Wind field simulation of large horizontal‐axis wind turbine system under different operating conditions

Chen, Junling; Yang, Rongchang; Ma, Ren

doi:10.1002/tal.1221

Cited by 7 publications

(6 citation statements)

References 23 publications

(28 reference statements)

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“…A mixture simulation (MS) method is proposed to generate the fluctuating wind speed as the boundary conditions in CFD predictions, combining with the weighted amplitude wave superposition (WAWS) method [15] and autoregression (AR) methods [16,17]. The new approach overcomes the defects of the abovementioned traditional methods and inherits their own advantages which guarantee the computing accuracy and efficiency simultaneously.…”

Section: The Methods For Simulating Fluctuating Windmentioning

confidence: 99%

“…Then, the energy distributions of the PSD function of the fluctuating wind are explored by the wavelet method [32] adopting the Hanning windows [33]. Therefore, the main thoughts of the MS method are listed as follows: the parts of the energy concentration are simulated by the WAWS method [15] and the parts of the energy dispersion are generated by the AR method [16]. The final simulating results of the fluctuating wind are obtained by the superposition of the simulating results by the two methods.…”

Section: The Methods For Simulating Fluctuating Windmentioning

confidence: 99%

“…Therefore, the improvement of simulating fluctuating wind speed in the inlet boundary is provided in the present study. Combining with the advantages of weighted amplitude wave superposition (WAWS) [15] and autoregression (AR) [16,17] methods with high accuracy and less time cost, respectively, a mixture simulation (MS) method is proposed and demonstrated as an efficient and accurate simulation method in the present work.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Simulation of Fluctuating Wind Effects on an Offshore Deck Structure

Zhou

Han

et al. 2017

Shock and Vibration

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The offshore structures that play a vital role in oil and gas extraction are always under complicated environmental conditions such as the random wind loads. The structural dynamic response under the harsh wind is still an important issue for the safety and reliable design of offshore structures. This study conducts an investigation to analyze the wind-induced structural response of a typical offshore deck structure. An accurate and efficient mixture simulation method is developed to simulate the fluctuating wind speed, which is then introduced as the boundary condition into numerical wind tunnel tests. Large eddy simulation (LES) is utilized to obtain the time series of wind pressures on the structural surfaces and to determine the worst working condition. Finally, the wind-induced structural responses are calculated by ANSYS Parametric Design Language (APDL). The numerically predicted wind pressures are found to be consistent with the existing experimental data, demonstrating the feasibility of the proposed methods. The wind-induced displacements have the certain periodicity and change steadily. The stresses at the top of the derrick and connections between deck and derrick are relatively larger. These methods as well as the numerical examples are expected to provide references for the wind-resistant design of the offshore structures.

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Section: The Methods For Simulating Fluctuating Windmentioning

confidence: 99%

Section: The Methods For Simulating Fluctuating Windmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical Simulation of Fluctuating Wind Effects on an Offshore Deck Structure

Zhou

Han

et al. 2017

Shock and Vibration

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“…The hybrid weighted amplitude wave superposition and proper orthogonal decomposition (POD) methods are extended to simulate the turbulent wind field of wind turbine in normal operation, in which the B‐spline surface interpolation method is used to calculate the POD eigenmodes on the blades after updating locations. The detailed procedure has been presented by Chen et al and here .only the main steps are given. First, the sampling points (S‐points) in the rotor plane and on the tower are arranged according to the requirement of computational accuracy.…”

Section: Wind‐induced Dynamic Responsementioning

confidence: 99%

Application of vector form intrinsic finite element on integrated simulation of wind turbine

Chen

Yang

Zhao

2017

Structural Design Tall Build

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Summary Large wind turbine system is a periodic time‐varying system with many rigid‐flexible coupling bodies. It is difficult to deal with the singular stiffness matrix produced by the rotation of blades via the traditional finite element method. However, the vector form intrinsic finite element (VFIFE) method can effectively solve the geometric deformation of elastic continuum, the nonlinear or discrete constitutive model, the coupling motion continuum, and rigid body. In this study, a solver program of space beam element is developed by VFIFE method, and three typical examples are chosen to verify its accuracy. And then the integrated simulation of wind turbine system is established, and its dynamic response is analyzed. The natural frequencies of the turbine system, which are obtained by modal parameter identification, can agree well with the results obtained by traditional finite element method. The weighted amplitude wave superposition method and the proper orthogonal decomposition method as well as B‐spline surface interpolation are employed to obtain the wind time series of wind turbine under the normal operation condition. The wind‐induced dynamic response of wind turbine system is calculated by VFIFE method. The numerical results can reflect the periodic influence of gravity on the internal forces of blades and the interaction between blades and the tower.

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“…The results indicate that the wind‐induced responses of a large wind turbine tower‐blade coupled structure present complicated modal responses and multimode coupling effect. Chen eta al . proposes a technique of generating turbulent wind velocities by the hybrid weighted amplitude wave superposition and proper orthogonal decomposition methods.…”

Section: Introductionmentioning

confidence: 99%

On the evaluation of wind loads for wind turbines' foundation design: Experimental and numerical investigations

Abdelkader

Aly

Rezaee

et al. 2017

Struct Design Tall Spec Build

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Summary In the past two decades, wind farms have been enjoying renewed interest as means for clean and renewable energy production. Larger and taller wind turbines are used for harvesting wind energy. In this paper, a boundary‐layer wind tunnel experiment was carried out on a model of the 5‐MW National Renewable Energy Laboratory (NREL) wind turbine, to evaluate overall wind‐induced base loadings in a parked condition. While mean and background base loadings were measured experimentally, a posttest dynamic analysis framework is developed to assess inertial loads analytically. The analytical analysis is carried out under both rigid and flexible tower‐foundation assumptions. Whenever applicable, the wind tunnel measurements are compared with NREL results, which were obtained by using the Fatigue, Aerodynamics, Structures, and Turbulence (FAST) software. The comparison shows a good agreement between the proposed approach and the available FAST results. In addition, the study indicates that the flexibility of the foundation may result in a reduced overall wind loads, due to base isolation effects. However, the assumption of a rigid foundation results in a slightly conservative base loads. This said, depending on the available foundation system, the methodology followed in the current paper remains in force and the base stiffness can be updated to permit the estimation of actual foundation loadings.

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Wind field simulation of large horizontal‐axis wind turbine system under different operating conditions

Cited by 7 publications

References 23 publications

Numerical Simulation of Fluctuating Wind Effects on an Offshore Deck Structure

Numerical Simulation of Fluctuating Wind Effects on an Offshore Deck Structure

Application of vector form intrinsic finite element on integrated simulation of wind turbine

On the evaluation of wind loads for wind turbines' foundation design: Experimental and numerical investigations

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