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Sensitivity to change in laminar burning velocity and Markstein length resulting from variable hydrogen fraction in blast furnace gas for changing ambient conditions

Pugh, Daniel, O'Doherty, Timothy, Griffiths, Anthony John, Bowen, Philip John, Crayford, Andrew Philip and Marsh, Richard 2013. Sensitivity to change in laminar burning velocity and Markstein length resulting from variable hydrogen fraction in blast furnace gas for changing ambient conditions. International Journal of Hydrogen Energy 38 (8) , pp. 3459-3470. 10.1016/j.ijhydene.2012.12.081

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Abstract

The sensitivity to changes in fuel characteristics has been investigated for combustion of Blast Furnace Gas resulting from small volumetric increases in H2 concentration. A nonlinear methodology has been employed to quantify unstretched flame speeds and the effect of flame stretch from outwardly propagating spherical flames. Following benchmarking work with CH4, results were obtained under ambient conditions of 303 K and 0.1 MPa, with small absolute change in hydrogen concentration shown to at least triple the laminar burning velocity for all tested mixtures. Fuel composition and equivalence ratio were shown to independently influence mixture diffusivity and Lewis number, quantified by change in the obtained values of Markstein length. Temperature and pressure were increased to respective values of 393 K and 0.2 MPa to investigate influence of ambient conditions, with a power law correlation presented. Finally the performance of several published chemical reaction mechanisms has been evaluated through comparison of 1-D flame models.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Uncontrolled Keywords: Hydrogen flame speed sensitivity; Blast furnace gas; Laminar burning velocity; Flame stretch; Chemical kinetic modelling
Publisher: Elsevier
ISSN: 0360-3199
Last Modified: 12 Sep 2018 21:37
URI: http://orca.cf.ac.uk/id/eprint/43017

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