable, for the time scale of the scalar field, for the mean crossing frequency of the flamelets and, finally, for the mean rate of chemical reaction. Although the latter expression closely resembles results developed earlier on an intuitive basis, its derivation in the present study permits an assessment of various assumptions and intermediate results by comparison with experimental measurements. Such comparisons as are currently possible are shown to lend support to the analysis and to enhance the prospects of future exploitation of the general formulation.
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