The aims of this study were to investigate the effect of using a wall-normal, 2D micro zero-net-mass-flux (ZNMF) jet located at the leading edge of a NACA 0015 airfoil to actively control flow separation and enhance lift.

    Design/methodology/approach

    Experiments were conducted over a two-dimensional airfoil in a water tunnel at a Reynolds number of 3.08 × 104 for the parametric investigation and the detailed multigrid cross-correlation digital particle image velocimetry (MCCDPIV) measurements. Flow visualisation experiments were carried out at a lower Reynolds number of 1.54 × 104.

    Findings

    The largest lift increase was observed when a non-dimensional frequency of 1.3 and an oscillatory momentum blowing coefficient of 0.14 per cent was employed. Under these forcing conditions the stall angle of the airfoil was mitigated from an angle of attack of 10o to one of 18o, resulting in a maximum lift coefficient increase of 46 per cent above the uncontrolled lift coefficient. Planar laser induced fluoroscopy and MCCDPIV revealed that the lift increments were the result of the generation of a train of large-scale, spanwise lifting vortices that convected over the suction surface of the airfoil. The presence of these structures resulted in the flow seemingly remaining attached to the upper surface of the airfoil for a wider range of angles of attack.

    Originality/value

    This study is significant as it provides quantitative experimental data, which clearly demonstrates the effectiveness of a 2D micro ZNMF jet in controlling flow separation of a NACA 0015 airfoil at high angles of attack and thus, enhancing lift. Furthermore, the flow visualisations and MCCDPIV measurements have provided insight into the mechanisms responsible for the improvement in lift. This new understanding has applications beyond the NACA 0015 airfoil used in this study.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Separation control on a NACA 0015 airfoil using a 2D micro ZNMF jet


    Beteiligte:
    Tuck, A. (Autor:in) / Soria, J. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2008-03-21


    Format / Umfang :

    6 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





    Separation Control on a NACA 0015 Airfoil with Plasma-Actuator-Generated Disturbance

    Lu, Zongyan / Wong, Chi Wai / Wang, Longjun et al. | AIAA | 2016


    Flow Separation Control over a NACA 0015 Airfoil Using Nanosecond-Pulsed Plasma Actuator

    Zheng, Jianguo / Cui, Y. D. / Zhao, Zijie et al. | AIAA | 2018


    Vortex Developments Over NACA 0015 Airfoil with Trailing Edge Jet

    Okong'o, N. / Finaish, F. / Society of Automotive Engineers | British Library Conference Proceedings | 1994


    Control of Dynamic Stall over a NACA 0015 Airfoil Using Plasma Actuators

    Singhal, Achal / Castañeda, David / Webb, Nathan et al. | AIAA | 2017