Friday, 11:00 - 11:25 h, Room: MA 415

 

Jane Ghiglieri
Optimal flow control based on POD and MPC for the cancellation of Tollmien-Schlichting waves by plasma actuators

Coauthor: Stefan Ulbrich

 

Abstract:
The occurrence of a transition in a flat plate boundary layer is characterized by the formation of growing disturbances inside the boundary layer, the Tollmien-Schlichting waves. Successful damping of these waves can delay transition for a significant distance downstream, lowering the skin friction drag of the body.
We consider plasma actuators which induce a body force for active flow control. By optimal control of the plasma actuator parameters it is possible to reduce or even cancel the Tollmien-Schlichting waves and delay the turbulence transition.
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We present a Model predictive control (MPC) approach for the cancellation of Tollmien-Schlichting waves in the boundary layer of a flat plate. We use proper orthogonal decomposition (POD) for the low-order description of the flow model and the optimization of the control parameters is performed within the reduced system.
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Furthermore, we will show methods for improving the reduced model whose quality is verified in comparison to the results of a finite element based simulation for the considered problem.
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Finally, we present our cancellation results with this MPC approach in a numerical simulation.

 

Talk 2 of the contributed session Fri.1.MA 415
"Reduced order model based optimization" [...]
Cluster 19
"PDE-constrained optimization & multi-level/multi-grid methods" [...]

 

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