Influence of subsurface gaseous combustion on the burning of confined porous energetic materials
| Autor: | Stephen B. Margolis, Forman A. Williams, Alexander M. Telengator |
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| Rok vydání: | 2003 |
| Předmět: | |
| Zdroj: | Combustion Science and Technology. 175:421-452 |
| ISSN: | 1563-521X 0010-2202 |
| DOI: | 10.1080/00102200302386 |
| Popis: | The combustion of porous energetic materials under confinement is generally characterized by a relatively rapid increase in the flame-propagation speed as the pressure difference, or overpressure, between the burned gases in the product region and the unburned gases deep within the pores of the unburned solid increases. The structure of the deflagration wave during this transition from "conductive" to "convective" burning is likely to correspond to a previously identified intrusive regime associated with higher overpressures. In this intrusive limit, the distributed gas-phase reactions proceed in the vicinity of the solid/gas interface, where surface reactions representing sublimation and pyrolysis occur. In this merged-flame regime, gaseous combustion can then either be confined to the purely gas-phase region beyond the solid surface or, depending on a number of factors, can penetrate inside the unburned porous material. A large-activation-energy analysis of the latter scenario is presented in this work ... |
| Databáze: | OpenAIRE |
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