Aerodynamics of cambered airfoils are investigated numerically, using a NACA four-digit series of 6% thickness at low Reynolds number R e = 10,000 and moderate Mach number M = 0.2 , by focusing on the relation of aeroacoustic effects and hydrodynamic flow unsteadiness. Two-dimensional numerical simulations show that the onset of an acoustic feedback loop leads to an abrupt increase in lift force. Associated with the feedback process, the evolution of two-dimensional vortices in the suction-side boundary layer shifts a separation bubble toward the leading edge, which causes a relatively steep pressure recovery near the trailing edge. Through a parametric study on airfoil shape, the aerodynamically favorable feature of aft camber is further enhanced with the presence of an acoustic feedback loop. In addition, the aft camber airfoil successfully forms a laminar separation bubble in three-dimensional calculations at the present Reynolds number, developing transitional behavior on the suction side, supposedly prompted by the airfoil tones. Although the boundary layer shows three-dimensional complexity, still the formation of an acoustic feedback loop is strongly suggested, via the comparison of spanwise correlations.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Self-Noise Effects on Aerodynamics of Cambered Airfoils at Low Reynolds Number


    Beteiligte:
    Ikeda, Tomoaki (Autor:in) / Atobe, Takashi (Autor:in) / Fujimoto, Daisuke (Autor:in) / Inasawa, Ayumu (Autor:in) / Asai, Masahito (Autor:in)

    Erschienen in:

    AIAA Journal ; 53 , 8 ; 2256-2269


    Erscheinungsdatum :

    2015-06-09


    Format / Umfang :

    14 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





    Unsteady aerodynamics of plunging cambered foil at low Reynolds number

    Shaik, Masuruddin / Hazarika, Shyamanta M | SAGE Publications | 2023


    Low-Reynolds Number Aerodynamics of Airfoils at Incidence

    Abdo, Mohammed / Mateescu, Dan | AIAA | 2005


    Low-Reynolds Number Aerodynamics of Airfoils at Incidence

    Abdo, M. / Mateescu, D. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2005


    Steady Aerodynamics of Thick and Cambered Airfoils with Porosity Gradients

    Hajian, Rozhin / Jaworski, Justin W. | AIAA | 2016