Characteristics of Syngas Auto-ignition at High Pressure and Low Temperature Conditions with Thermal Inhomogeneities

Handle URI:
http://hdl.handle.net/10754/556643
Title:
Characteristics of Syngas Auto-ignition at High Pressure and Low Temperature Conditions with Thermal Inhomogeneities
Authors:
Pal, Pinaki; Mansfield, Andrew B.; Wooldridge, Margaret S.; Im, Hong G. ( 0000-0001-7080-1266 )
Abstract:
Effects of thermal inhomogeneities on syngas auto-ignition at high-pressure low-temperature conditions, relevant to gas turbine operation, are investigated using detailed one-dimensional numerical simulations. Parametric tests are carried out for a range of thermodynamic conditions (T = 890-1100 K, P = 3-20 atm) and composition (Ф = 0.1, 0.5). Effects of global thermal gradients and localized thermal hot spots are studied. In the presence of a thermal gradient, the propagating reaction front transitions from spontaneous ignition to deflagration mode as the initial mean temperature decreases. The critical mean temperature separating the two distinct auto-ignition modes is computed using a predictive criterion and found to be consistent with front speed and Damkohler number analyses. The hot spot study reveals that compression heating of end-gas mixture by the propagating front is more pronounced at lower mean temperatures, significantly advancing the ignition delay. Moreover, the compression heating effect is dependent on the domain size.
KAUST Department:
Clean Combustion Research Center
Citation:
Characteristics of Syngas Auto-ignition at High Pressure and Low Temperature Conditions with Thermal Inhomogeneities 2015, 66:1 Energy Procedia
Journal:
Energy Procedia
Issue Date:
31-May-2015
DOI:
10.1016/j.egypro.2015.02.003
Type:
Article
ISSN:
18766102
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S1876610215001034
Appears in Collections:
Articles; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorPal, Pinakien
dc.contributor.authorMansfield, Andrew B.en
dc.contributor.authorWooldridge, Margaret S.en
dc.contributor.authorIm, Hong G.en
dc.date.accessioned2015-06-10T11:16:48Zen
dc.date.available2015-06-10T11:16:48Zen
dc.date.issued2015-05-31en
dc.identifier.citationCharacteristics of Syngas Auto-ignition at High Pressure and Low Temperature Conditions with Thermal Inhomogeneities 2015, 66:1 Energy Procediaen
dc.identifier.issn18766102en
dc.identifier.doi10.1016/j.egypro.2015.02.003en
dc.identifier.urihttp://hdl.handle.net/10754/556643en
dc.description.abstractEffects of thermal inhomogeneities on syngas auto-ignition at high-pressure low-temperature conditions, relevant to gas turbine operation, are investigated using detailed one-dimensional numerical simulations. Parametric tests are carried out for a range of thermodynamic conditions (T = 890-1100 K, P = 3-20 atm) and composition (Ф = 0.1, 0.5). Effects of global thermal gradients and localized thermal hot spots are studied. In the presence of a thermal gradient, the propagating reaction front transitions from spontaneous ignition to deflagration mode as the initial mean temperature decreases. The critical mean temperature separating the two distinct auto-ignition modes is computed using a predictive criterion and found to be consistent with front speed and Damkohler number analyses. The hot spot study reveals that compression heating of end-gas mixture by the propagating front is more pronounced at lower mean temperatures, significantly advancing the ignition delay. Moreover, the compression heating effect is dependent on the domain size.en
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S1876610215001034en
dc.rightsArchived with thanks to Energy Procedia, Under a Creative Commons license http://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectStrong and weak ignitionen
dc.subjectSpontaneous ignitionen
dc.subjectDeflagrationen
dc.subjectAuto-ignitionen
dc.subjectSyngasen
dc.titleCharacteristics of Syngas Auto-ignition at High Pressure and Low Temperature Conditions with Thermal Inhomogeneitiesen
dc.typeArticleen
dc.contributor.departmentClean Combustion Research Centeren
dc.identifier.journalEnergy Procediaen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDepartment of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109, United Statesen
dc.contributor.institutionDepartment of Aerospace Engineering, University of Michigan, Ann Arbor, MI 48109, United Statesen
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