The flow over an OA209 airfoil subjected to a sinusoidal pitching motion under dynamic stall conditions is investigated experimentally by means of time resolved particle image velocimetry (TR-PIV) and surface pressure measurements. Dynamic stall is distinguished by the formation and convection of large scale coherent structures and a delay in massive flow separation. A vortex detection scheme based on an identification function derived directly from the velocity fields is adopted to identify vortex cores. The combination of global time resolved imaging and an automated vortex identification algorithm allows for the investigation of the spatial and temporal evolution of vortical structures within a single oscillation. Furthermore, the mechanisms associated with the dynamic stall delay are considered.


    Access

    Download


    Export, share and cite



    Title :

    Investigation of unsteady flow development over a pitching airfoil by means of TR-PIV


    Contributors:

    Conference:

    2009 ; San Antonio, Texas


    Publication date :

    2009


    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




    Investigation of the Unsteady Flow Development Over a Pitching Airfoil by Means of TR-PIV

    Mulleners, Karen / Henning, Arne / Mai, H et al. | AIAA | 2009


    Investigation of the Unsteady Flow Development Over a Pitching Airfoil by Means of TR-PIV

    Mulleners, K. / Henning, A. / Raffel, M. et al. | British Library Conference Proceedings | 2009



    Unsteady pressure field and vorticity production over a pitching airfoil

    ACHARYA, MUKUND / METWALLY, METWALLY H. | AIAA | 1992