The propagation of reaction fronts in condensed phase combustion, sometimes referred to as 'self-propagating high-temperature synthesis' due to its application in the synthesis of metal alloys, has been experimentally observed to occur in a variety of ways. In addition to a steady planar movement of the combustion front, such systems are able to exhibit various nonsteady modes of propagation. The present work (Margolis et al. , 1984) considers a nonlinear stability analysis of combustion in a condensed medium in order to describe various nonsteady modes of propagation, including the pulsating, spinning and multiple point phenomena described above. Our analysis employs the two-phase models of Margolis (1983, 1984) which, in contrast with single-phase models, account for melting of the limiting component of the reaction. The problem which we analyze is that of a reaction front propagating through a solid combustible mixture contained in a long cylindrical channel of radius R with insulated boundaries. To describe this process of 'condensed flame propagation,' we employ models which assume large, but finite, activation energy of a one-step chemical reaction in which two finely ground metallic powders combine to form a solid product.
|Original language||English (US)|
|Journal||Chemical and Physical Processes in Combustion, Fall Technical Meeting, The Eastern States Section|
|State||Published - Dec 1 1984|
ASJC Scopus subject areas
- Fuel Technology