Measurements of equivalence ratio flucutaitons in a lean premixed gas turbine combustor using an IR absorption technique

Hyung Ju Lee, Kyu Tae Kim, Jong Guen Lee, Bryan D. Quay, Domenic A. Santavicca

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

    Abstract

    An experimental study was conducted to estimate and confirm equivalence ratio fluctuations at the inlet of a lean premixed gas turbine combustor. Fuel injectors were placed at several locations in the mixing section of the combustor, in order to produce different instability characteristics due to the equivalence ratio fluctuations. An IR absorption technique was used to measure the equivalence ratio fluctuations at the inlet of the dump combustor. The measured IR signals were processed in two different ways and the results were compared to confirm the two calibrated equivalence ratio signals. The processed data showed that the two processing methods gave very similar results, and the phase of the measured equivalence ratio fluctuations at the combustor inlet by the IR absorption technique agreed well with that of equivalence ratio fluctuations predicted by time lags in the mixing section. It was, however, not possible to accurately predict the magnitude of the equivalence ratio fluctuations at the combustor inlet by the time lag analysis because the equivalence ratio fluctuations generataed at the fuel injection location is changed by mixing and diffusion as the fuel is convected through the combustor.

    Original languageEnglish (US)
    Title of host publicationASME Turbo Expo 2010
    Subtitle of host publicationPower for Land, Sea, and Air, GT 2010
    Pages1137-1146
    Number of pages10
    EditionPARTS A AND B
    DOIs
    StatePublished - Dec 1 2010
    EventASME Turbo Expo 2010: Power for Land, Sea, and Air, GT 2010 - Glasgow, United Kingdom
    Duration: Jun 14 2010Jun 18 2010

    Publication series

    NameProceedings of the ASME Turbo Expo
    NumberPARTS A AND B
    Volume2

    Other

    OtherASME Turbo Expo 2010: Power for Land, Sea, and Air, GT 2010
    CountryUnited Kingdom
    CityGlasgow
    Period6/14/106/18/10

    All Science Journal Classification (ASJC) codes

    • Engineering(all)

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  • Cite this

    Lee, H. J., Kim, K. T., Lee, J. G., Quay, B. D., & Santavicca, D. A. (2010). Measurements of equivalence ratio flucutaitons in a lean premixed gas turbine combustor using an IR absorption technique. In ASME Turbo Expo 2010: Power for Land, Sea, and Air, GT 2010 (PARTS A AND B ed., pp. 1137-1146). (Proceedings of the ASME Turbo Expo; Vol. 2, No. PARTS A AND B). https://doi.org/10.1115/GT2010-23424