Energy harvesting measurements from stall flutter limit cycle oscillations

Jasper Chen; Adit Dhanushkodi; Christopher L. Lee

doi:10.1117/12.2045233

1 April 2014 Energy harvesting measurements from stall flutter limit cycle oscillations

Jasper Chen, Adit Dhanushkodi, Christopher L. Lee

Proceedings Volume 9057, Active and Passive Smart Structures and Integrated Systems 2014; 90570G (2014) https://doi.org/10.1117/12.2045233
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2014, San Diego, California, United States

Abstract

Results from experiments using a two-degree-of-freedom airfoil system are presented. Air speeds of the airfoil are determined at which dynamic flutter can be initiated and where limit cycle oscillations (LCO) can be excited by initial (pitch or plunge) displacements. LCO’s with large pitch angle displacements attributed to stall flutter behavior are measured. The LCO oscillations are converted into electric power by an electromagnetic-inductor device. The energy harvester consists of three magnets in which one magnet floats between two fixed magnets. The force-displacement relationship of the harvester is best described by a fifth-order polynomial. The integration of the harvester into the airfoil system introduces nonlinear stiffness into the vertical (plunge) direction. When the LCO has been initiated, displacement amplitudes and resulting power generation are measured.

Citation Download Citation

Jasper Chen, Adit Dhanushkodi, and Christopher L. Lee "Energy harvesting measurements from stall flutter limit cycle oscillations", Proc. SPIE 9057, Active and Passive Smart Structures and Integrated Systems 2014, 90570G (1 April 2014); https://doi.org/10.1117/12.2045233

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