Influence of the choice of kinetic mechanism on predicted structure of lean hydrogen–air flames

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Resumo

The influence of the choice of a detailed kinetic mechanism (DKM) on the structure of a laminar flame for lean hydrogen-air mixtures has been studied by means of numerical simulation using a CHEMKIN-Pro software module. It is shown that the choice of three detailed kinetic mechanisms (DKMs), differing in the rate constants of elementary reactions, the number of reaction pathways, and the presence of additional components, has virtually no effect on flame propagation velocity and flame structure. It is found that small differences in the local sensitivity of heat release to elementary reactions can provide reliable information on possible ways of influencing flame propagation.

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Sobre autores

A. Tereza

Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences

Autor responsável pela correspondência
Email: tereza@chph.ras.ru
Rússia, Moscow

G. Agafonov

Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences

Email: tereza@chph.ras.ru
Rússia, Moscow

E. Anderzhanov

Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences

Email: tereza@chph.ras.ru
Rússia, Moscow

A. Betev

Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences

Email: tereza@chph.ras.ru
Rússia, Moscow

S. Khomik

Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences

Email: tereza@chph.ras.ru
Rússia, Moscow

T. Cherepanova

Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences

Email: tereza@chph.ras.ru
Rússia, Moscow

A. Cherepanov

Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences

Email: tereza@chph.ras.ru
Rússia, Moscow

S. Medvedev

Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences

Email: tereza@chph.ras.ru
Rússia, Moscow

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2. Fig. 1. Concentration and temperature profiles (a) and temperature sensitivity analysis to reactions determining heat release in a laminar flame (b), calculated using the DCM from [10] for a mixture of 15% H2 in air under normal initial conditions

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3. Fig. 2. The same as in Fig. 1, but using the DCM from [21].

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4. Fig. 3. The same as in Fig. 1, but using the DCM from [22].

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