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Liñán Martínez, Amable and Williams, F.A. (1972). Radiant ignition of a reactive solid with in-depth absorption. "Combustion and Flame", v. 18 ; pp. 85-97. ISSN 0010-2180. https://doi.org/10.1016/S0010-2180(72)80229-3.
Title: | Radiant ignition of a reactive solid with in-depth absorption |
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Author/s: |
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Item Type: | Article |
Título de Revista/Publicación: | Combustion and Flame |
Date: | 1972 |
ISSN: | 0010-2180 |
Volume: | 18 |
Subjects: | |
Faculty: | E.T.S.I. Aeronáuticos (UPM) |
Department: | Motopropulsión y Termofluidodinámica [hasta 2014] |
Creative Commons Licenses: | Recognition - No derivative works - Non commercial |
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An asymptotic analysis of the limit of large activation energy is presented for radiant ignition of a solid that experiences a one-step Arrhenius reaction in the condensed phase. Both constant and time-dependent radiant-energy fluxes arc considered, and the complete range of values is covered for the absorption coefficient ji. It is shown that as » increases, the structure of the transition stage, which follows the inert heat-conduction stage, passes from a thermal explosion without heat conduction, to a single transient heat-conduction zone with distributed chemical heat release, to a two-zone structure composed of a reactive-diffusive-absorptive zone near the surface and a transient-diffusive zone in the interior. For very high values of u, the reactive-diffusive-absorptive zone further splits into a surface absorption zone and an interior reactive-diffusive zone, thereby reproducing results obtained previously for ignition by a surface-applied energy flux. The analysis shows that contrary to earlier expectation, the nondimensional absorption coefficient must be at least as large as the nondimensional activation energy for in-depth absorption to affect the ignition time negligibly.
Item ID: | 1008 |
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DC Identifier: | https://oa.upm.es/1008/ |
OAI Identifier: | oai:oa.upm.es:1008 |
DOI: | 10.1016/S0010-2180(72)80229-3 |
Official URL: | http://www.sciencedirect.com/science/article/pii/S0010218072802293 |
Deposited by: | Archivo Digital UPM |
Deposited on: | 16 May 2008 |
Last Modified: | 17 Jan 2017 08:02 |