Theoretical study of the energy harvesting of a cantilever with attached prism under aeroelastic galloping

Xu-Xu, J.; Vicente-Ludlam, D.; Barrero-Gil, A.

doi:10.1016/j.euromechflu.2016.06.004

Cited by 12 publications

(8 citation statements)

References 15 publications

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“…Later on, in [3], the idea of taking advantage of the Transverse Galloping phenomenon was considered and, through analytical modeling, the role of the main parameters governing the problem, namely the geometry of the cross-section, mechanical parameters (mass, damping, stiffness) and flow velocity, was established and high energy transfer potential was proven. Since then, different concepts of energy extraction based on Transverse Galloping have appeared, with a focus on the large scale where a significant production of electric energy is desired [4], or to generate small amounts of electrical energy (of the order of milli-Watts) that can be used, for example, to supply electrical power to autonomous sensors and actuators and to avoid their dependence on batteries; see, for example, [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Enhance of Energy Harvesting from Transverse Galloping by Actively Rotating the Galloping Body

et al. 2019

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Kinematic rotary control is here proposed conceptually to enhance energy harvesting from Transverse Galloping. The effect of actively orientating the galloping body with respect to the incident flow, by imposing externally a rotation of the body proportional to the motion-induced angle of attack, is studied. To this end, a theoretical model is developed and analyzed, and numerical computations employing the Lattice Boltzmann Method are carried out. Good agreement is found between theoretical model predictions and numerical simulations results. It is found that it is possible to increase significantly the efficiency of energy harvesting with respect to the case without active rotation, which opens the path to consider this idea in practical realizations.

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Section: Introductionmentioning

confidence: 99%

Enhance of Energy Harvesting from Transverse Galloping by Actively Rotating the Galloping Body

et al. 2019

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“…In equations ( 25) and ( 26 26) represents the axial aerodynamic coefficient which was not considered in the previous modeling of PWEHs. Kluger et al [35] and Xu-Xu et al [36] have derived the mathematical models of galloping PWEHs which consider the bluff body rotation and their studies demonstrated that neglecting the rotation effect may result in very large errors. Tamura and Matsui (TM) [8] proposed a mathematical model (TM model) of VIV for a circular cross-sectional bluff body using the Birkhoff type wake-oscillator with variable length.…”

Section: Virtual Work Done By Non-conservative Forcesmentioning

confidence: 99%

“…The theoretical results were worked out using our previous GLM [26] and the proposed GNM, respectively. For comparison, here we modified the effective angle of attack in the GLM by considering the effect of the rotation of the bluff body (as in the proposed model), because the beam undergoes not only translational but rotational motions, and neglecting the rotational effect will lead to significant over-prediction of the response [1,35,36].…”

Section: Prototype No 1: Interactive Viv and Gallopingmentioning

confidence: 99%

Geometrically nonlinear model of piezoelectric wind energy harvesters based on vortex-induced vibration and galloping

Shen

et al. 2022

Smart Mater. Struct.

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The interaction between vortex-induced vibration (VIV) and galloping could enhance the performance of wind energy harvesters. Though VIV-galloping interaction may cause large amplitude wind-induced vibrations, the effects of geometrical nonlinearity were not considered in the modeling of VIV-galloping interactive piezoelectric wind energy harvesters (PWEHs). In this work, based on the extended Hamilton’s principle, a geometrically nonlinear model (GNM) of cantilevered PWEHs with VIV-galloping interaction was derived. The model includes both the transverse and axial aerodynamic forces, and considers the effect of the rotation of the bluff body on the aerodynamic forces. The aerodynamic coefficients were extracted by a piecewise polynomial fitting in a relatively large range of angle of attack for the square cross-sectional bluff body. Two flexible PWEH prototypes were fabricated and tested in a small wind tunnel to verify the proposed model. After the mechanical damping ratio of the low-coupling piezoelectric energy harvester prototypes were identified based on purely electrical measurements, the steady-state root mean square voltages of the prototypes with increasing wind speed were worked out using geometrically linear model (GLM) and the proposed GNM, respectively, and then compared with experiments. Both models can accurately predict the VIV-galloping interaction, but GNM is much more accurate than GLM at a relatively high wind speed. The proposed GNM provides a powerful tool to develop VIV-galloping interactive PWEHs.

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“…Galloping vibration can be a kind of bending vibration of the cantilever-based structure caused by the self-excitation of airflows [55][56][57][58][59]. For the VIV vibration transforming the galloping vibration, Hu et al [31,32] studied the influence of attached rods with cross-sections and equipping angles on the transformation from vortex-induced vibration to galloping vibration, and they explored the influence of attack angle on transverse force coefficients.…”

Section: Physical and Mathematical Modelmentioning

confidence: 99%

Enhancing Wind Energy Harvesting Using Passive Turbulence Control Devices

Wang

Zhou

et al. 2019

Applied Sciences

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Aiming to predict the performance of galloping piezoelectric energy harvesters, a theoretical model is established and verified by experiments. The relative error between the model and experimental results is 5.3%. In addition, the present model is used to study the AC output characteristics of the piezoelectric energy harvesting system under passive turbulence control (PTC), and the influence of load resistance on the critical wind speed, displacement, and output power under both strong and weak coupling are analyzed from the perspective of electromechanical coupling strength, respectively. The results show that the critical wind speed initially increases and then decreases with increasing load resistance. For weak and critical coupling cases, the output power firstly increases and then decreases with the increase of the load resistance, and reaches the maximum value at the optimal load. For the weak, critical, and strong coupling cases, the critical optimal load is 1.1 MΩ, 1.1 MΩ, and 3.0 MΩ, respectively. Overall, the response mechanism of the presented harvester is revealed.

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Theoretical study of the energy harvesting of a cantilever with attached prism under aeroelastic galloping

Cited by 12 publications

References 15 publications

Enhance of Energy Harvesting from Transverse Galloping by Actively Rotating the Galloping Body

Enhance of Energy Harvesting from Transverse Galloping by Actively Rotating the Galloping Body

Geometrically nonlinear model of piezoelectric wind energy harvesters based on vortex-induced vibration and galloping

Enhancing Wind Energy Harvesting Using Passive Turbulence Control Devices

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