Low Reynolds number flow control via active material actuators

Bruce F. Carroll; Lou Cattafesta; Andrew J. Kurdila; Carlos Fuentes; Xiang Zhao

doi:10.1117/12.388779

19 June 2000 Low Reynolds number flow control via active material actuators

Bruce F. Carroll, Lou Cattafesta, Andrew J. Kurdila, Carlos Fuentes, Xiang Zhao

Proceedings Volume 3984, Smart Structures and Materials 2000: Mathematics and Control in Smart Structures; (2000) https://doi.org/10.1117/12.388779
Event: SPIE's 7th Annual International Symposium on Smart Structures and Materials, 2000, Newport Beach, CA, United States

Abstract

An experimental testbed is described that is used to study the feasibility of control of a class of flows that have low Reynolds numbers. The experimental testbed is comprised of a thin airfoil with a backward facing step machined into the upper surface. A thin PZT composite flap is mounted at the edge of the backward facing step to enable modification of the flow. Output measurement sensors consist of MEMs-based shear stress sensors, and conventional pressure taps, located on the surface of the airfoil. This paper derives a control framework for the synthesis of control methodologies for the testbed. A reduced order control model is obtained by employing reduced basis approximations of the two dimensional Navier-Stokes equations. Preliminary open loop experimental results are reported that illustrate the existence of convected large scale structures in the flow.

Citation Download Citation

Bruce F. Carroll, Lou Cattafesta, Andrew J. Kurdila, Carlos Fuentes, and Xiang Zhao "Low Reynolds number flow control via active material actuators", Proc. SPIE 3984, Smart Structures and Materials 2000: Mathematics and Control in Smart Structures, (19 June 2000); https://doi.org/10.1117/12.388779

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