The aerodynamics of an inverted airfoil close to a moving ground oscillating periodically in pure pitching motion and in combined pitching–heaving motion has been studied numerically. The main effect of the ground in pure pitching is to increase separation on the suction side, leading to larger hysteresis. At low frequencies, the airfoil under pitching motion can stall if the flow remains separated for a large part of the cycle. This type of stall is characteristically different from dynamic stall in freestream. Regarding the combined pitching and heaving motion, the pitch mode controls the flow at low frequencies, whereas the heave mode prevails at high frequencies. The interaction between both modes of motion is determined by the phase shift between them, and the modes can interact positively or negatively. The introduction of heaving can help improve the stall characteristics of an isolated pitching motion when flapping at low ground clearances.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Aerodynamics of a Pitching and Heaving Airfoil in Ground Effect


    Contributors:
    Molina, Juan (author) / Zhang, Xin (author) / Alomar, Antoni (author)

    Published in:

    AIAA Journal ; 54 , 4 ; 1158-1171


    Publication date :

    2016-02-24


    Size :

    14 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





    Aerodynamics of a Heaving Airfoil in Ground Effect

    Molina, J | Online Contents | 2011


    Aerodynamics of a Heaving Airfoil in Ground Effect

    Molina, Juan / Zhang, Xin | AIAA | 2011


    Aerodynamics of Heaving and Pitching Foils in Tandem from Linear Potential Theory

    Alaminos-Quesada, Javier / Fernandez-Feria, Ramón | AIAA | 2019


    Performance of Heaving and Passively Pitching Hydrofoils

    Mattheijssens, J. / Marcel, J.-P. / Bosschaerts, W. et al. | British Library Conference Proceedings | 2013