Tomographic laser absorption imaging of combustion species and temperature in the mid-wave infrared

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dc.contributor.authorWei, Chuyu
dc.contributor.authorPineda, Daniel I.
dc.contributor.authorGoldenstein, Christopher S.
dc.contributor.authorSpearrin, R. Mitchell
dc.creator.orcidhttps://orcid.org/0000-0001-7259-2226en_US
dc.date.accessioned2023-04-14T16:42:12Z
dc.date.available2023-04-14T16:42:12Z
dc.date.issued2018
dc.description.abstractIn this work, laser absorption spectroscopy techniques are expanded in spatial resolution capability by utilizing a high-speed infrared camera to image flow fields backlit with tunable mid-wave infrared laser radiation. The laser absorption imaging (LAI) method yields spectrally-resolved and spatially-rich datasets from which quantitative species and temperature profiles can be generated using tomographic reconstruction. Access to the mid-wave infrared (3–5 µm) enables imaging of fuels, intermediates, and products of combustion in canonical small-diameter flames (< 1 cm). Example 1D measurements and 2D reconstructions of ethane (3.34 µm), carbon monoxide (4.97 µm), and carbon dioxide (4.19 µm) in an axisymmetric laminar flame are presented and discussed. LAI is shown to significantly enhance spatio-temporal data bandwidth (∼400 simultaneously sampled lines-of-sight) and resolution (∼50 µm) compared to other tomographic absorption spectroscopy techniques, and with a simplified optical arrangement.en_US
dc.description.departmentMechanical Engineeringen_US
dc.description.sponsorshipNational Science Foundationen_US
dc.identifier.citationWei, C., Pineda, D. I., Goldenstein, C. S., & Spearrin, R. M. (2018). Tomographic laser absorption imaging of combustion species and temperature in the mid-wave infrared. Optics Express, 26(16), 20944-20951. doi:10.1364/OE.26.020944en_US
dc.identifier.issn1094-4087
dc.identifier.otherhttps://doi.org/10.1364/OE.26.020944
dc.identifier.urihttps://hdl.handle.net/20.500.12588/1815
dc.language.isoen_USen_US
dc.publisherOptica Publishing Groupen_US
dc.titleTomographic laser absorption imaging of combustion species and temperature in the mid-wave infrareden_US
dc.typeArticleen_US

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