The Effect of Confinement on the Structure and Dynamic Response of Lean-Premixed, Swirl-Stabilized Flames

Alexander J. De Rosa, Stephen J. Peluso, Bryan David Quay, Domenic A. Santavicca

    Research output: Contribution to journalArticle

    15 Citations (Scopus)

    Abstract

    The effect of flame-wall interactions on the forced response of a lean-premixed, swirl-stabilized flame is experimentally investigated by examining flames in a series of three combustors, each with a different diameter, and therefore a different degree of lateral confinement. The confinement ratios tested are 0.5, 0.37, and 0.29 when calculated using the diameter of the nozzle relative to the combustor diameter. Using both flame images and measured flame transfer functions (FTFs), the effect of confinement is investigated and generalized across a broad range of operating conditions. The major effect of confinement is shown to be a change in flame structure in both the forced and unforced cases. This effect is captured using the parameter Lf,CoHR/Dcomb, which describes the changing degree of flame-wall interaction in each combustor size. The measured FTF data, as a function of confinement, are then generalized by Strouhal number. Data from the two larger combustors are collapsed by multiplying the Strouhal number by the confinement ratio to account for the flow expansion ratio and change in convective velocity within the combustor. Trends at the transfer function extrema are also assessed by examining them in the context of confinement and by using flame images. A change in the fluctuating structure of the flame is also seen to result from an increase in confinement.

    Original languageEnglish (US)
    Article number061507
    JournalJournal of Engineering for Gas Turbines and Power
    Volume138
    Issue number6
    DOIs
    StatePublished - Jun 1 2016

    Fingerprint

    Combustors
    Dynamic response
    Transfer functions
    Strouhal number
    Nozzles

    All Science Journal Classification (ASJC) codes

    • Nuclear Energy and Engineering
    • Fuel Technology
    • Aerospace Engineering
    • Energy Engineering and Power Technology
    • Mechanical Engineering

    Cite this

    De Rosa, Alexander J. ; Peluso, Stephen J. ; Quay, Bryan David ; Santavicca, Domenic A. / The Effect of Confinement on the Structure and Dynamic Response of Lean-Premixed, Swirl-Stabilized Flames. In: Journal of Engineering for Gas Turbines and Power. 2016 ; Vol. 138, No. 6.
    @article{9ff81dad7a0c4f5c825593235559c4e8,
    title = "The Effect of Confinement on the Structure and Dynamic Response of Lean-Premixed, Swirl-Stabilized Flames",
    abstract = "The effect of flame-wall interactions on the forced response of a lean-premixed, swirl-stabilized flame is experimentally investigated by examining flames in a series of three combustors, each with a different diameter, and therefore a different degree of lateral confinement. The confinement ratios tested are 0.5, 0.37, and 0.29 when calculated using the diameter of the nozzle relative to the combustor diameter. Using both flame images and measured flame transfer functions (FTFs), the effect of confinement is investigated and generalized across a broad range of operating conditions. The major effect of confinement is shown to be a change in flame structure in both the forced and unforced cases. This effect is captured using the parameter Lf,CoHR/Dcomb, which describes the changing degree of flame-wall interaction in each combustor size. The measured FTF data, as a function of confinement, are then generalized by Strouhal number. Data from the two larger combustors are collapsed by multiplying the Strouhal number by the confinement ratio to account for the flow expansion ratio and change in convective velocity within the combustor. Trends at the transfer function extrema are also assessed by examining them in the context of confinement and by using flame images. A change in the fluctuating structure of the flame is also seen to result from an increase in confinement.",
    author = "{De Rosa}, {Alexander J.} and Peluso, {Stephen J.} and Quay, {Bryan David} and Santavicca, {Domenic A.}",
    year = "2016",
    month = "6",
    day = "1",
    doi = "10.1115/1.4031885",
    language = "English (US)",
    volume = "138",
    journal = "Journal of Engineering for Gas Turbines and Power",
    issn = "0742-4795",
    publisher = "American Society of Mechanical Engineers(ASME)",
    number = "6",

    }

    The Effect of Confinement on the Structure and Dynamic Response of Lean-Premixed, Swirl-Stabilized Flames. / De Rosa, Alexander J.; Peluso, Stephen J.; Quay, Bryan David; Santavicca, Domenic A.

    In: Journal of Engineering for Gas Turbines and Power, Vol. 138, No. 6, 061507, 01.06.2016.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - The Effect of Confinement on the Structure and Dynamic Response of Lean-Premixed, Swirl-Stabilized Flames

    AU - De Rosa, Alexander J.

    AU - Peluso, Stephen J.

    AU - Quay, Bryan David

    AU - Santavicca, Domenic A.

    PY - 2016/6/1

    Y1 - 2016/6/1

    N2 - The effect of flame-wall interactions on the forced response of a lean-premixed, swirl-stabilized flame is experimentally investigated by examining flames in a series of three combustors, each with a different diameter, and therefore a different degree of lateral confinement. The confinement ratios tested are 0.5, 0.37, and 0.29 when calculated using the diameter of the nozzle relative to the combustor diameter. Using both flame images and measured flame transfer functions (FTFs), the effect of confinement is investigated and generalized across a broad range of operating conditions. The major effect of confinement is shown to be a change in flame structure in both the forced and unforced cases. This effect is captured using the parameter Lf,CoHR/Dcomb, which describes the changing degree of flame-wall interaction in each combustor size. The measured FTF data, as a function of confinement, are then generalized by Strouhal number. Data from the two larger combustors are collapsed by multiplying the Strouhal number by the confinement ratio to account for the flow expansion ratio and change in convective velocity within the combustor. Trends at the transfer function extrema are also assessed by examining them in the context of confinement and by using flame images. A change in the fluctuating structure of the flame is also seen to result from an increase in confinement.

    AB - The effect of flame-wall interactions on the forced response of a lean-premixed, swirl-stabilized flame is experimentally investigated by examining flames in a series of three combustors, each with a different diameter, and therefore a different degree of lateral confinement. The confinement ratios tested are 0.5, 0.37, and 0.29 when calculated using the diameter of the nozzle relative to the combustor diameter. Using both flame images and measured flame transfer functions (FTFs), the effect of confinement is investigated and generalized across a broad range of operating conditions. The major effect of confinement is shown to be a change in flame structure in both the forced and unforced cases. This effect is captured using the parameter Lf,CoHR/Dcomb, which describes the changing degree of flame-wall interaction in each combustor size. The measured FTF data, as a function of confinement, are then generalized by Strouhal number. Data from the two larger combustors are collapsed by multiplying the Strouhal number by the confinement ratio to account for the flow expansion ratio and change in convective velocity within the combustor. Trends at the transfer function extrema are also assessed by examining them in the context of confinement and by using flame images. A change in the fluctuating structure of the flame is also seen to result from an increase in confinement.

    UR - http://www.scopus.com/inward/record.url?scp=84948431049&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84948431049&partnerID=8YFLogxK

    U2 - 10.1115/1.4031885

    DO - 10.1115/1.4031885

    M3 - Article

    AN - SCOPUS:84948431049

    VL - 138

    JO - Journal of Engineering for Gas Turbines and Power

    JF - Journal of Engineering for Gas Turbines and Power

    SN - 0742-4795

    IS - 6

    M1 - 061507

    ER -