Abstract
In the context of energy harvesting we address the coupling between a flexible flag and its flagpole equipped so that it constitutes a spring-mass oscillator. An extensive set of experiments is carried out in wind tunnel for various flag and oscillator parameters. Results are analyzed in terms of frequency and amplitude of rotation of the flagpole. We report numerous configurations of coupling by frequency lock-in leading to resonance conditions. In the case of strong coupling, high amplitudes of rotation of the flagpole are reported, up to 75° peak-to-peak, over a large range of wind velocities. We also propose to characterize the strength of the coupling with a dimensionless rigidity B˜, which can be considered as the ratio of the flag bending rigidity to the stiffness of the oscillator.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
