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dc.contributor.authorGray, Joshua A.T.
dc.contributor.authorLacoste, Deanna
dc.date.accessioned2018-11-07T07:38:45Z
dc.date.available2018-11-07T07:38:45Z
dc.date.issued2018-11-02
dc.identifier.citationGray JAT, Lacoste DA (2019) Enhancement of the transition to detonation of a turbulent hydrogen–air flame by nanosecond repetitively pulsed plasma discharges. Combustion and Flame 199: 258–266. Available: http://dx.doi.org/10.1016/j.combustflame.2018.10.023.
dc.identifier.issn0010-2180
dc.identifier.doi10.1016/j.combustflame.2018.10.023
dc.identifier.urihttp://hdl.handle.net/10754/629608
dc.description.abstractThis work provides proof of concept for the use of nanosecond repetitively pulsed (NRP) plasma discharges to accelerate a propagating turbulent flame, resulting in enhanced deflagration-to-detonation transition and significant reduction in run-up length. The investigations are conducted on a stoichiometric hydrogen-air mixture at near ambient conditions. The effect of plasma actuation on the flame velocity is investigated using time-of-flight measurements of the propagating flame and detonation wave. The flame velocity shortly after the application of the NRP plasma discharges is more than double that obtained in cases in which no plasma is applied. High-speed imaging of OH* chemiluminescence in the electrode area confirms this result and provides insight about the mechanisms of plasma action. While the volumetric energy deposited during plasma actuation is sufficiently low as to not ignite the combustible mixture prior the arrival of the flame, the chemical and thermal enhancement of the gas is efficient enough to significantly accelerate the transition to detonation. The decrease in the run-up length to transition to detonation is obtained for a plasma power of less than 0.14% of the thermal power of the flame. This result indicates that low-energy active devices using NRP discharges might be suitable for replacing passive devices such as orifice plates or Shchelkin spirals.
dc.description.sponsorshipThis work is funded by the Center of Competitive Funding from King Abdullah University of Science and Technology (Grant Number 1975).
dc.publisherElsevier BV
dc.relation.urlhttps://www.sciencedirect.com/science/article/pii/S0010218018304504
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Combustion and Flame. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Combustion and Flame, [, , (2018-11-02)] DOI: 10.1016/j.combustflame.2018.10.023 . © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectDeflagration-to-detonation transition
dc.subjectPlasma-assisted combustion
dc.subjectNon-equilibrium plasma
dc.subjectFlame acceleration
dc.titleEnhancement of the transition to detonation of a turbulent hydrogen–air flame by nanosecond repetitively pulsed plasma discharges
dc.typeArticle
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalCombustion and Flame
dc.eprint.versionPost-print
kaust.personGray, Joshua A.T.
kaust.personLacoste, Deanna
kaust.grant.number1975
refterms.dateFOA2018-11-07T07:41:07Z
dc.date.published-online2018-11-02
dc.date.published-print2019-01


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