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Vázquez Espí, Carlos ORCID: https://orcid.org/0000-0001-9956-3476 and Liñán Martínez, Amable
ORCID: https://orcid.org/0000-0002-6161-8715
(2001).
Fast, non-diffusive ignition of a gaseous reacting
mixture subject to a point energy source.
"Combustion Theory and Modelling", v. 5
;
pp. 485-498.
ISSN 1364-7830.
Title: | Fast, non-diffusive ignition of a gaseous reacting mixture subject to a point energy source |
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Author/s: |
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Item Type: | Article |
Título de Revista/Publicación: | Combustion Theory and Modelling |
Date: | 2001 |
ISSN: | 1364-7830 |
Volume: | 5 |
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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The ignition of a gaseous reactive mixture subject to a localized energy source is analysed using large activation energy asymptotics. The energy released by the source results in a thermal non-uniformity in a small región of the gas. We distinguish two different regimes, on-diffusive and diffusive, depending on the dominant cooling mechanism during the ignition stage: expansión effects or heat conduction. We focus on the non-diffusive ignition, considering the energy source as instantaneous. We show the existence of a critical valué of a Damkohler number, defined as the ratio of the characteristic times of the expansión waves and chemical reaction, such that ignition only occurs for supercritical valúes at a well-defined ignition time, which is calculated numerically. The ignition process for a non-instantaneous energy source is also described in terms of an initial inert heating stage and a shorter reactive stage ending in thermal runaway for supercritical valúes of the Damkohler number.
Item ID: | 1310 |
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DC Identifier: | https://oa.upm.es/1310/ |
OAI Identifier: | oai:oa.upm.es:1310 |
Official URL: | http://www.tandf.co.uk/journals/titles/13647830.as... |
Deposited by: | Biblioteca ETSI Aeronauticos |
Deposited on: | 19 Jan 2009 |
Last Modified: | 20 Apr 2016 06:46 |