Effect of macroscopic heterogeneity of the medium on the solid-state combustion wave characteristics in thermally and chemically heterogeneous media |
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Authors: | T P Ivleva |
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Affiliation: | (1) Institute of Structural Macrokinetics and Material Science Problems, Russian Academy of Sciences, Chernogolovka, 142432 |
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Abstract: | A macroscopically heterogeneous medium is modeled by a set of cylinders (rods) pressed from a mixture of solid reagents, which
have coaxial cylindrical cores made from an inert material. A three-dimensional mathematical model describing propagation
of combustion waves over one cylinder is studied by numerical methods. The influence of the distance between the centerlines
of the neighboring cylinders and transverse sizes of the cylinders on characteristics of combustion waves propagating over
a heterogeneous medium is considered. It is demonstrated that there exists an optimal distance between the inert rods, which
ensures a much higher velocity of the combustion wave along the specimen than the theoretically predicted velocity of the
classical combustion wave propagating over a solid specimen. New types of spinning waves are described, whose motion makes
the high-temperature spot move inside the charge mixture.
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Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 3, pp. 39–49, May–June, 2008. |
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Keywords: | frontal processes burning rate of condensed heterogeneous media spinning waves |
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