Analytical studies based on a turbulent mixing noise prediction technique indicate that jet noise power levels are increased when a jet is situated in a crossflow. V/STOL model transport acoustic test data obtained in the NASA Ames 40 ft. x 80 ft. wind tunnel confirmed this jet noise power level increase due to crossflow. Increases up to 6 db at a Strouhal number of 2.5 and crossflow velocity to jet velocity ratio of 0.58 were observed. The power level increases observed in the experimental data confirm the predicted power level increases.


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    Titel :

    Effect of crossflow velocity on the generation of lift fan jet noise in VTOL aircraft


    Beteiligte:
    Stimpert, D. L. (Autor:in) / Fogg, R. G. (Autor:in)

    Erscheinungsdatum :

    01.02.1973


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :




    Performance characteristics of a model VTOL lift fan in crossflow.

    Lieblein, S. / Yuska, J. A. / Diedrich, J. H. | NTRS | 1973


    Performance characteristics of a model VTOL lift fan in crossflow.

    LIEBLEIN, S. / YUSKA, J. A. / DIEDRICH, J. H. | AIAA | 1973


    VTOL AIRCRAFT LIFT INCREASING DEVICE

    KIRIAKIDI SERGEJ KONSTANTINOVICH / ANOKHIN IVAN MIKHALOVICH / KOTOV IVAN ALEKSEEVICH | Europäisches Patentamt | 2015

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