Dynamic modeling of vortex induced vibration wind turbines

Chizfahm, Amir; Yazdi, Ehsan Azadi; Eghtesad, Mohammad

doi:10.1016/j.renene.2018.01.038

Cited by 61 publications

(25 citation statements)

References 26 publications

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“…When water flow crosses the slot, such as that which exists in the hydraulic plane gate, the vortices in the slot will interact with the separated flow near the downstream corner of the slot due to local boundary mutation in the slot area, which can easily lead to flow cavitation and even endanger the safe operation of hydraulic projects [14]. The vortex-induced vibration of a blunt body or other solid boundary caused by vortex shedding has been studied most [15][16][17][18], while studies of the gate vibration induced by the vortex in the gate slot has been reported rarely.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Comparative Study on the Flow-Induced Vibration of a Plane Gate

Shen

Wang

et al. 2018

Water

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A numerical method is applied here to simulate the unstable flow and the vibration of a plane gate. A combination of the large eddy simulation (LES) method and the volume of fluid (VOF) model is used to predict the three-dimensional flow field in the vicinity of a plane gate with submerged discharge. The water surface profile, the streamline diagrams, the distribution of turbulent kinetic energy, the power spectrum density curve of the fluctuating pressure coefficient at typical points underneath the gate, and the complete vortex distribution around the gate are obtained by LES-VOF numerical calculation. The vibration parameters of the gate are calculated by the fluid-structure coupling interface transferring the hydrodynamic load. A simultaneous sampling experiment is performed to verify the validity of the algorithm. The calculated results are then compared with experimental data. The difference between the two is acceptable and the conclusions are consistent. In addition, the influence of the vortex in the slot on the flow field and the vibration of the gate are investigated. It is feasible to replace the experiment with the fluid-structure coupling computational method, which is useful for studying the flow-induced vibration mechanism of plane gates.

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Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Comparative Study on the Flow-Induced Vibration of a Plane Gate

Shen

Wang

et al. 2018

Water

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“…Several authors have modeled mechanisms using analytical methods based on Newton-Euler [31] and Lagrange [32] principles. Within the analytical models, the models of lumped parameters represent symbolically a reduction of point masses that correspond to the inertias of the elements of the mechanism, interacting springs, and dampers [7,12].…”

Section: Dynamic Modeling Of the Drive Trainmentioning

confidence: 99%

Mechatronic Modeling and Frequency Analysis of the Drive Train of a Horizontal Wind Turbine

et al. 2019

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The relevance of renewable energies is undeniable, and among them, the importance of wind energy is capital. A lot of literature has been devoted to the control techniques that deal with the optimization of the energy produced, but the maintainability of the individual wind turbines and of the farms in general is also a fundamental factor to take into account. In this paper, the authors address the general problem of knowing in advance the resonance frequencies of the power system of a wind turbine, with the underlying idea being that those frequencies should be avoided and that resonances do not occur only due to mechanical phenomena, but also because of electrical phenomena that in turn are influenced by control and optimization techniques. Therefore, the availability of that information embedded in the optimization techniques that control a wind turbine is of major importance. The main purpose of this paper was accomplished through two related objectives: the first was to obtain a mechatronic model (using a lumped parameters model of two degrees of freedom) of the drive train in the Laplace domain oriented to subsequently perform the described analysis. The second was to use that model to determine analytically the number and the value of the resonance frequencies from the generator angular velocity in such a way that such information could be used by any control algorithm or even by the mechatronic system designers. We assessed through experimental validation using a real 100 kW wind turbine that these two objectives were reached, demonstrating that the different vibration modes were detected using only the generator angular velocity.

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“…Novel models of wind turbines are being developed in order to obtain greater power, and at the same time further reduce the impact on the environment. Most new models tend to be more powerful and quieter (Møller H and Pedersen 2011;Jamieson 2018), while other models were created with greater height (Caduff et al 2012), and even models without propellers have been designed (Chizfahm et al 2018).…”

Section: -Introductionmentioning

confidence: 99%

Wind speed persistence at the Fernando de Noronha archipelago, Brazil

Silva

Stošić

2021

Preprint

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The use of wind energy has been growing worldwide continuously over the last years due to global efforts to combat climate change. The modern turbines are becoming ever more cost effective, and are gaining features that aim to reduce further the impact on the environment, such as reducing noise or increasing the height. In this context, the current study investigates the persistence of wind in Fernando de Noronha archipelago, an important Brazilian ecological site, using hourly wind speed data at 100m height. To this end, data from Era5 reanalysis were used, as they present high resolution and good performance in estimating meteorological data, and two well-known methods were applied to quantify wind persistence: duration curve and conditional probability. In addition, a novel method is proposed regarding persistence probability of periods of viable energy generation. The results obtained show that Fernando de Noronha archipelago presents rather high wind persistence on a monthly scale, with considerably long intervals of wind speed useful for wind power generation.

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Dynamic modeling of vortex induced vibration wind turbines

Cited by 61 publications

References 26 publications

Numerical and Experimental Comparative Study on the Flow-Induced Vibration of a Plane Gate

Numerical and Experimental Comparative Study on the Flow-Induced Vibration of a Plane Gate

Mechatronic Modeling and Frequency Analysis of the Drive Train of a Horizontal Wind Turbine

Wind speed persistence at the Fernando de Noronha archipelago, Brazil

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