CFD-based design load analysis of 5MW offshore wind turbine

Tran, Thanh Toan; Ryu, Geon-Hwa; Kim, Y. H.; Kim, D. H.

doi:10.1063/1.4765539

Cited by 12 publications

(13 citation statements)

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“…It can solve the physical problem accurately but always runs on a computer with consuming time. Despite this, many related researches on the simulation of the wind turbine have been documented by using Computational Fluid Dynamics (CFD) [6][7][8]. Besides, there also exist some other models that can always be used, including the actuator disc model [9], the actuator line model (ALM) [10], and the actuator surface model [11].…”

Section: Introductionmentioning

confidence: 99%

Study on Actuator Line Modeling of Two NREL 5-MW Wind Turbine Wakes

Zheng

2018

Applied Sciences

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Abstract:The wind turbine wakes impact the efficiency and lifespan of the wind farm. Therefore, to improve the wind plant performance, research on wind plant control is essential. The actuator line model (ALM) is proposed to simulate the wind turbine efficiently. This research investigates the National Renewable Energy Laboratory 5 Million Watts (NREL 5-MW) wind turbine wakes with Open Field Operation and Manipulation (OpenFOAM) using ALM. Firstly, a single NREL 5-MW turbine is simulated. The comparison of the power and thrust with Fatigue, Aerodynamics, Structures, and Turbulence (FAST) shows a good agreement below the rated wind speed. The information relating to wind turbine wakes is given in detail. The top working status is proved at the wind speed of 8 m/s and the downstream distance of more than 5 rotor diameters (5D). Secondly, another case with two NREL 5-MW wind turbines aligned is also carried out, in which 7D is validated as the optimum distance between the two turbines. The result also shows that the upstream wind turbine has an obvious influence on the downstream one.

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Section: Introductionmentioning

confidence: 99%

Study on Actuator Line Modeling of Two NREL 5-MW Wind Turbine Wakes

Zheng

2018

Applied Sciences

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“…where p(x) is the aerodynamic force distribution; m(x) is the blade mass distribution; g is the gravitational acceleration, and it is set as .8 / ms in this paper;  is the shaft tilt angle, and it is 5 degree here; y is the displacement y to the second derivative of time, and it can be calculated by prediction and correction of modified Euler method, given from Equation (10) to Equation (13); N0, N1 are the component of centrifugal force in 0 direction and 1 direction.…”

Section: Rotating Beam Solvermentioning

confidence: 99%

“…y is the displacement y to the second derivative of time, and it can be calculated by prediction and correction of modified Euler method, given from Equation (10) to Equation (13); N 0 , N 1 are the component of centrifugal force in 0 direction and 1 direction.…”

Section: Rotating Beam Solvermentioning

confidence: 99%

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Aeroelastic Performance Analysis of Wind Turbine in the Wake with a New Elastic Actuator Line Model

Zheng

et al. 2020

Water

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The scale of a wind turbine is getting larger with the development of wind energy recently. Therefore, the effect of the wind turbine blades deformation on its performances and lifespan has become obvious. In order to solve this research rapidly, a new elastic actuator line model (EALM) is proposed in this study, which is based on turbinesFoam in OpenFOAM (Open Source Field Operation and Manipulation, a free, open source computational fluid dynamics (CFD) software package released by the OpenFOAM Foundation, which was incorporated as a company limited by guarantee in England and Wales). The model combines the actuator line model (ALM) and a beam solver, which is used in the wind turbine blade design. The aeroelastic performances of the NREL (National Renewable Energy Laboratory) 5 MW wind turbine like power, thrust, and blade tip displacement are investigated. These results are compared with some research to prove the new model. Additionally, the influence caused by blade deflections on the aerodynamic performance is discussed. It is demonstrated that the tower shadow effect becomes more obvious and causes the power and thrust to get a bit lower and unsteady. Finally, this variety is analyzed in the wake of upstream wind turbine and it is found that the influence on the performance and wake flow field of downstream wind turbine becomes more serious.

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“…Wind turbines are affected by environmental loads such as winds, waves, and earthquakes during operation. Wind load is the main external random load borne by offshore wind turbines among them [1][2][3]. e structural vibration caused by wind load is significant, and the fatigue failure is of great importance.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Assessment of Monopile Supported Offshore Wind Turbine under Non‐Gaussian Wind Field

Rong

Cheng

et al. 2021

Shock and Vibration

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The vibration of offshore wind turbines caused by external loads is significant, which will cause fatigue damage to offshore wind turbines. Wind load is the main load during the operation period of the wind turbine, and available studies have shown that the external wind field often exhibits certain non-Gaussian characteristics. This article aims to obtain the fatigue assessment of the monopile foundation of the wind turbine under the non-Gaussian wind fields. A 5 MW wind turbine is selected in this article, and OpenFAST is applied to simulate the wind load. By comparing the Mises stress time histories of the pile foundation at a different depth, the fatigue analysis of the critical spots of the pile foundation is obtained. In the analysis of fatigue damage, the rain flow counting method is adopted, and the two-segment S-N curve is selected to analyze the fatigue life of the critical spots. The results show that, by taking the non-Gaussian characteristic of the wind field into account, the fatigue life of the monopile foundation decreases. Therefore, attention should be paid to the influence of non-Gaussian characteristics of wind fields on the fatigue life of monopile-supported wind turbines.

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CFD-based design load analysis of 5MW offshore wind turbine

Cited by 12 publications

References 0 publications

Study on Actuator Line Modeling of Two NREL 5-MW Wind Turbine Wakes

Study on Actuator Line Modeling of Two NREL 5-MW Wind Turbine Wakes

Aeroelastic Performance Analysis of Wind Turbine in the Wake with a New Elastic Actuator Line Model

Fatigue Assessment of Monopile Supported Offshore Wind Turbine under Non‐Gaussian Wind Field

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