Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session ZC04: Aerodynamics: Fluid-Structure Interactions, Membranes and Flags
12:50 PM–2:47 PM,
Tuesday, November 21, 2023
Room: 101
Chair: Sonya Tiomkin, University of South Florida
Abstract: ZC04.00008 : Flow-induced oscillations of a rigid inverted flag and their application to energy harvesting
2:21 PM–2:34 PM
Presenter:
Winthrop Townsend
(University of Maryland, College Park)
Authors:
Winthrop Townsend
(University of Maryland, College Park)
Cecilia Huertas-Cerdeira
(University of Maryland, College Park)
Here, a rigid inverted flag system is investigated composed of a rigid aluminum flag and a torsional spring that provides the restoring force required to exhibit large amplitude LCOs. This configuration is of interest because it is compatible with electromagnetic power generation and thus an efficient counterpart to systems utilizing piezoelectric components. The behavior of the system when subjected to a uniform flow is experimentally investigated in a subsonic wind tunnel. Flag kinematics and power output are measured, and system dynamics are studied as a function of several parameters including non-dimensional stiffness and flag aspect ratio.
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