Effect of pilot flame on flame macrostructure and combustion instability

Jihang Li, Stephen Peluso, Bryan Quay, Domenic Santavicca, James Blust, Sriram Nivasan

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

    1 Scopus citations

    Abstract

    The effect of a pilot flame on the dynamic stability characteristics of a single-nozzle lean-premixed swirl combustor operating on natural gas fuel is investigated. Experiments are performed at a fixed inlet temperature and inlet velocity over a broad range of overall fuel-lean equivalence ratios with varied amounts of pilot fuel. The stability results are presented in the form of a dynamic stability map which is a three-dimensional graph of the normalized rms pressure fluctuation versus the overall equivalence ratio and percent pilot. The dynamic stability map identifies boundaries between stable and unstable combustion and results are presented characterizing the transition across one of these boundaries. Time-averaged two-dimensional chemiluminescence images of the stable flame and phase-averaged two-dimensional chemiluminescence images of the unstable flame are used to gain an understanding of the effect of the pilot on dynamic stability through changes in flame structure.

    Original languageEnglish (US)
    Title of host publicationCombustion, Fuels and Emissions
    PublisherAmerican Society of Mechanical Engineers (ASME)
    ISBN (Electronic)9780791850848
    DOIs
    StatePublished - Jan 1 2017
    EventASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition, GT 2017 - Charlotte, United States
    Duration: Jun 26 2017Jun 30 2017

    Publication series

    NameProceedings of the ASME Turbo Expo
    Volume4A-2017

    Other

    OtherASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition, GT 2017
    CountryUnited States
    CityCharlotte
    Period6/26/176/30/17

    All Science Journal Classification (ASJC) codes

    • Engineering(all)

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  • Cite this

    Li, J., Peluso, S., Quay, B., Santavicca, D., Blust, J., & Nivasan, S. (2017). Effect of pilot flame on flame macrostructure and combustion instability. In Combustion, Fuels and Emissions (Proceedings of the ASME Turbo Expo; Vol. 4A-2017). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/GT201764079