This paper describes unconventional techniques to manipulate the pressures, forces, and moments acting on an airfoil without movable control surfaces. The method relies on active flow control (AFC), a versatile tool for modifying flowfields to create innovative flow effectors. By the generation of unsteady vortices emanating from suction and oscillatory blowing (SaOB) actuators, attached or incipiently separated flows are forced to be separate or become more attached. In this way, pressures, forces, and moments acting on an airfoil can be altered in a desired and controlled manner. Wind-tunnel tests performed on the Israel Aerospace Industries AR2 low-Reynolds-number airfoil included baseline and AFC configurations. The airfoil was instrumented with two independent SaOB actuator arrays. If eventually the concept can be transferrable to finite wings it would create an alternative maneuvering system, with no moving parts. It was found that the current AFC system is capable of increasing the lift (as a virtual flap system) or increasing the drag (as a virtual spoiler) while only weakly altering the other parameter, over a wide range of incidence angles from zero lift to stall. The system has an effect that is deemed minor on the airfoil pitching moment, again to be evaluated on a specific three-dimensional configuration. The effects of the mass and momentum transfer on the estimated forces and moments are discussed as well.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Active Flow Control Virtual Maneuvering System Applied to Conventional Airfoil


    Beteiligte:
    Dolgopyat, D. (Autor:in) / Seifert, A. (Autor:in)

    Erschienen in:

    AIAA Journal ; 57 , 1 ; 72-89


    Erscheinungsdatum :

    2018-12-18


    Format / Umfang :

    18 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Conventional Airfoil Active Flow Control ``Virtual'' Maneuvering System

    Dolgopyat, Danny / Seifert, Avi | British Library Conference Proceedings | 2015


    Maneuvering Aspects and 3D Effects of Active Airfoil Flow Control

    Timor, Itay / Ben-Hamou, Eli / Guy, Yair et al. | AIAA | 2004


    Active Flow Control Maneuvering System

    Dolgopyat, D. / Seifert, A. / Tekhniyon, Makhon tekhnologi le-Yisra'el | British Library Conference Proceedings | 2014


    Active Flow Control Applied to an Airfoil

    Donovan, J. F. / Kral, L. D. / Cary, A. W. et al. | British Library Conference Proceedings | 1998


    Active flow control applied to an airfoil

    Donovan, John / Kral, Linda / Cary, Andrew | AIAA | 1998