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    Inflow Measurement Made with a Laser Velocimeter on a Helicopter Model in Forward Flight. Volume 3. Rectangular Planform Blades at an Advance Ratio of 0.30

    Inflow Measurement Made with a Laser Velocimeter on a Helicopter Model in Forward Flight. Volume 3. Rectangular Planform Blades at an Advance Ratio of 0.30


    An experimental investigation was conducted in the 14- by 22-Foot Subsonic Tunnel at NASA Langley Research Center to measure the inflow into a scale model helicopter rotor in forward flight (mu sub infinity = 0.30). The measurements were made with a two component Laser Velocimeter (LV) one chord above the plane formed by the path of the rotor tips (tip path plane). A conditional sampling technique was employed to determine the azimuthal position of the rotor at the time that each velocity measurement was made so that the azimuthal fluctuations in velocity could be determined. Measurements were made at a total of 180 separate locations in order to clearly define the inflow character. These data are presented without analysis.

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    Titel :

    Inflow Measurement Made with a Laser Velocimeter on a Helicopter Model in Forward Flight. Volume 3. Rectangular Planform Blades at an Advance Ratio of 0.30

    Beteiligte:
    J. W. Elliott (Autor:in) / S. L. Althoff (Autor:in) / R. H. Sailey (Autor:in)
    Erscheinungsdatum :

    1988

    Format / Umfang :

    390 pages

    Medientyp :

    Report

    Format :

    Keine Angabe

    Sprache :

    Englisch

    Schlagwörter :

    Aerodynamics , Flow measurement , Helicopters , Rotors , Wind tunnel models , Laser doppler velocimeters , Azimuth , Velocity measurement

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