High freestream turbulence simulation in a scaled-up turbine vane passage

B. A. Bangert, A. Kohli, J. H. Sauer, Karen Ann Thole

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

    Abstract

    Quantifying high freestream turbulence effects on surface heat transfer and on blade boundary layer development is important for improving predictions of the thermal loading and aerodynamic losses for gas turbine blades, vanes, and endwalls. To improve our physical understanding as well as improve CFD capabilities, detailed flow and thermal field data is needed in addition to surface data. This paper discusses the development of a turbulence generator that is capable of generating turbulence intensities as high as 20% and yet allow an independent control on the turbulent length scale. The integral length scale at a turbulence intensity of T1 = 20% ranged from 2.1 cm to 5.5 cm. The development of the turbulence generator took place in a wind tunnel having a large, constant area, test section. After this development, the turbulence generator was placed upstream of a scaled-up turbine vane. This paper also describes the development of the turbine vane test section that has a central first stage stator vane that was scaled up by a factor of nine, Finally, turbulence measurements, turbulent length scales, and energy spectra measured inside the turbine vane passage are presented and compared to measurements that were made in the constant area test section. The results indicate that in the first 40% of the stator vane passage, the turbulence levels rapidly decrease by a factor of four with the integral length scales having a rapid growth.

    Original languageEnglish (US)
    Title of host publicationAircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery
    PublisherAmerican Society of Mechanical Engineers (ASME)
    ISBN (Electronic)9780791878682
    DOIs
    StatePublished - Jan 1 1997
    EventASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition, GT 1997 - Orlando, United States
    Duration: Jun 2 1997Jun 5 1997

    Publication series

    NameProceedings of the ASME Turbo Expo
    Volume1

    Other

    OtherASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition, GT 1997
    CountryUnited States
    CityOrlando
    Period6/2/976/5/97

    Fingerprint

    Turbulence
    Turbines
    Stators
    Turbomachine blades
    Wind tunnels
    Gas turbines
    Aerodynamics
    Computational fluid dynamics
    Boundary layers
    Heat transfer

    All Science Journal Classification (ASJC) codes

    • Engineering(all)

    Cite this

    Bangert, B. A., Kohli, A., Sauer, J. H., & Thole, K. A. (1997). High freestream turbulence simulation in a scaled-up turbine vane passage. In Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery (Proceedings of the ASME Turbo Expo; Vol. 1). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/97-GT-051
    Bangert, B. A. ; Kohli, A. ; Sauer, J. H. ; Thole, Karen Ann. / High freestream turbulence simulation in a scaled-up turbine vane passage. Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery. American Society of Mechanical Engineers (ASME), 1997. (Proceedings of the ASME Turbo Expo).
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    title = "High freestream turbulence simulation in a scaled-up turbine vane passage",
    abstract = "Quantifying high freestream turbulence effects on surface heat transfer and on blade boundary layer development is important for improving predictions of the thermal loading and aerodynamic losses for gas turbine blades, vanes, and endwalls. To improve our physical understanding as well as improve CFD capabilities, detailed flow and thermal field data is needed in addition to surface data. This paper discusses the development of a turbulence generator that is capable of generating turbulence intensities as high as 20{\%} and yet allow an independent control on the turbulent length scale. The integral length scale at a turbulence intensity of T1 = 20{\%} ranged from 2.1 cm to 5.5 cm. The development of the turbulence generator took place in a wind tunnel having a large, constant area, test section. After this development, the turbulence generator was placed upstream of a scaled-up turbine vane. This paper also describes the development of the turbine vane test section that has a central first stage stator vane that was scaled up by a factor of nine, Finally, turbulence measurements, turbulent length scales, and energy spectra measured inside the turbine vane passage are presented and compared to measurements that were made in the constant area test section. The results indicate that in the first 40{\%} of the stator vane passage, the turbulence levels rapidly decrease by a factor of four with the integral length scales having a rapid growth.",
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    Bangert, BA, Kohli, A, Sauer, JH & Thole, KA 1997, High freestream turbulence simulation in a scaled-up turbine vane passage. in Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery. Proceedings of the ASME Turbo Expo, vol. 1, American Society of Mechanical Engineers (ASME), ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition, GT 1997, Orlando, United States, 6/2/97. https://doi.org/10.1115/97-GT-051

    High freestream turbulence simulation in a scaled-up turbine vane passage. / Bangert, B. A.; Kohli, A.; Sauer, J. H.; Thole, Karen Ann.

    Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery. American Society of Mechanical Engineers (ASME), 1997. (Proceedings of the ASME Turbo Expo; Vol. 1).

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

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    Bangert BA, Kohli A, Sauer JH, Thole KA. High freestream turbulence simulation in a scaled-up turbine vane passage. In Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery. American Society of Mechanical Engineers (ASME). 1997. (Proceedings of the ASME Turbo Expo). https://doi.org/10.1115/97-GT-051