11 April 2017 Experimental investigation of low aspect ratio, large amplitude, aeroelastic energy harvesting systems
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Interest in clean, stable, and renewable energy harvesting devices has increased dramatically with the volatility of petroleum markets. Specifically, research in aero/hydro kinetic devices has created numerous new horizontal and vertical axis wind turbines, and oscillating wing turbines. Oscillating wing turbines (OWTs) differ from their wind turbine cousins by having a rectangular swept area compared to a circular swept area. The OWT systems also possess a lower tip speed that reduces the overall noise produced by the system. OWTs have undergone significant computational analysis to uncover the underlying flow physics that can drive the system to high efficiencies for single wing oscillations. When two of these devices are placed in tandem configuration, i.e. one placed downstream of the other, they either can constructively or destructively interact. When constructive interactions occurred, they enhance the system efficiency to greater than that of two devices on their own. A new experimental design investigates the dependency of interaction modes on the pitch stiffness of the downstream wing. The experimental results demonstrated that interaction modes are functions of convective time scale and downstream wing pitch stiffness. Heterogeneous combinations of pitch stiffness exhibited constructive and destructive lock-in phenomena whereas the homogeneous combination exhibited only destructive interactions.
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Benjamin Kirschmeier, Benjamin Kirschmeier, Jacob Summerour, Jacob Summerour, Matthew Bryant, Matthew Bryant, } "Experimental investigation of low aspect ratio, large amplitude, aeroelastic energy harvesting systems", Proc. SPIE 10164, Active and Passive Smart Structures and Integrated Systems 2017, 101641F (11 April 2017); doi: 10.1117/12.2258678; https://doi.org/10.1117/12.2258678

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