Tangential stretching rate (TSR) analysis of non premixed reactive flows

Handle URI:
http://hdl.handle.net/10754/623603
Title:
Tangential stretching rate (TSR) analysis of non premixed reactive flows
Authors:
Valorani, Mauro ( 0000-0002-8260-6297 ) ; Ciottoli, Pietro Paolo; Galassi, Riccardo Malpica
Abstract:
We discuss how the Tangential stretching rate (TSR) analysis, originally developed and tested for spatially homogeneous systems (batch reactors), is extended to spatially non homogeneous systems. To illustrate the effectiveness of the TSR diagnostics, we study the ignition transient in a non premixed, reaction–diffusion model in the mixture fraction space, whose dependent variables are temperature and mixture composition. The reactive mixture considered is syngas/air. A detailed H2/CO mechanism with 12 species and 33 chemical reactions is employed. We will discuss two cases, one involving only kinetics as a model of front propagation purely driven by spontaneous ignition, the other as a model of deflagration wave involving kinetics/diffusion coupling. We explore different aspects of the system dynamics such as the relative role of diffusion and kinetics, the evolution of kinetic eigenvalues, and of the tangential stretching rates computed by accounting for the combined action of diffusion and kinetics as well for kinetics only. We propose criteria based on the TSR concept which allow to identify the most ignitable conditions and to discriminate between spontaneous ignition and deflagration front.
Citation:
Valorani M, Ciottoli PP, Galassi RM (2017) Tangential stretching rate (TSR) analysis of non premixed reactive flows. Proceedings of the Combustion Institute 36: 1357–1367. Available: http://dx.doi.org/10.1016/j.proci.2016.09.008.
Publisher:
Elsevier BV
Journal:
Proceedings of the Combustion Institute
Issue Date:
16-Oct-2016
DOI:
10.1016/j.proci.2016.09.008
Type:
Article
ISSN:
1540-7489
Sponsors:
This work was support was CCRC/KAUST 1975--03 CCF Subaward Agreement.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorValorani, Mauroen
dc.contributor.authorCiottoli, Pietro Paoloen
dc.contributor.authorGalassi, Riccardo Malpicaen
dc.date.accessioned2017-05-15T10:35:10Z-
dc.date.available2017-05-15T10:35:10Z-
dc.date.issued2016-10-16en
dc.identifier.citationValorani M, Ciottoli PP, Galassi RM (2017) Tangential stretching rate (TSR) analysis of non premixed reactive flows. Proceedings of the Combustion Institute 36: 1357–1367. Available: http://dx.doi.org/10.1016/j.proci.2016.09.008.en
dc.identifier.issn1540-7489en
dc.identifier.doi10.1016/j.proci.2016.09.008en
dc.identifier.urihttp://hdl.handle.net/10754/623603-
dc.description.abstractWe discuss how the Tangential stretching rate (TSR) analysis, originally developed and tested for spatially homogeneous systems (batch reactors), is extended to spatially non homogeneous systems. To illustrate the effectiveness of the TSR diagnostics, we study the ignition transient in a non premixed, reaction–diffusion model in the mixture fraction space, whose dependent variables are temperature and mixture composition. The reactive mixture considered is syngas/air. A detailed H2/CO mechanism with 12 species and 33 chemical reactions is employed. We will discuss two cases, one involving only kinetics as a model of front propagation purely driven by spontaneous ignition, the other as a model of deflagration wave involving kinetics/diffusion coupling. We explore different aspects of the system dynamics such as the relative role of diffusion and kinetics, the evolution of kinetic eigenvalues, and of the tangential stretching rates computed by accounting for the combined action of diffusion and kinetics as well for kinetics only. We propose criteria based on the TSR concept which allow to identify the most ignitable conditions and to discriminate between spontaneous ignition and deflagration front.en
dc.description.sponsorshipThis work was support was CCRC/KAUST 1975--03 CCF Subaward Agreement.en
dc.publisherElsevier BVen
dc.subjectIgnitionen
dc.subjectChemical kineticsen
dc.subjectComputational singular perturbationen
dc.subjectTangential stretching rateen
dc.titleTangential stretching rate (TSR) analysis of non premixed reactive flowsen
dc.typeArticleen
dc.identifier.journalProceedings of the Combustion Instituteen
dc.contributor.institutionMechanical and Aerospace Engineering Department, Sapienza University of Rome, Via Eudossiana, 18, Rome 00184, Italyen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.