Enhancing vortex-induced vibrations of a cylinder with rod attachments for hydrokinetic power generation

Wang, Junlei; Zhao, Wei; Su, Zhen; Zhang, Guojie; Li, Pan; Yurchenko, Daniil

doi:10.1016/j.ymssp.2020.106912

Cited by 52 publications

(17 citation statements)

References 52 publications

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“…In a separate body of work, researchers have studied aeroelastic wind energy harvesting concerned with the conversion of small-scale wind energy into electricity by exploiting aeroelastic oscillations (Barrero-Gil et al, 2010;Ewere et al, 2014;Li et al, 2011;Sirohi and Mahadik, 2012;Vicente-Ludlam et al, 2015;Wang et al, 2019Wang et al, , 2020aWang et al, , 2020bYang et al, 2013;Zhao et al, 2013;Zhao and Yang, 2015b). Examples of such aeroelasticities include vortex-induced vibration (VIV), flutter, wake galloping, galloping, turbulence-induced vibration, etc.…”

Section: Introductionmentioning

confidence: 99%

Enhanced frequency synchronization for concurrent aeroelastic and base vibratory energy harvesting using a softening nonlinear galloping energy harvester

Chen

Eager

Zhao

2021

Journal of Intelligent Material Systems and Structures

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This paper proposes a softening nonlinear aeroelastic galloping energy harvester for enhanced energy harvesting from concurrent wind flow and base vibration. Traditional linear aeroelastic energy harvesters have poor performance with quasi-periodic oscillations when the base vibration frequency deviates from the aeroelastic frequency. The softening nonlinearity in the proposed harvester alters the self-excited galloping frequency and simultaneously extends the large-amplitude base-excited oscillation to a wider frequency range, achieving frequency synchronization over a remarkably broadened bandwidth with periodic oscillations for efficient energy conversion from dual sources. A fully coupled aero-electro-mechanical model is built and validated with measurements on a devised prototype. At a wind speed of 5.5 m/s and base acceleration of 0.1 g, the proposed harvester improves the performance by widening the effective bandwidth by 300% compared to the linear counterpart without sacrificing the voltage level. The influences of nonlinearity configuration, excitation magnitude, and electromechanical coupling strength on the mechanical and electrical behavior are examined. The results of this paper form a baseline for future efficiency enhancement of energy harvesting from concurrent wind and base vibration utilizing monostable stiffness nonlinearities.

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Section: Introductionmentioning

confidence: 99%

Enhanced frequency synchronization for concurrent aeroelastic and base vibratory energy harvesting using a softening nonlinear galloping energy harvester

Chen

Eager

Zhao

2021

Journal of Intelligent Material Systems and Structures

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“…In the nature, the flowing river and air own a huge amount of kinetic energy, transforming which to electric energy has a realistic significance. Galloping energy harvester has attracted a great deal of attention, because it can oscillate dramatically if the speed of wind exceeds the critical onset one [33][34][35][36][37][38][39]. Dai et al [40,41] developed a distributed-parameter model of an electromagnetic galloping energy harvester, and the effect of magnet displacement and electromagnetic coupling is investigated by a parametric analysis.…”

Section: Introductionmentioning

confidence: 99%

Harvesting Vibration Energy and Wind Energy by a Bi-stable Harvester: Modeling and Experiments

Dong

Cao

et al. 2021

Preprint

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In realistic environments, there often appears the concurrence of base excitation and blowing wind. Harvesting both vibration energy and wind energy by an unique harvester is attractive. In this paper, we proposed a harvester integrating bi-stability and galloping to realize this aim. The nonlinear dynamical model of the bistable energy harvester under concurrent wind and base excitations is established. The galloping effects on the responses are explored based on the established model, for both harmonic and random excitations. The corresponding experiments are conducted to validate the theoretical prediction. The experimental results are consistent with the simulation results. At a wind speed of U=2 m/s, the bandwidth of large-amplitude inter-well motion of the bi-stable energy harvester is extended by about 18.5%. The critical random excitation level for snap-through is reduced by 58% and the total output voltage at random excitation is increased by 53.4%. Thus, the harvester could scavenge the wind and vibration energies at a high efficiency. These conclusions could be helpful for improving the harvesting efficiency in the real environment.

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“…Particularly, energy harvesting from flow-induced vibrations (FIVs) has become a hot topic [3,4]. Energy harvesting from FIVs includes generally vortex-induced vibration [5,6], galloping [7][8][9], and flutter and wake galloping [10,11]. Besides, energy harvesting from wave-induced vibration also calls a lot of attention; e.g., Nan Wu developed a piezoelectric coupled buoy energy harvester containing several piezoelectric coupled cantilevers attached to a floating buoy structure [12].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of the Piezoelectric Cantilever Beam Performance via Vortex-Induced Vibration to Harvest Ocean Wave Energy

Zhao

Liu

et al. 2020

Shock and Vibration

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Renewable and sustainable energies exhibit promising performance while serving as the power supply of a wireless sensor especially located in marine waters. Various microgenerators have been developed to harvest wave energy. However, the conversion ability from a dynamic oscillating source of wave is crucial to enhance their effectiveness in practical applications. In this paper, a new piezoelectric converter system is proposed to harvest the kinetic energy from ocean waves. The vortex-induced effect in an air channel enhances the vibration performance, improving the energy harvesting efficiency. The system comprises an oscillating water column (OWC) air chamber, a bluff body, and a piezoelectric piece for electromechanical transduction. The fluid–solid–electric coupling finite element method was used to investigate the relation between the output voltage and geometrical parameters, including the size and position of the piezoelectric cantilever beam, which is based on the user-defined function of the ANSYS. It is found that the bluff body in the outlet channel above the air chamber induced high-frequency vortex shedding vibration. The regular wave rushed into the air chamber with a frequency of 0.285 Hz and extruded the air across the bluff body in the outlet channel. This incurred the fluctuation of the air pressure and excited the piezoelectric cantilever beam vibration with a high frequency of 233 Hz in the wake region. Furthermore, a continuous electrical output with a peak voltage of 6.11 V is generated, which has potential applications for the wireless sensors on the marine buoy.

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Enhancing vortex-induced vibrations of a cylinder with rod attachments for hydrokinetic power generation

Cited by 52 publications

References 52 publications

Enhanced frequency synchronization for concurrent aeroelastic and base vibratory energy harvesting using a softening nonlinear galloping energy harvester

Enhanced frequency synchronization for concurrent aeroelastic and base vibratory energy harvesting using a softening nonlinear galloping energy harvester

Harvesting Vibration Energy and Wind Energy by a Bi-stable Harvester: Modeling and Experiments

Enhancement of the Piezoelectric Cantilever Beam Performance via Vortex-Induced Vibration to Harvest Ocean Wave Energy

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