Radiant ignition of a reactive solid with in-depth absorption

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.

Description

Title: Radiant ignition of a reactive solid with in-depth absorption
Author/s:
  • Liñán Martínez, Amable
  • Williams, F.A.
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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Abstract

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.

More information

Item ID: 1008
DC Identifier: http://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
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