Critical conditions for carbon combustion

Treviño, César and Higuera Antón, Francisco and Liñán Martínez, Amable (1986). Critical conditions for carbon combustion. In: "21st Symposium (International) on Combustion", 3-8 Ago 1986, West Germany. ISBN 0008207843.

Description

Title: Critical conditions for carbon combustion
Author/s:
  • Treviño, César
  • Higuera Antón, Francisco
  • Liñán Martínez, Amable
Item Type: Presentation at Congress or Conference (Article)
Event Title: 21st Symposium (International) on Combustion
Event Dates: 3-8 Ago 1986
Event Location: West Germany
Title of Book: Twenty-first Symposium (International) on Combustion
Date: 1986
ISBN: 0008207843
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 critical conditions for vigorous burning of spherical carbón partióles are derived using asymptotic techniques for large Zel'dovich numbers. The particle liíetime and the temperature history are obtained for both supercritical and subcritical regimes, when a carbón particle is suddenly exposed to a stagnant high temperature oxidizing atmosphere. For Damkóhler numbers below a critical number, that is, the subcritical regime, slow burning oceurs in the carbón particle. That means that throughout the life of the particle, the chemical reaction is controlled by kinetics. In this regime, the lifetime is extremely long. On the other hand, for Damkóhler numbers above the critical one, the process ends with a rapid increase of temperature finally reaching a reaction controlled by diffusion. In this supercritical regime, the life is relativelv short. For valúes of the reduced Damkóhler number very cióse to the critical one, a Ricatti equadon is derived for the non-dimensional temperature of the particle, the solution of which defines whether the particle undergoes subcritical or supercritical behavior.

More information

Item ID: 1292
DC Identifier: http://oa.upm.es/1292/
OAI Identifier: oai:oa.upm.es:1292
Deposited by: Biblioteca ETSI Aeronauticos
Deposited on: 21 Apr 2009
Last Modified: 20 Apr 2016 06:46
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