Active flow control (AFC) in the form of sweeping jet (SWJ) excitation and discrete steady jet excitation is used to control the flow separation on a National Advisory Council for Aeronautics (NACA) 0015 semispan wing with a deflected, simple-hinged, trailing edge flap. This geometry has been the focus of several recent publications that investigated methods to improve the efficiency of SWJ actuators. In the current study, the interaction of the AFC excitation with the separated flowfields of several flap deflection angles was examined. Previous studies with this model have been limited to a maximum flap deflection angle of 40 deg. The flap deflection range was extended to 60 deg because systems studies have indicated that a high-lift system with simple-hinged flaps may require larger flap deflections than the Fowler flaps found on most high-lift systems. The results obtained at flap deflection angles of 20, 40, and 60 deg are presented and compared. Force and moment data, particle image velocimetry (PIV) data, and steady and unsteady surface pressure data are used to describe the flowfield with and without AFC. With a flap deflection of 60 deg, increasing the SWJ actuator momentum at the flap shoulder increased lift due to an increase in circulation but did not completely eliminate the recirculation region above the flap surface. AFC using the discrete steady jet actuators of this study increased lift as well but required more mass flow than the SWJ actuators and had a detrimental effect on lift at the highest mass flow level tested. PIV results showed that the angle between the excitation and the flap surface was not optimal for attaching the separated shear layer.


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    Titel :

    Active Flow Control via Discrete Sweeping and Steady Jets on a Simple-Hinged Flap


    Beteiligte:
    Melton, LaTunia Pack (Autor:in) / Koklu, Mehti (Autor:in) / Andino, Marlyn (Autor:in) / Lin, John C. (Autor:in)

    Erschienen in:

    AIAA Journal ; 56 , 8 ; 2961-2973


    Erscheinungsdatum :

    2018-06-13


    Format / Umfang :

    13 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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