19 June 2000 Low Reynolds number flow control via active material actuators
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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.
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Bruce F. Carroll, Bruce F. Carroll, Lou Cattafesta, Lou Cattafesta, Andrew J. Kurdila, Andrew J. Kurdila, Carlos Fuentes, Carlos Fuentes, Xiang Zhao, 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); doi: 10.1117/12.388779; https://doi.org/10.1117/12.388779
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