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Optimization of Operation Parameters of Dielectric Barrier-Discharge Plasma Actuators for Influencing Tollmien-Schlichting Waves

DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf.1580
page 12

R. Quadros
Center of Smart Interfaces, Technische UniversitÄat Darmstadt, Flughafenstraße, 19, D-64347, Germany

Sven Grundmann
Department of Mechanical Engineering Institute of Fluid Mechanics and Aerodynamics (SLA) / Center of Smart Interfaces (CSI) Technische Universitat Darmstadt Petersenstrasse 17, D-64287 Darmstadt, Germany

Cameron Tropea
Technische Universität Darmstadt, Institute of Fluid Mechanics and Aerodynamics, Center of Smart Interfaces, International Research Training Group Darmstadt-Tokyo on Mathematical Fluid Dynamics, Germany

A. D. Reeh
Center of Smart Interfaces, Technische UniversitÄat Darmstadt, Flughafenstraße, 19, D-64347, Germany

Résumé

This paper describes a numerical study to optimize the operational parameters used for dielectric barrier discharge (DBD) plasma actuators in controlling Tollmien-Schlichting waves (TS-waves). The authors use a phenomenological model of the body force induced by the actuators operating in a sinusoidal mode. The simulations are performed using LES and the optimization methods are implemented into a CFD code (FASTEST). The results for two models of numerical optimization are presented: the closed-control circuit (CLC) developed by the authors and a simplex NELMEAD model. The objective function of the optimization is to maximize the reduction of the TS-wave amplitude at the wall while minimizing the consumed power: the appropriate amplitude and temporal duration of the body force is sought. Using the optimum data an application of linear stability theory demonstrates the additional flow stabilizing effect of the plasma actuator.

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