Experimental Investigation on a Novel Airfoil-Based Piezoelectric Energy Harvester for Aeroelastic Vibration
State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150001, China
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Micromachines 2020, 11(8), 725; https://doi.org/10.3390/mi11080725
Received: 9 June 2020
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Revised: 8 July 2020
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Accepted: 24 July 2020
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Published: 26 July 2020
(This article belongs to the Section E：Engineering and Technology)
This paper presents a novel airfoil-based piezoelectric energy harvester (EH) with two small square prisms attached to an airfoil. This harvester can achieve a two degree-of-freedom (DOF) plunge–pitch motions. Several prototypes of energy harvester were fabricated to explore the nonlinear aerodynamic response and the output performance in a wind tunnel. The experimental results showed that the longer the flexible spring was, the lower the critical velocity and frequency of the harvester were, and the better aerodynamic response and output performance could be achieved. The initial disturbance, the following limit-cycle oscillation, and the ultimate chaos of nonlinear response occurred, as increasing airflow velocity was increased. The overall output performance of the harvesters with a flexible spring having a thickness of 1 mm outperformed than that of the harvesters with a flexible spring having a thickness of 0.5 mm at a higher airflow velocity, while the tendency was opposite at a lower velocity. An optimum output voltage of 17.48 V and a power of 0.764 mW were harvested for EH-160-1 at 16.32 m/s, which demonstrated it possessed better performance than the other harvesters. When the capacitor was charged for 45 s and directly drove a sensor, it could maintain working for 17 s to display temperature and humidity in real time.
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Keywords:
nonlinear aeroelastic vibration; limit-cycle oscillation; piezoelectric energy harvester; harvesting performance; field testing
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MDPI and ACS Style
Shan, X.; Tian, H.; Cao, H.; Feng, J.; Xie, T. Experimental Investigation on a Novel Airfoil-Based Piezoelectric Energy Harvester for Aeroelastic Vibration. Micromachines 2020, 11, 725. https://doi.org/10.3390/mi11080725
AMA Style
Shan X, Tian H, Cao H, Feng J, Xie T. Experimental Investigation on a Novel Airfoil-Based Piezoelectric Energy Harvester for Aeroelastic Vibration. Micromachines. 2020; 11(8):725. https://doi.org/10.3390/mi11080725
Chicago/Turabian StyleShan, Xiaobiao, Haigang Tian, Han Cao, Ju Feng, and Tao Xie. 2020. "Experimental Investigation on a Novel Airfoil-Based Piezoelectric Energy Harvester for Aeroelastic Vibration" Micromachines 11, no. 8: 725. https://doi.org/10.3390/mi11080725
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