Vortex induced vibrations of a cylinder at low mass ratio

Reyes, M.; Mandujano, Francisco

doi:10.1016/j.euromechflu.2021.09.012

Cited by 8 publications

(2 citation statements)

References 37 publications

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“…After adding D-type ns to the upstream PEH, the voltage of U-UPEH starts to respond at U = 3.5m/s, the voltage response increases rst and then decreases, and the voltage response basically remains unchanged between 3.5 ~ 4.5m/s wind speed, similar to the situation of traditional VIV "locking zone". However, the difference is that the cut-in speed U cut is different from the traditional vortex-induced vibration [44].…”

Section: Output Voltage Analysismentioning

confidence: 97%

Energy harvesting of flow induced vibration enhanced by bionic non-smooth surfaces

Wang

Tang

Yang

et al. 2023

Preprint

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Inspired by the shield scale on the shark surface, a D-type bionic fin with non-smooth surface is proposed and used in tandem cylinders piezoelectric energy harvesters (PEHs) for the utilization of wind energy on the roof of buildings. The repeating unit of D-type bionic fin is semicircle, and the corresponding center angle of each repeating unit is 7.2°. PEHs consist of a piezoelectric cantilever beam and a wind-interference cylinder connected to the beam tip. The influence of the spacing ratio on the amplitude of PEHs with D-type bionic fins added under elastic interference is studied through wind tunnel tests and three installation positions are designed: only installed upstream, only installed downstream, and not installed upstream and downstream (bare). It is found that the maximum amplitude response law of the upstream piezoelectric energy harvester (UPEH) is not affected by the D-type bionic fins, and the D-type bionic fins can make the downstream piezoelectric energy harvester (DPEH) realize the change of the maximum amplitude from small spacing ratio to large spacing ratio. In addition, the influence of the installation position of D-type bionic fins on the output voltage of upstream and downstream PEHs is also studied. The research shows that the addition of D-type bionic fins significantly changes the vibration behavior of PEHs. D-type bionic fins can enhance the energy harvest performance by coupling "coupled vortex-induced vibration" and wake induced galloping (WIG), and increasing the surface velocity of PEHs. D-type bionic fins can also expand the bandwidth of the voltage harvested by the PEHs. The analysis of the power under the experimental wind speed shows that the installation of D-type fins in PEHs can increase the output power of the upstream and downstream PEH by 392.28% and 13% respectively compared with the bare piezoelectric energy piezoelectric energy harvester (BARE-PEH). In addition, the computational fluid dynamics is used to analyze the flow pattern, wake structure and lift coefficient of PEHs, and the reason why the installation of D-type bionic fins in the upstream has an impact on the harvest performance of upstream and downstream PEHs at 1.5 spacing ratio is explained.

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Section: Output Voltage Analysismentioning

confidence: 97%

Energy harvesting of flow induced vibration enhanced by bionic non-smooth surfaces

Wang

Tang

Yang

et al. 2023

Preprint

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“…Recent research has delved into specific scenarios of VIV involving cylinders with varying m*. Reyes and Mandujano [17] investigated the VIV of a cylinder at low m*, exploring the dynamics under different conditions. Gonçalves et al, [18] contributed to this area by studying two degrees of freedom VIV of circular cylinders with small m*.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Different Mass Ratios on Vortex-Induced Vibration Energy Extraction of Four Cylinder Arrays

Fatin Alias,

Mohd Hairil Mohd,

Mohd Asamudin A. Rahman

2024

ARFMTS

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Currently, there is a growing demand for renewable energy harnessed from fluid dynamics within the oil and gas industry. The surge in demand has propelled electricity to become a vital and irreplaceable form of universal energy worldwide. Vortex-Induced Vibrations (VIV) energy harvesting shows great potential as a technology for capturing energy from flowing bodies of water. The purpose of this research is to investigate the numerical aspect of VIV in rigid circular cylinders with the intention of capturing renewable energy from the sea. The investigation employs a Vortex-Induced Vibration Aquatic Clean Energy (VIVACE) converter to analyze the vibration characteristics of densely packed cylinders featuring varying mass ratios (m*) at both minimum and maximum values. Another purpose of the study is to investigate the effect that m* has on the performance of a VIV converter that is comprised of four cylinders positioned in a staggered pattern. For the purpose of analyzing power conversion in the VIV energy converter model across a wide range of mass ratios (from 2.36 to 12.96), simulations are carried out with a Reynolds number of 82000. The findings indicate that the highest converted power reaches a peak of 7.48 W with a mass ratio of 2.36, whereas a greater mass ratio of 12.96 results in only 4.33. The study highlights the substantial influence of mass ratios on the extraction of power output from VIV. The results essentially offer crucial information about the optimum mass ratio in closed four cylinder arrays to design VIV energy harvesting to produce clean and renewable energy sources.

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The effect of vortex induced vibrating cylinders on airfoil aerodynamics

Chen

Yuan³

et al. 2023

Applied Mathematical Modelling

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Vortex induced vibrations of a cylinder at low mass ratio

Cited by 8 publications

References 37 publications

Energy harvesting of flow induced vibration enhanced by bionic non-smooth surfaces

Energy harvesting of flow induced vibration enhanced by bionic non-smooth surfaces

The Influence of Different Mass Ratios on Vortex-Induced Vibration Energy Extraction of Four Cylinder Arrays

The effect of vortex induced vibrating cylinders on airfoil aerodynamics

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