Investigation of velocity profiles for effusion cooling of a combustor liner

J. J. Scrittore, Karen Ann Thole, S. W. Burd

    Research output: Contribution to journalArticle

    60 Citations (Scopus)

    Abstract

    Effusion cooling of combustor liners for gas turbine engines is quite challenging and necessary to prevent thermal distress of the combustor liner walls. The flow and thermal patterns in the cooling layer are affected by the closely spaced film-cooling holes. It is important to fully document how the film layer behaves with a full-coverage cooling scheme to gain an understanding into surface cooling phenomena. This paper discusses experimental results from a combustor simulator tested in a low-speed wind tunnel. Engine representative, nondimensional coolant flows were tested for a full-coverage effusion plate. Laser Doppler velocimetry was used to measure the flow characteristics of the cooling layer. These experiments indicate that the full-coverage film cooling flow has unique and scaleable velocity profiles that result from the closely spaced effusion holes. A parametric study of the cooling flow behavior illustrates the complex nature of the film flow and how it affects cooling performance.

    Original languageEnglish (US)
    Pages (from-to)518-526
    Number of pages9
    JournalJournal of Turbomachinery
    Volume129
    Issue number3
    DOIs
    StatePublished - Jul 2007

    Fingerprint

    Combustors
    Cooling
    Coolants
    Velocity measurement
    Wind tunnels
    Gas turbines
    Turbines
    Simulators
    Engines
    Lasers

    All Science Journal Classification (ASJC) codes

    • Mechanical Engineering

    Cite this

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    abstract = "Effusion cooling of combustor liners for gas turbine engines is quite challenging and necessary to prevent thermal distress of the combustor liner walls. The flow and thermal patterns in the cooling layer are affected by the closely spaced film-cooling holes. It is important to fully document how the film layer behaves with a full-coverage cooling scheme to gain an understanding into surface cooling phenomena. This paper discusses experimental results from a combustor simulator tested in a low-speed wind tunnel. Engine representative, nondimensional coolant flows were tested for a full-coverage effusion plate. Laser Doppler velocimetry was used to measure the flow characteristics of the cooling layer. These experiments indicate that the full-coverage film cooling flow has unique and scaleable velocity profiles that result from the closely spaced effusion holes. A parametric study of the cooling flow behavior illustrates the complex nature of the film flow and how it affects cooling performance.",
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    Investigation of velocity profiles for effusion cooling of a combustor liner. / Scrittore, J. J.; Thole, Karen Ann; Burd, S. W.

    In: Journal of Turbomachinery, Vol. 129, No. 3, 07.2007, p. 518-526.

    Research output: Contribution to journalArticle

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    AU - Scrittore, J. J.

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    AU - Burd, S. W.

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