Thermal-diffusive ignition and flame initiation by a local energy source

Vázquez Espí, Carlos and Liñán Martínez, Amable (2002). Thermal-diffusive ignition and flame initiation by a local energy source. "Combustion Theory and Modelling", v. 6 ; pp. 297-315. ISSN 1364-7830.

Description

Title: Thermal-diffusive ignition and flame initiation by a local energy source
Author/s:
  • Vázquez Espí, Carlos
  • Liñán Martínez, Amable
Item Type: Article
Título de Revista/Publicación: Combustion Theory and Modelling
Date: 29 April 2002
ISSN: 1364-7830
Volume: 6
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

The ignition and flame initiation in a gaseous reacting mixture subject to a local source of thermal energy is analysed by means of large activation energy asymptotics. The ignition transient is assumed to be long enough for heat conduction to be the dominant cooling mechanism. We show the existence of a critical valué of the Damkóhler number, defined as the ratio of appropriate characteristic times of conduction and chemical reaction, such that ignition only occurs for supercritical valúes. Additional conditions are required to ensure self-propagation of a flame after ignition. These are obtained, with the thermal-diffusive model, for a source of energy represented by an instantaneous point, line or planar source. The analysis, involving an unsteady free-boundary problem, shows that the initial flame kernel evolves to a self-propagating fíame only if the energy released by the source is greater than a critical valué

More information

Item ID: 1330
DC Identifier: http://oa.upm.es/1330/
OAI Identifier: oai:oa.upm.es:1330
Official URL: http://www.tandf.co.uk/journals/titles/13647830.asp
Deposited by: Biblioteca ETSI Aeronauticos
Deposited on: 22 Jan 2009
Last Modified: 20 Apr 2016 06:47
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