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Fernández Tarrazo, Eduardo, Sánchez Pérez, Antonio Luis, Liñán Martínez, Amable ORCID: https://orcid.org/0000-0002-6161-8715 and Williams, F.A.
(2006).
A simple one-step chemistry model for partially premixed hydrocarbon combustion.
"Combustion and Flame", v. 147
(n. 1-2);
pp. 32-38.
ISSN 0010-2180.
Title: | A simple one-step chemistry model for partially premixed hydrocarbon combustion |
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Author/s: |
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Item Type: | Article |
Título de Revista/Publicación: | Combustion and Flame |
Date: | October 2006 |
ISSN: | 0010-2180 |
Volume: | 147 |
Subjects: | |
Freetext Keywords: | Arrhenius kinetics; Model chemistry; Partially premixed combustion |
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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This work explores the applicability of one-step irreversible Arrhenius kinetics with unity reaction order to the numerical description of partially premixed hydrocarbon combustion. Computations of planar premixed flames are used in the selection of the three model parameters: the heat of reaction q, the activation temperature Ta, and the preexponential factor B. It is seen that changes in q with equivalence ratio φ{symbol} need to be introduced in fuel-rich combustion to describe the effect of partial fuel oxidation on the amount of heat released, leading to a universal linear variation q (φ{symbol}) for φ{symbol} > 1 for all hydrocarbons. The model also employs a variable activation temperature Ta (φ{symbol}) to mimic changes in the underlying chemistry in rich and very lean flames. The resulting chemistry description is able to reproduce propagation velocities of diluted and undiluted flames accurately over the whole flammability limit. Furthermore, computations of methane-air counterflow diffusion flames are used to test the proposed chemistry under nonpremixed conditions. The model not only predicts the critical strain rate at extinction accurately but also gives near-extinction flames with oxygen leakage, thereby overcoming known predictive limitations of one-step Arrhenius kinetics.
Item ID: | 856 |
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DC Identifier: | https://oa.upm.es/856/ |
OAI Identifier: | oai:oa.upm.es:856 |
Official URL: | http://www.sciencedirect.com/science/journal/00102... |
Deposited by: | Archivo Digital UPM |
Deposited on: | 13 Feb 2008 |
Last Modified: | 20 Apr 2016 06:34 |