Critical slot size for deflagration initiation by hot products discharge into hydrogen air-atmospheres

e-Archivo Repository

Show simple item record Carpio, Jaime Iglesias Estradé, María Inmaculada Vera Coello, Marcos Sánchez, Antonio L. 2022-02-17T12:25:28Z 2022-02-17T12:25:28Z 2017-01-12
dc.identifier.bibliographicCitation Carpio, J., Iglesias, I., Vera, M. & Sánchez, A. L. (2017). Critical slot size for deflagration initiation by hot products discharge into hydrogen–air atmospheres. International Journal of Hydrogen Energy, 42(2), 1298–1305.
dc.identifier.issn 0360-3199
dc.description.abstract This computational study addresses deflagration initiation of lean, stoichiometric, and moderately rich hydrogen air mixtures by the sudden discharge of a hot planar jet of its adiabatic combustion products. The objective is to determine the minimum slot size required for ignition, a relevant quantity of interest for safety and technological applications concerning the accidental ignition of hydrogen. For sufficiently small jet velocities, the numerical solution of the problem requires integration of the two-dimensional Navier Stokes equations for chemically reacting ideal-gas mixtures, supplemented by standard descriptions of the molecular transport terms and a reduced chemical kinetic mechanism suitable for hydrogen air combustion. The computations provide the variation of the critical slot size for hot-jet ignition with both the jet Reynolds number and the equivalence ratio of the mixture. In particular, it is seen that, while the Reynolds number exerts only a relatively weak effect on the ignition process, the influence of the equivalence ratio is much more pronounced, with the smallest slot widths found for stoichiometric or slightly rich conditions. The numerical results show three different ignition modes, with the flame developing from a clearly identified ignition kernel located either at the core of the leading vortex pair (mode 1), at the symmetry plane near the leading edge of the starting jet (mode 2), or at the jet stem connecting the jet exit with the starting vortex (mode 3).
dc.description.sponsorship This work has been funded by projects MTM2015-67030-P, ENE2015-68703-C2-1-R, and CSD2010-00011 (CONSOLIDER-INGENIO) of the Spanish Ministerio de Economía y Competitividad. Fruitful discussions with Prof. Amable Liñán are gratefully acknowledged.
dc.format.extent 8
dc.language.iso eng
dc.publisher Elsevier
dc.rights © 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
dc.rights Atribución-NoComercial-SinDerivadas 3.0 España
dc.subject.other Deflagration initiation
dc.subject.other Hydrogen-air mixtures
dc.subject.other Hot-jet ignition
dc.subject.other Transient jets
dc.subject.other Finite element method
dc.title Critical slot size for deflagration initiation by hot products discharge into hydrogen air-atmospheres
dc.type article
dc.subject.eciencia Ingeniería Mecánica
dc.rights.accessRights openAccess
dc.relation.projectID Gobierno de España. CSD2010-00011
dc.relation.projectID Gobierno de España. ENE2015-68703-C2-1-R
dc.relation.projectID Gobierno de España. MTM2015-67030-P
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 1298
dc.identifier.publicationissue 2
dc.identifier.publicationlastpage 1305
dc.identifier.publicationtitle International Journal of Hydrogen Energy
dc.identifier.publicationvolume 42
dc.identifier.uxxi AR/0000019534
dc.contributor.funder Ministerio de Economía y Competitividad (España)
 Find Full text

Files in this item

*Click on file's image for preview. (Embargoed files's preview is not supported)

The following license files are associated with this item:

This item appears in the following Collection(s)

Show simple item record