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dc.contributor.authorKrishna, Yedhu
dc.contributor.authorElbaz, Ayman M.
dc.contributor.authorYue, Yuanfu
dc.contributor.authorMagnotti, Gaetano
dc.date.accessioned2019-07-29T08:00:32Z
dc.date.available2019-07-29T08:00:32Z
dc.date.issued2019-07-10
dc.identifier.citationKrishna, Y., Elbaz, A. M., Yue, Y., & Magnotti, G. (2019). Mole fraction measurement through a transparent quarl burner using filtered Rayleigh scattering. Applied Optics, 58(20), 5575. doi:10.1364/ao.58.005575
dc.identifier.doi10.1364/AO.58.005575
dc.identifier.urihttp://hdl.handle.net/10754/656215
dc.description.abstractA filtered Rayleigh scattering system is developed and applied to measure the mole fraction of methane in a methane-air swirl flow through a transparent conical quartz quarl. Light scattering from the location where the laser beam is incident on the surface of the quarl is orders of magnitudes larger than Rayleigh scattering from the gas mixture of interest. This diffusive scattering is suppressed using molecular absorption by an iodine cell and using spatial filtering by an optical aperture. Residual stray light accounted for up to 5% of the total signal and had to be removed for accurate measurements. The flow consisted of a nonpremixed mixture of methane and air in the central jet surrounded by a strong swirling air flow. Measurements were conducted at a height of 4 mm from the fuel tube’s exit for six different conditions of the swirl flow to demonstrate the ability of the instrument to study the effects of swirl strength and fuel flow rate on the mixing process. By using a four-leg pulse stretcher to allow higher laser energies in the probe volume, large collection optics and a reference iodine cell to monitor laser wavelength variations, standard deviations of ∼0.006 in air and ∼0.012 in a laminar methane flow were achieved for mole fraction measurements.
dc.description.sponsorshipKing Abdullah University of Science and Technology (KAUST).
dc.publisherThe Optical Society
dc.relation.urlhttps://www.osapublishing.org/abstract.cfm?URI=ao-58-20-5575
dc.rightsArchived with thanks to Applied Optics
dc.titleMole fraction measurement through a transparent quarl burner using filtered Rayleigh scattering
dc.typeArticle
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentMechanical Engineering
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalApplied Optics
dc.rights.embargodate2020-07-10
dc.eprint.versionPost-print
kaust.personKrishna, Yedhu
kaust.personElbaz, Ayman M.
kaust.personYue, Yuanfu
kaust.personMagnotti, Gaetano
dc.date.published-online2019-07-10
dc.date.published-print2019-07-10


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