The effects of mainstream turbulence intensity on the film-cooling effectiveness of antivortex film-cooling holes were experimentally investigated. Four film-cooling hole configurations and three mainstream turbulence intensities (1, 6.5, and 16) were tested. The primary film-cooling hole had a 30 deg angle with respect to the mainstream flow, and the angles between the primary and auxiliary holes of the antivortex holes were 0, 15, and 30 deg, respectively. The film-cooling effectiveness was measured using pressure-sensitive paint technique. The particle image velocimetry measurement results showed that the coolant from the antivortex film-cooling hole stayed closer to the endwall than that for the cylindrical hole case. The film-cooling effectiveness for the antivortex hole cases was higher than that for the cylindrical hole case for all blowing ratios. For the antivortex hole cases, the coolant-covered area generally increased as the blowing ratio increased. For the high mainstream turbulence intensity case, the higher blowing ratio cases showed greater film-cooling effectiveness due to the dragdown of the coolant. Among the tested configurations, the 15 deg antivortex hole case showed the best film-cooling performance at all blowing ratios and turbulence intensities.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Film-Cooling Effectiveness of Antivortex Holes at Three Different Mainstream Turbulence Levels



    Erschienen in:

    Erscheinungsdatum :

    2017




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch



    Klassifikation :

    BKL:    55.50 Luftfahrzeugtechnik / 55.50
    Lokalklassifikation TIB:    770/7040





    Performance of Tripod Antivortex Injection Holes on Vane Suction Side Film Cooling

    LeBlanc, Christopher / Narzary, Diganta / Ekkad, Srinath | AIAA | 2011


    A Novel Antivortex Turbine Film-Cooling Hole Concept

    Heidmann, James D. | Online Contents | 2008


    Film-Cooling Performance of Antivortex Hole on a Flat Plate

    LeBlanc, Christopher | Online Contents | 2013