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Joulin, G and Kurdyumov, V. and Liñán Martínez, Amable (1999). Existence conditions and drift velocities of adiabatic flame-balls in weak gravity fields. "Combustion Theory and Modelling", v. 3 ; pp. 281-296. ISSN 1364-7830.
Title: | Existence conditions and drift velocities of adiabatic flame-balls in weak gravity fields |
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Author/s: |
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Item Type: | Article |
Título de Revista/Publicación: | Combustion Theory and Modelling |
Date: | 1999 |
ISSN: | 1364-7830 |
Volume: | 3 |
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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Combining activation energy asymptotics, suitable scalings and numerical methods, we study how flame-balls move under the action of the free convection that they themselves generate in the presence of a weak, uniform gravity field. Attention is focused on steady configurations (in a suitable reference frame), on an isolated flame-ball of size comparable to what is obtained in the absence of gravity, and on deficient reactants that are characterized by a low Lewis number. For the sake of simplicity, we consider an adiabatic combustion process, in the sense that the radiative exchanges are neglected. This work provides one with:
(a) a description of the free-convection field around the flame-ball, along with an asymptotic estimate of the drift velocity;
(b) a relationship between the flame-ball radius, strength of gravity and physico-chemical properties of the reactive premixture;
(c) extinction conditions, caused by the net effect of heat extraction from the flame-ball to its surroundings by the free-convection field.
Hints on generalizations currently under consideration are also given.
Item ID: | 1307 |
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DC Identifier: | https://oa.upm.es/1307/ |
OAI Identifier: | oai:oa.upm.es:1307 |
Official URL: | http://www.tandf.co.uk/journals/titles/13647830.as... |
Deposited by: | Biblioteca ETSI Aeronauticos |
Deposited on: | 18 Jan 2009 |
Last Modified: | 20 Apr 2016 06:46 |