Recent improvements of actuator line-large-eddy simulation method for wind turbine wakes

Gao, Zhiteng; Li, Ye; Wang, Tongguang; Ke, Shitang; Li, Deshun

doi:10.1007/s10483-021-2717-8

Cited by 25 publications

(9 citation statements)

References 42 publications

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“…However, some errors remain in the prediction of the center and tip vortices due to the blade tip and root losses. The threedimensional analysis of the stall delay and the influence of the nacelle and wind turbine tower has not been considered, however [20][21][22]. Thus, in this paper, a modified actuation line model (MALM) was proposed according to the known deficiencies of the traditional ALM, based on the tip and root loss correction and the proposed airfoil three-dimensional delayed stall correction model.…”

Section: Introductionmentioning

confidence: 99%

Research on the Power Capture and Wake Characteristics of a Wind Turbine Based on a Modified Actuator Line Model

Xue

Duan²,

et al. 2022

Energies

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On a wind farm, the wake has an important impact on the performance of the wind turbines. For example, the wake of an upstream wind turbine affects the blade load and output power of the downstream wind turbine. In this paper, a modified actuator line model with blade tips, root loss, and an airfoil three-dimensional delayed stall was revised. This full-scale modified actuator line model with blades, nacelles, and towers, was combined with a Large Eddy Simulation, and then applied and validated based on an analysis of wind turbine wakes in wind farms. The modified actuator line model was verified using an experimental wind turbine. Subsequently, numerical simulations were conducted on two NREL 5 MW wind turbines with different staggered spacing to study the effect of the staggered spacing on the characteristics of wind turbines. The results show that the output power of the upstream turbine stabilized at 5.9 MW, and the output power of the downstream turbine increased. When the staggered spacing is R and 1.5R, both the power and thrust of the downstream turbine are severely reduced. However, the length of the peaks was significantly longer, which resulted in a long-term unstable power output. As the staggered spacing increased, the velocity in the central near wake of the downstream turbine also increased, and the recovery speed at the threshold of the wake slowed down. The modified actuator line model described herein can be used for the numerical simulation of wakes in wind farms.

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Section: Introductionmentioning

confidence: 99%

Research on the Power Capture and Wake Characteristics of a Wind Turbine Based on a Modified Actuator Line Model

Xue

Duan²,

et al. 2022

Energies

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“…Wind energy is identified as a major source of clean and renewable energy currently and wind turbine technology has been the primary research topic of many researchers [1,2]. In some countries, wind power plants become the fundamental infrastructures to convert the kinetic wind energy to reusable storages like electricity.…”

Section: Introductionmentioning

confidence: 99%

Dynamic analysis of geared transmission system for wind turbines with mixed aleatory and epistemic uncertainties

et al. 2022

Appl. Math. Mech.-Engl. Ed.

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This paper proposes to deal with the co-existence of mixed aleatory and epistemic uncertainties in wind turbine geared systems for more reliable and robust vibration analysis. To this end, the regression-based polynomial chaos expansion is employed to track aleatory uncertainties and the polynomial surrogate approach is developed to treat the epistemic uncertainties. This non-intrusive dual-layer framework shares the same collocation pool, which is extracted from the Legendre series. Moreover, the regression technique has been implemented in both layers to enhance calculation efficiency. Numerical validation is carried out to show the effectiveness of the proposed method. New vibration behaviors of the geared transmission system are observed and the mechanism behind is discussed in detail. The findings of this paper will contribute to the insightful understandings of such wind turbine gear systems under hybrid uncertainties and are beneficial for the condition monitoring.

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“…Krogstad et al [13,14] and Shen et al [8] performed simulations using the ALM, and compared the results with experiment. Our team has recently conducted some research on the body force distribution methods on the blade and tower, which also helps to improve the numerical accuracy of the ALM for wake simulation [15]. These works showed that the ALM can be an efficient alternative with high precision to predict wake and loads of a turbine.…”

Section: Introductionmentioning

confidence: 99%

Modelling the nacelle wake of a horizontal-axis wind turbine under different yaw conditions

Gao

Wang

et al. 2021

Renewable Energy

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Recent improvements of actuator line-large-eddy simulation method for wind turbine wakes

Cited by 25 publications

References 42 publications

Research on the Power Capture and Wake Characteristics of a Wind Turbine Based on a Modified Actuator Line Model

Research on the Power Capture and Wake Characteristics of a Wind Turbine Based on a Modified Actuator Line Model

Dynamic analysis of geared transmission system for wind turbines with mixed aleatory and epistemic uncertainties

Modelling the nacelle wake of a horizontal-axis wind turbine under different yaw conditions

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