Abstract
Despite the valuable previous studies on energy harvesting from flutter instability, no decisive ranking still exists between fluttering generators and harvesters based on other Flow-Induced Vibration (FIV) instabilities. In the current empirical study, the hydroelastic response and the energy performance of a self-sustained NACA 0015 hydrofoil are determined and compared to those of oscillators working based on Vortex-Induced Vibration (VIV), galloping, and Wake-Induced Vibration (WIV). Moreover, the effects of an unsteady circular wake on the performance of the hydrofoil are analyzed. With the scale and the aspect ratio considered in the current study, the upstream wake slightly mitigates the FIV response, power, and efficiency of the hydrofoil. Results of the current study show that the three top energy harvesting performances belong to oscillators with instability and combined instability-resonance responses. The high-power production capability of the galloping plus the high efficiency of the VIV makes WIV of the circular oscillator the optimum option for energy harvesting. Specific galloping oscillators like triangular cross-sections can even surpass WIV of the circular oscillator. The average performance of the fluttering hydrofoil makes it the third top instability above all resonance oscillators.
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.
