3-D chemiluminescence imaging of unforced and forced swirl-stabilized flames in a lean premixed multi-nozzle can combustor

Janith Samarasinghe, Stephen Peluso, Michael Szedlmayer, Alexander De Rosa, Bryan Quay, Domenic Santavicca

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    6 Scopus citations

    Abstract

    A tomographic image reconstruction technique has been developed to measure the 3-D distribution of CH* chemiluminescence of unforced and forced turbulent premixed flames. Measurements are obtained in a lean premixed, swirl-stabilized multi-nozzle can combustor. Line-of-sight images are acquired at equally spaced angle increments using a single ICCD camera. 3-D images of the flames are reconstructed by applying a filtered back projection algorithm to the acquired line-of-sight images. Methods of viewing 3-D images to characterize the structure, dynamics, interaction and spatial differences of multi-nozzle flames are presented. Accuracy of the reconstruction technique is demonstrated by comparing reconstructed line-of-sight images to measured line-of-sight downstream-view images of unforced flames. The effect of the number of acquired projection images on the quality of the reconstruction is assessed. The reconstructed 3-D images of the unforced multi-nozzle flames show the structure of individual flames as well as the interaction regions between flames. Forced flame images are obtained by phase-synchronizing the camera to the forcing cycle. The resulting 3-D reconstructions of forced flames reveal the spatial and temporal response of the multi-nozzle flame structure to imposed velocity fluctuations, information which is essential to identifying the underlying mechanisms responsible for this behavior.

    Original languageEnglish (US)
    Title of host publicationASME Turbo Expo 2013
    Subtitle of host publicationTurbine Technical Conference and Exposition, GT 2013
    DOIs
    StatePublished - Dec 17 2013
    EventASME Turbo Expo 2013: Turbine Technical Conference and Exposition, GT 2013 - San Antonio, Tx, United States
    Duration: Jun 3 2013Jun 7 2013

    Publication series

    NameProceedings of the ASME Turbo Expo
    Volume1 B

    Other

    OtherASME Turbo Expo 2013: Turbine Technical Conference and Exposition, GT 2013
    CountryUnited States
    CitySan Antonio, Tx
    Period6/3/136/7/13

    All Science Journal Classification (ASJC) codes

    • Engineering(all)

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