Comparison between self-excited and forced flame response of an industrial lean premixed gas turbine injector

Stephen Peluso, Bryan D. Quay, Jong Guen Lee, Domenic A. Santavicca

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

    3 Scopus citations

    Abstract

    An experimental study was conducted to compare the relationship between self-excited and forced flame response in a variable-length lean premixed gas turbine (LPGT) research combustor with a single industrial injector. The variable-length combustor was used to determine the range of preferred instability frequencies for a given operating condition. Flame stability was classified based on combustor dynamic pressure measurements. Particle velocity perturbations in the injector barrel were calculated from additional dynamic pressure measurements using the two-microphone technique. Global CH* chemiluminescence emission was used as a marker for heat release. The flame's response (i.e. normalized heat release fluctuation divided by normalized velocity fluctuation) was characterized during self-excited instabilities. The variable-length combustor was then used to tune the system to produce a stable flame at the same operating condition and velocity perturbations of varying magnitudes were generated using an upstream air-fuel mixture siren. Heat release perturbations were measured and the flame transfer function was calculated as a function of inlet velocity perturbation magnitude. For cases in this study, the gain and phase between velocity and heat release perturbations agreed for both self-excited and forced measurements in the linear and nonlinear flame response regimes, validating the use of forcing measurements to measure flame response to velocity perturbations. Analysis of the self-excited flame response indicates the saturation mechanism responsible for finite limit amplitude perturbations may result from nonlinear driving or damping processes in the combustor.

    Original languageEnglish (US)
    Title of host publicationASME 2011 Turbo Expo
    Subtitle of host publicationTurbine Technical Conference and Exposition, GT2011
    Pages927-937
    Number of pages11
    EditionPARTS A AND B
    DOIs
    StatePublished - Dec 1 2011
    EventASME 2011 Turbo Expo: Turbine Technical Conference and Exposition, GT2011 - Vancouver, BC, Canada
    Duration: Jun 6 2011Jun 10 2011

    Publication series

    NameProceedings of the ASME Turbo Expo
    NumberPARTS A AND B
    Volume2

    Other

    OtherASME 2011 Turbo Expo: Turbine Technical Conference and Exposition, GT2011
    CountryCanada
    CityVancouver, BC
    Period6/6/116/10/11

    All Science Journal Classification (ASJC) codes

    • Engineering(all)

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