Recently, plasma actuators have been employed to control laminar-to-turbulent transition in Blasius flow by exciting counter-rotating longitudinal vortices. Due to the resulting momentum redistribution, the vortices generate a spanwise modulation of the flow with regions of high and low streamwise velocity, which are commonly denoted as streaks. In the case of moderate amplitudes, the streaks yield a stabilization of the flow by reducing the amplification of Tollmien–Schlichting waves, and hence delayed transition. In the present work, two fundamentally different actuator setups are investigated: a symmetrical one, exciting counter-rotating vortices; and a nonsymmetrical one, exciting corotating vortices. The differences between these setups are discussed in detail, and the respective stabilization of the flow is scrutinized.


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    Title :

    Numerical Investigations on Tollmien–Schlichting Wave Attenuation Using Plasma-Actuator Vortex Generators


    Contributors:

    Published in:

    AIAA Journal ; 56 , 4 ; 1305-1309


    Publication date :

    2018-04-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





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