Vortex generators with heights comparable to displacement thickness are an effective means of producing persistent mean-flow streaks in laminar boundary layers. Inducing streaky base flows can suppress the growth of unsteady disturbances that would otherwise incite laminar-to-turbulent transition. Previous experimental and numerical works demonstrated the versatility of these miniature vortex generators in zero-pressure-gradient boundary layers. In this work, mean-flow disturbances developing from miniature vortex generators in adverse and favorable pressure-gradient boundary layers are measured systemically to assess the possibility of extending miniature vortex generator-based flow control to these scenarios. Boundary-layer streak amplitudes are measured across a range of Falkner–Skan m values, and an empirical scaling is found based on existing results. The effect of streaks on transition in an adverse pressure-gradient boundary layer is also tested, and moderate increases to laminar flow extents are observed.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Miniature Vortex Generators for Flow Control in Falkner–Skan Boundary Layers



    Published in:

    AIAA Journal ; 55 , 2 ; 352-364


    Publication date :

    2017-02-01




    Type of media :

    Conference paper , Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Evaluation of Miniature Vortex Generators for Flow Control in Falkner-Skan Boundary Layers

    Downs, Robert S. / Fallenius, Bengt / Fransson, Jens et al. | AIAA | 2016


    Evaluation of Miniature Vortex Generators for Flow Control in Falkner-Skan Boundary Layers (AIAA 2016-2067)

    Downs, Robert S. / Fallenius, Bengt / Fransson, Jens et al. | British Library Conference Proceedings | 2016


    Falkner-Skan Flow over a Wedge with Slip Boundary Conditions

    Martin, Michael J. / Boyd, Iain D. | AIAA | 2010


    Falkner-Skan Flow Over a Wedge with Slip Boundary Conditions

    Martin, Michael / Boyd, Iain | AIAA | 2009


    Falkner-skan equation for wakes

    STEWARTSON, K. | AIAA | 1964