Simulations of planar non-thermal plasma assisted ignition at atmospheric pressure

Handle URI:
http://hdl.handle.net/10754/622334
Title:
Simulations of planar non-thermal plasma assisted ignition at atmospheric pressure
Authors:
Casey, Tiernan A.; Han, Jie ( 0000-0002-6176-8684 ) ; Belhi, Memdouh ( 0000-0003-4307-4950 ) ; Arias, Paul G.; Bisetti, Fabrizio ( 0000-0001-5162-7805 ) ; Im, Hong G. ( 0000-0001-7080-1266 ) ; Chen, Jyh Yuan
Abstract:
The opportunity for ignition assistance by a pulsed applied voltage is investigated in a canonical one-dimensional configuration. An incipient ignition kernel, formed by localized energy deposition into a lean mixture of methane and air at atmospheric pressure, is subjected to sub-breakdown electric fields (E/N ≈ 100 Td) by a DC potential applied across the domain, resulting in non-thermal behavior of the plasma formed during the discharge. A two-fluid approach is employed to couple thermal neutrals and ions to the non-thermal electrons. A two-temperature plasma mechanism describing gas phase combustion, excitation of neutral species, and high-energy electron kinetics is employed to account for non-thermal effects. Charged species transported from the ignition zone drift rapidly through the domain, augmenting the magnitude of the electric field in the fresh gas during the pulse through a dynamic-electrode effect, which results in an increase in the energy of the electrons in the fresh mixture with increasing time. Enhanced fuel and oxidizer decomposition due to electron impact dissociation and interaction with excited neutrals generate a pool of radicals, mostly O and H, in the fresh gas ahead of the flame's preheat zone. In the configuration considered, the effect of the nanosecond pulse is to increase the mass of fuel burned at equivalent times relative to the unsupported ignition through enhanced radical generation, resulting in an increased heat release rate in the immediate aftermath of the pulse.
KAUST Department:
Clean Combustion Research Center
Citation:
Casey TA, Han J, Belhi M, Arias PG, Bisetti F, et al. (2016) Simulations of planar non-thermal plasma assisted ignition at atmospheric pressure. Proceedings of the Combustion Institute. Available: http://dx.doi.org/10.1016/j.proci.2016.08.083.
Publisher:
Elsevier BV
Journal:
Proceedings of the Combustion Institute
Issue Date:
21-Oct-2016
DOI:
10.1016/j.proci.2016.08.083
Type:
Article
ISSN:
1540-7489
Sponsors:
King Abdullah University of Science and Technology; National Science Foundation[CBET-1510709]
Appears in Collections:
Articles; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorCasey, Tiernan A.en
dc.contributor.authorHan, Jieen
dc.contributor.authorBelhi, Memdouhen
dc.contributor.authorArias, Paul G.en
dc.contributor.authorBisetti, Fabrizioen
dc.contributor.authorIm, Hong G.en
dc.contributor.authorChen, Jyh Yuanen
dc.date.accessioned2017-01-02T09:08:26Z-
dc.date.available2017-01-02T09:08:26Z-
dc.date.issued2016-10-21en
dc.identifier.citationCasey TA, Han J, Belhi M, Arias PG, Bisetti F, et al. (2016) Simulations of planar non-thermal plasma assisted ignition at atmospheric pressure. Proceedings of the Combustion Institute. Available: http://dx.doi.org/10.1016/j.proci.2016.08.083.en
dc.identifier.issn1540-7489en
dc.identifier.doi10.1016/j.proci.2016.08.083en
dc.identifier.urihttp://hdl.handle.net/10754/622334-
dc.description.abstractThe opportunity for ignition assistance by a pulsed applied voltage is investigated in a canonical one-dimensional configuration. An incipient ignition kernel, formed by localized energy deposition into a lean mixture of methane and air at atmospheric pressure, is subjected to sub-breakdown electric fields (E/N ≈ 100 Td) by a DC potential applied across the domain, resulting in non-thermal behavior of the plasma formed during the discharge. A two-fluid approach is employed to couple thermal neutrals and ions to the non-thermal electrons. A two-temperature plasma mechanism describing gas phase combustion, excitation of neutral species, and high-energy electron kinetics is employed to account for non-thermal effects. Charged species transported from the ignition zone drift rapidly through the domain, augmenting the magnitude of the electric field in the fresh gas during the pulse through a dynamic-electrode effect, which results in an increase in the energy of the electrons in the fresh mixture with increasing time. Enhanced fuel and oxidizer decomposition due to electron impact dissociation and interaction with excited neutrals generate a pool of radicals, mostly O and H, in the fresh gas ahead of the flame's preheat zone. In the configuration considered, the effect of the nanosecond pulse is to increase the mass of fuel burned at equivalent times relative to the unsupported ignition through enhanced radical generation, resulting in an increased heat release rate in the immediate aftermath of the pulse.en
dc.description.sponsorshipKing Abdullah University of Science and Technologyen
dc.description.sponsorshipNational Science Foundation[CBET-1510709]en
dc.publisherElsevier BVen
dc.subjectElectric fielden
dc.subjectIgnitionen
dc.subjectPlasma assisted combustionen
dc.titleSimulations of planar non-thermal plasma assisted ignition at atmospheric pressureen
dc.typeArticleen
dc.contributor.departmentClean Combustion Research Centeren
dc.identifier.journalProceedings of the Combustion Instituteen
dc.contributor.institutionDepartment of Mechanical Engineering, University of California, Berkeley, CA 94720, USAen
dc.contributor.institutionDepartment of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109, USAen
dc.contributor.institutionDepartment of Aerospace Engineering and Engineering Mechanics, University of Texas at Austin, Austin, TX 78712-1085, USAen
kaust.authorHan, Jieen
kaust.authorBelhi, Memdouhen
kaust.authorBisetti, Fabrizioen
kaust.authorIm, Hong G.en
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