The use of plasma actuators for active transition control in a flat-plate boundary layer is studied numerically. The full unsteady two-dimensional incompressible Navier–Stokes equations are solved with a perturbation formulation using a finite volume discretization. The effect of the plasma actuator is modeled using generic as well as experimentally derived body force distributions. An adaptive control system based on the filtered- x least-mean-squares algorithm is included within the simulations. The control system selects the optimum frequency, phase, and amplitude of the body force in order to attenuate Tollmien–Schlichting instability waves. The factors influencing the effectiveness of transition control are discussed. It is shown that the relative size of the instability wavelength and the spatial extent of the body force have a strong influence on control performance. It is also demonstrated that the experimentally derived force distributions produce suboptimal control performance when compared with generic body force distributions. This has implications for the design of plasma actuators for boundary-layer instability control.


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    Title :

    Numerical Study of the Control of Tollmien–Schlichting Waves Using Plasma Actuators


    Contributors:

    Published in:

    AIAA Journal ; 51 , 10 ; 2353-2364


    Publication date :

    2013-10-01




    Type of media :

    Conference paper , Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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