Title :
Control, observation and energy regulation of wake flow instabilities
Author :
Tadmor, Gilead ; Noack, Bemd R. ; Dillmann, Andreas ; Gerhard, Johannes ; Pastoor, Mark ; King, Rudibert ; Morzynski, Marek
Author_Institution :
Dept. of Electr. & Comput. Eng., Northeastern Univ., Boston, MA, USA
Abstract :
A three-dimensional Galerkin model is used in feedback design to regulate the perturbation kinetic energy in the flow around a cylinder. The objective may vary from stabilization in order to reduce drag to mixing enhancement. The Landau model [H.K. Khalil, 2002] includes an oscillatory state pair and a shift mode, exchanging energy with the mean flow. Given the model´s simplicity, it is essential to maintain closed-loop dynamics close to the system´s natural dynamic range which is represented by an invariant manifold and a natural frequency, adding a design constraint addressed in this note.
Keywords :
Galerkin method; closed loop systems; feedback; flow control; fluid dynamics; stability; wakes; closed-loop dynamics; energy regulation; feedback design; perturbation kinetic energy; stabilization; three-dimensional Galerkin model; wake flow instabilities; Actuators; Computational fluid dynamics; Drag; Energy capture; Engine cylinders; Feedback; Fluid dynamics; Fluid flow control; Kinetic theory; Mechanical variables measurement;
Conference_Titel :
Decision and Control, 2003. Proceedings. 42nd IEEE Conference on
Print_ISBN :
0-7803-7924-1
DOI :
10.1109/CDC.2003.1272967
