Enhancement of low-speed piezoelectric wind energy harvesting by bluff body shapes: Spindle-like and butterfly-like cross-sections

Wang, Junlei; Zhang, Chengyun; Gu, Shanghao; Yang, Kai; Li, Hang; Lai, Yuyang; Yurchenko, Daniil

doi:10.1016/j.ast.2020.105898

Cited by 77 publications

(26 citation statements)

References 53 publications

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“…Unlike conventional numerical schemes based on discretization of macroscopic Navier-Stokes equations, LBM is based on microscopic models. LBM works on a spatial discretization named lattice, consisting of a Cartesian distribution of discrete points with a discrete set of velocity directions e i (i = 1, … ,b), and has successfully simulated a range of flow conditions, including porous media, human blood flow, vortex shedding, multiphase flows, droplet dynamics and turbulent flows [29][30][31][32][33][34][35][36]. The Boltzmann transport equations in the continuum space can be written as follows:…”

Section: Numerical Simulation Methodsmentioning

confidence: 99%

Tandem-wing interactions on aerodynamic performance inspired by dragonfly hovering

et al. 2021

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Dragonflies possess two pairs of wings and the interactions between forewing (FW) and hindwing (HW) play an important role in dragonfly flight. The effects of tandem-wing (TW) interactions on the aerodynamic performance of dragonfly hovering have been investigated. Numerical simulations of single-wing hovering without interactions and TW hovering with interactions are conducted and compared. It is found that the TW interactions reduce the lift coefficient of FW and HW by 7.36% and 20.25% and also decrease the aerodynamic power and efficiency. The above effects are mainly caused by the interaction between the vortex structures of the FW and the HW, which makes the pressure of the wing surface and the flow field near the wings change. During the observations of dragonfly flight, it is found that the phase difference ( γ ) is not fixed. To explore the influence of phase difference on aerodynamic performance, TW hovering with different phase differences is studied. The results show that at γ = 22.5°, dragonflies produce the maximum lift which is more than 20% of the body weight with high efficiency; at γ = 180°, dragonflies generate the same lift as the body weight.

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Section: Numerical Simulation Methodsmentioning

confidence: 99%

Tandem-wing interactions on aerodynamic performance inspired by dragonfly hovering

et al. 2021

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“…Conventional bluff body shape is often a smooth circular cylinder, Zheng et al [27] and Wang et al [28] provided comprehensive discussions on the effects of three combinations of the circular and square crosssections, corresponding to different values of an attack angle. The dynamic characteristics of spindle-/butterfly-like [29][30] , diamond [31] , and square bluff bodies [32] were also studied. These studies showed that distinct dynamic responses could result by changing the cross-sectional configurations of bluff bodies, which is highly beneficial to the enhancement of voltage output.…”

Section: Effects Of Improved Bluff Bodies On Viv-based Energy Harvestingmentioning

confidence: 99%

Recent advancement of flow-induced piezoelectric vibration energy harvesting techniques: principles, structures, and nonlinear designs

Cao

Wang

Guo

et al. 2022

Appl. Math. Mech.-Engl. Ed.

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Energy harvesting induced from flowing fluids (e.g., air and water flows) is a well-known process, which can be regarded as a sustainable and renewable energy source. In addition to traditional high-efficiency devices (e.g., turbines and watermills), the micro-power extracting technologies based on the flow-induced vibration (FIV) effect have sparked great concerns by virtue of their prospective applications as a self-power source for the microelectronic devices in recent years. This article aims to conduct a comprehensive review for the FIV working principle and their potential applications for energy harvesting. First, various classifications of the FIV effect for energy harvesting are briefly introduced, such as vortex-induced vibration (VIV), galloping, flutter, and wake-induced vibration (WIV). Next, the development of FIV energy harvesting techniques is reviewed to discuss the research works in the past three years. The application of hybrid FIV energy harvesting techniques that can enhance the harvesting performance is also presented. Furthermore, the nonlinear designs of FIV-based energy harvesters are reported in this study, e.g., multi-stability and limit-cycle oscillation (LCO) phenomena. Moreover, advanced FIV-based energy harvesting studies for fluid engineering applications are briefly mentioned. Finally, conclusions and future outlook are summarized.

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“…For cantilevered traffic signal structures, numerical simulation techniques have also started to be used initially. In the field of wind energy utilization, Wang et al [24,25] considered changing the bluff body shapes to enhance the harvesting performance of the wind energy harvester. Jafari et al [26] investigated the wind excitation of cantilevered traffic signal structures by a time-domain-based numerical simulation method.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation Study of Vibration Characteristics of Cantilever Traffic Signal Support Structure under Wind Environment

Zhang¹,

Zhou²,

Zhao³

et al. 2023

Computer Modeling in Engineering &Amp; Sciences

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Computational fluid dynamics (CFD) and the finite element method (FEM) are used to investigate the wind-driven dynamic response of cantilever traffic signal support structures as a whole. By building a finite element model with the same scale as the actual structure and performing modal analysis, a preliminary understanding of the dynamic properties of the structure is obtained. Based on the two-way fluid-structure coupling calculation method, the wind vibration response of the structure under different incoming flow conditions is calculated, and the vibration characteristics of the structure are analyzed through the displacement time course data of the structure in the crosswind direction and along-wind direction. The results show that the maximum response of the structure increases gradually with the increase of wind speed under 90°wind direction angle, showing a vibration dispersion state, and the vibration response characteristics are following the vibration phenomenon of galloping; under 270°wind direction angle, the maximum displacement response of the structure occurs at the lower wind speed of 5 and 6 m/s, and the vibration generated by the structure is vortex vibration at this time; the displacement response of the structure in along-wind direction increases with the increase of wind speed. The along-wind displacement response of the structure will increase with increasing wind speed, and the effective wind area and shape characteristics of the structure will also affect the vibration response of the structure.

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Enhancement of low-speed piezoelectric wind energy harvesting by bluff body shapes: Spindle-like and butterfly-like cross-sections

Cited by 77 publications

References 53 publications

Tandem-wing interactions on aerodynamic performance inspired by dragonfly hovering

Tandem-wing interactions on aerodynamic performance inspired by dragonfly hovering

Recent advancement of flow-induced piezoelectric vibration energy harvesting techniques: principles, structures, and nonlinear designs

Numerical Simulation Study of Vibration Characteristics of Cantilever Traffic Signal Support Structure under Wind Environment

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