Active flow control efficacy was investigated by means of leading-edge and flap-shoulder zero mass-flux blowing slots on a semispan wing model that was tested in unswept (standard) and swept configurations. On the standard configuration, stall commenced inboard, but with sweep the wing stalled initially near the tip. On both configurations, leading-edge perturbations increased C(sub L,max) and post stall lift, both with and without deflected flaps. Without sweep, the effect of control was approximately uniform across the wing span but remained effective to high angles of attack near the tip; when sweep was introduced a significant effect was noted inboard, but this effect degraded along the span and produced virtually no meaningful lift enhancement near the tip, irrespective of the tip configuration. In the former case, control strengthened the wingtip vortex; in the latter case, a simple semi-empirical model, based on the trajectory or streamline of the evolving perturbation, served to explain the observations. Control on finite-span flaps did not differ significantly from their two-dimensional counterpart, while control over a tip flap produced significant variations to all three moments in the presence of large deflection and these variations were linear with input slot momentum. Control from the flap produced expected lift enhancement and CL,max improvements in the absence of sweep, but these improvements degraded with the introduction of sweep.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Influence of Finite Span and Sweep on Active Flow Control Efficacy


    Contributors:

    Conference:

    25th AIAA Applied Aerodynamics Conference ; 2007 ; Miami, FL, United States


    Publication date :

    2007-06-25


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




    Influence of Finite Span and Sweep on Active Flow Control Efficacy

    Greenblatt, David / Washburn, Anthony E. | AIAA | 2008


    Influence of Finite Span and Sweep on Active Flow Control Efficacy

    Greenblatt, D. / Washburn, A. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2007



    Influence of Finite Span and Sweep on Active Flow Control Efficacy

    Greenblatt, David / Washburn, Anthony | AIAA | 2007


    Linear Parameter-Varying Control of Variable Span-Sweep Morphing Aircraft

    Lee, Jihoon / Kim, Seong-hun / Jung, Seungyun et al. | AIAA | 2019