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dc.contributor.authorFigueroa Labastida, Miguel
dc.contributor.authorBadra, Jihad
dc.contributor.authorFarooq, Aamir
dc.date.accessioned2020-07-23T09:15:45Z
dc.date.available2020-07-23T09:15:45Z
dc.date.issued2020-07-17
dc.date.submitted2020-04-18
dc.identifier.citationFigueroa-Labastida, M., Badra, J., & Farooq, A. (2020). Dual-camera high-speed imaging of the ignition modes of ethanol, methanol and n-hexane in a shock tube. Combustion and Flame. doi:10.1016/j.combustflame.2020.07.002
dc.identifier.issn1556-2921
dc.identifier.issn0010-2180
dc.identifier.doi10.1016/j.combustflame.2020.07.002
dc.identifier.urihttp://hdl.handle.net/10754/664377
dc.description.abstractShock tubes are used as homogeneous batch reactors to measure ignition delay times, reaction rate coefficients and species time-histories of a variety of chemical systems. Any non-ideality or inhomogeneity in the shock tube experiment would affect the quality and usefulness of measured data. Experimental and computational efforts have previously been carried out to characterize the regimes of ideal operation of shock tubes. High-speed imaging has proven to be a highly useful tool to assess ignition homogeneity. In this work, a dual-camera setup has been used with an optical end-section in a circular shock tube to obtain simultaneous high-speed images from the shock tube endwall and sidewall, thus providing visualization of the ignition phenomenon in three dimensions. Two case studies are presented herein to demonstrate the quality of data and insights that are obtained using this diagnostic technique to study the ignition modes of different fuels. The first is a comparison of the ignition of two alternative fuels, methanol and ethanol, and the second is a study of the ignition dependence on the fuel concentration of a representative paraffinic fuel, n-hexane. The unique dual-camera imaging diagnostic enabled deeper insights into the ignition homogeneity, with all fuels exhibiting localized ignition at low temperatures. Methanol showed a higher propensity than ethanol to ignite far from the endwall, and the high concentration of n-hexane led to inhomogeneous ignition.
dc.description.sponsorshipThe paper is based on work supported by Saudi Aramco Research and Development Center FUELCOM program under Master Research Agreement Number 6600024505/01. FUELCOM (Fuel Combustion for Advanced Engines) is a collaborative research undertaking between Saudi Aramco and KAUST intended to address the fundamental aspects of hydrocarbon fuel combustion in engines, and develop fuel/engine design tools suitable for advanced combustion modes.
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S0010218020302649
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, [, , (2020-07-17)] DOI: 10.1016/j.combustflame.2020.07.002 . © 2020. 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.titleDual-camera high-speed imaging of the ignition modes of ethanol, methanol and n-hexane in a shock tube
dc.typeArticle
dc.contributor.departmentChemical Kinetics & Laser Sensors Laboratory
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
dc.contributor.institutionFuel Technology Division, R&DC, Saudi Aramco, Dhahran, Saudi Arabia
kaust.personFigueroa Labastida, Miguel
kaust.personFarooq, Aamir
dc.date.accepted2020-07-01
dc.identifier.eid2-s2.0-85087943812
refterms.dateFOA2020-07-26T05:55:57Z
dc.date.published-online2020-07-17
dc.date.published-print2020-07


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