Design and simulation investigation of piezoelectric energy harvester under wake-induced vibration coupling vortex-induced vibration

This paper proposes a novel and efficient energy harvester (EH) system, for capturing simultaneously flutter and vortex-induced vibration. There exists a coupling effect between flexible spring energy harvester (FSEH) and cantilever beam energy harvester (CBEH) in aerodynamic response and output characteristic. Many prototypes of the harvester were manufactured to explore the coupling effect in a wind tunnel. The experimental results demonstrate that FSEH is mainly subjected to flutter-induced vibration and CBEH undergoes vortex-induced vibration. Disturbance of FSEH first takes place, a limited oscillation cycle then occurs, and chaos ultimately happens as airflow velocity increase. Root mean square voltages are more than 11 V for FSEH at beyond 10.52 m/s, which shows the better output performance over the existing harvesters. Vibration response and output voltage of various harvesters are mutually enhanced with each other. An enhancing ratio for FSEH-130-25 is up to 69.6% over FSEH-130-0, while the enhancing ratio for CBEH-130-30 is 198.3% compared to CBEH-0-30. Field application testing manifests that discharging time to power the pedometer is almost twice as long as the charging one for FSEH-130-25 at 14.48 m/s. The current research offers a suggestive guidance for promoting future practical application in micro airfoil aircrafts.

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Micro Windmill Piezoelectric Energy Harvester Based on Vortex-Induced Vibration in Tunnel

Energy ◽

10.1016/j.energy.2021.121734 ◽

2021 ◽

pp. 121734

Author(s):

Xiaozhen Du ◽

Mi Zhang ◽

Heng Chang ◽

Yu Wang ◽

Hong Yu

Keyword(s):

Energy Harvester ◽

Vortex Induced Vibration ◽

Piezoelectric Energy

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Modeling and Analysis of Upright Piezoelectric Energy Harvester under Aerodynamic Vortex-induced Vibration

Micromachines ◽

10.3390/mi9120667 ◽

2018 ◽

Vol 9 (12) ◽

pp. 667 ◽

Cited By ~ 6

Author(s):

Jinda Jia ◽

Xiaobiao Shan ◽

Deepesh Upadrashta ◽

Tao Xie ◽

Yaowen Yang ◽

...

Keyword(s):

Energy Harvester ◽

Beam Theory ◽

Longitudinal Direction ◽

Load Resistance ◽

Vortex Induced Vibration ◽

Modeling And Analysis ◽

Coupled Equations ◽

Output Performance ◽

Piezoelectric Energy ◽

Tip Mass

This paper presents an upright piezoelectric energy harvester (UPEH) with cylinder extension along its longitudinal direction. The UPEH can generate energy from low-speed wind by bending deformation produced by vortex-induced vibrations (VIVs). The UPEH has the advantages of less working space and ease of setting up an array over conventional vortex-induced vibration harvesters. The nonlinear distributed modeling method is established based on Euler–Bernoulli beam theory and aerodynamic vortex-induced force of the cylinder is obtained by the van der Pol wake oscillator theory. The fluid–solid–electricity governing coupled equations are derived using Lagrange’s equation and solved through Galerkin discretization. The effect of cylinder gravity on the dynamic characteristics of the UPEH is also considered using the energy method. The influences of substrate dimension, piezoelectric dimension, the mass of cylinder extension, and electrical load resistance on the output performance of harvester are studied using the theoretical model. Experiments were carried out and the results were in good agreement with the numerical results. The results showed that a UPEH configuration achieves the maximum power of 635.04 μW at optimum resistance of 250 kΩ when tested at a wind speed of 4.20 m/s. The theoretical results show that the UPEH can get better energy harvesting output performance with a lighter tip mass of cylinder, and thicker and shorter substrate in its synchronization working region. This work will provide the theoretical guidance for studying the array of multiple upright energy harvesters.

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Design, Modeling, and Experiments of the Vortex-Induced Vibration Piezoelectric Energy Harvester with Bionic Attachments

Complexity ◽

10.1155/2019/1670284 ◽

2019 ◽

Vol 2019 ◽

pp. 1-13 ◽

Cited By ~ 3

Author(s):

Zunlong Jin ◽

Guoping Li ◽

Junlei Wang ◽

Zhien Zhang

Keyword(s):

Wind Speed ◽

Wind Energy ◽

Energy Harvester ◽

Peak Voltage ◽

Vortex Induced Vibration ◽

Energy Capture ◽

Measured Voltage ◽

Piezoelectric Energy ◽

Smooth Cylinder ◽

Bionic Structure

Since the energy demand increases, the sources of fluid energy such as wind energy and marine energy have attracted widespread attention, especially vortex-induced vibrations excited by wind energy. It is well known that the lock-in effect in vortex-induced vibration can be applied to the piezoelectric energy harvester. Although numerous researches have been conducted on piezoelectric energy harvesting devices in recent years, a common problem of low bandwidth and harvesting efficiency still exists. In order to increase the response amplitude and decrease the threshold wind speed of vortex-induced vibration, a bionic attachment structure is proposed based on the experimental method. In the present work, twelve models are designed according to the size of pits and hemispheric protrusions which are added to the surface of a flexible smooth cylinder. Compared with the smooth cylinder which is taken as a carrier, the harvester with the bionic structure shows stronger energy capture performance on the whole. As the threshold speed decelerates from 1.8m/s to 1 m/s, the bandwidth, on the contrary, increases from 39.3% to 51.4%. Particularly, for the 10 mm pits structure with 5 columns, its peak voltage can reach 47 V, and its peak power can reach 1.21 mW with a resistance of 800 kΩ, 0.57 mW higher than that of the smooth cylinder. Comparatively speaking, the hemispherical projections structure figures with a much more different energy capturing characteristic. Starting from the column, the measured voltage of the hemispherical bionic harvester is much smaller than that of the smooth cylinder, with a peak voltage less than 15 V and a reducing bandwidth. However, compared with the smooth cylinder, hemispheric projections with 3 columns have a better energy capture effect with a measured voltage of 35V, a resistance of 800kΩ, and a wind speed of 3.097 m/s. Besides, its output power also enhances from 0.48 to 0.56 mW.

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A piezoelectric energy harvester with vortex induced vibration

2015 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA) ◽

10.1109/spawda.2015.7364499 ◽

2015 ◽

Author(s):

Ru-jun Song ◽

Xiao-biao Shan ◽

Jin-zhe Li ◽

Tao Xie ◽

Qi-gang Sun

Keyword(s):

Energy Harvester ◽

Vortex Induced Vibration ◽

Piezoelectric Energy

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Modeling and experimental investigation of magnetically coupling bending-torsion piezoelectric energy harvester based on vortex-induced vibration

Journal of Intelligent Material Systems and Structures ◽

10.1177/1045389x211048229 ◽

2021 ◽

pp. 1045389X2110482

Author(s):

Wentao Sui ◽

Huirong Zhang ◽

Chongqiu Yang ◽

Dan Zhang ◽

Rujun Song ◽

...

Keyword(s):

Output Power ◽

Power Output ◽

Torsion Angle ◽

Piezoelectric Layer ◽

Energy Harvester ◽

Maximum Output Power ◽

Load Resistance ◽

Maximum Output ◽

Vortex Induced Vibration ◽

Piezoelectric Energy

This paper presents a magnetically coupling bending-torsion piezoelectric energy harvester based on vortex-induced vibration from low-speed wind. The theoretical model of the energy harvester was formulated and validated by wind tunnel experiments. Numerical and experimental results showed that the power output and bandwidth of the proposed harvester are improved about 180% and 230% respectively compared with the nonmagnetic coupling harvester. Furthermore, the effects of cylinder, piezoelectric layer, load resistance, and magnetic nonlinear parameters on the harvester were investigated based on the distributed parameter model. The results showed that the length of cylinder hardly affect output power, but the diameter of cylinder presented complicated influences. The width of piezoelectric beam was negatively correlated with the torsion angle. With increasing the length of piezoelectric layer, an optimal wind velocity and load resistance can be obtained for the maximum output power. With decreasing of the distance between two magnets, the resonant bandwidth, the optimal power output, and torsion angle can be enhanced, respectively. Besides, the magnetic potential energy increased owing to the magnetically coupling, which led to the improvement of onset speed for the energy harvester. This study provides a guideline on improving the performance of bending-torsion vibration piezoelectric energy harvester.

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Design and Modeling of a Magnetic-Coupling Monostable Piezoelectric Energy Harvester Under Vortex-Induced Vibration

IEEE Access ◽

10.1109/access.2020.3000526 ◽

2020 ◽

Vol 8 ◽

pp. 108913-108927 ◽

Cited By ~ 1

Author(s):

Chengwei Hou ◽

Xiaobiao Shan ◽

Leian Zhang ◽

Rujun Song ◽

Zhengbao Yang

Keyword(s):

Energy Harvester ◽

Magnetic Coupling ◽

Vortex Induced Vibration ◽

Piezoelectric Energy

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A Multi-Mode Broadband Vibration Energy Harvester Composed of Symmetrically Distributed U-Shaped Cantilever Beams

Micromachines ◽

10.3390/mi12020203 ◽

2021 ◽

Vol 12 (2) ◽

pp. 203

Author(s):

Xiaohua Huang ◽

Cheng Zhang ◽

Keren Dai

Keyword(s):

Energy Harvester ◽

Low Frequency ◽

Experimental Results ◽

Vibration Energy ◽

Cantilever Beams ◽

Resonant Frequencies ◽

Promising Alternative ◽

Piezoelectric Energy ◽

Straight Beam ◽

Resonance Frequencies

Using the piezoelectric effect to harvest energy from surrounding vibrations is a promising alternative solution for powering small electronic devices such as wireless sensors and portable devices. A conventional piezoelectric energy harvester (PEH) can only efficiently collect energy within a small range around the resonance frequency. To realize broadband vibration energy harvesting, the idea of multiple-degrees-of-freedom (DOF) PEH to realize multiple resonant frequencies within a certain range has been recently proposed and some preliminary research has validated its feasibility. Therefore, this paper proposed a multi-DOF wideband PEH based on the frequency interval shortening mechanism to realize five resonance frequencies close enough to each other. The PEH consists of five tip masses, two U-shaped cantilever beams and a straight beam, and tuning of the resonance frequencies is realized by specific parameter design. The electrical characteristics of the PEH are analyzed by simulation and experiment, validating that the PEH can effectively expand the operating bandwidth and collect vibration energy in the low frequency. Experimental results show that the PEH has five low-frequency resonant frequencies, which are 13, 15, 18, 21 and 24 Hz; under the action of 0.5 g acceleration, the maximum output power is 52.2, 49.4, 61.3, 39.2 and 32.1 μW, respectively. In view of the difference between the simulation and the experimental results, this paper conducted an error analysis and revealed that the material parameters and parasitic capacitance are important factors that affect the simulation results. Based on the analysis, the simulation is improved for better agreement with experiments.

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