This work demonstrates an experimental study of wideband wind energy harvesting by self-sustained flow induced vibration. We fabricated a novel folded structure using PET film as a bluffbody, which was directly mounted
on a piezoelectric film to generate vibration in wind flow. The lock-in of the flow-induced vibration of the flutter was observed in our work. The vibration frequency of this device was locked at 10.8 Hz, which was its natural frequency, across a wide wind speed range from 5.8 m/s to 12.2 m/s. The continuous resonance gives this device stable output in this wide range of wind speed. Just using a small piezoelectric PVDF film of 3 cm2, the peak power output of our device can achieve 3.16 μW and keep at a high level once the self-sustained flow induced vibration occurs.