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

Yu, Ziying; Hu, Zhenhong; Zheng, Xing; Ma, Qingwei; Hao, Hongbin

doi:10.3390/w12051233

Cited by 18 publications

(8 citation statements)

References 32 publications

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“…For the selection of time step, the tip Courant number is set to less than 0.5, and the total calculation time usually ensures the flow field is looped for 4 to 5 times. As a result, this configuration scheme can clearly capture the development process of tip vortex and root vortex (Yu et al, 2020;Ji et al, 2022).…”

Section: Research Object and Schemementioning

confidence: 93%

“…This approach reduces the computational complexity of simulating the solid blades presence, the flow solution in the boundary layer on the blade surface, and mesh rotation strategies (sliding mesh, dynamic mesh or overset mesh) to account for blade rotation. As a result, the iteration time under each time step in the numerical simulation (Yu et al, 2020) is lower compared to bladeresolved method.…”

Section: Actuator Line Modelmentioning

confidence: 99%

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Research on complex wake interference of aligned rotors considering the precone variation of the upstream wind turbine

Zhang

Sun

et al. 2022

Front. Mar. Sci.

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To understand the interaction wake effects of aligned horizontal-axis wind turbines, a refined and low-cost wake simulation framework is developed by combining the actuator line (AL) with a local dynamic Smagorinsky (LDS) model. Firstly, the published performance of the NREL-5MW wind turbine is used to corroborate the accuracy of the AL-LDS coupling model. Secondly, the research is extended to predict the interference between two tandem rotor wakes. The influence of the precone characteristics on the overall wake and power output of the tandem wind turbines is explored by modifying the upstream wind turbine and introducing the latest third-generation Ω vortex identification method in the post-processing procedure. According to results, the tandem wind turbines have complex wake interference, with the precone angle variation always reducing the global output power, and leading to an unstable downstream turbine wake. This is detrimental to system lifespan due to high performance fluctuation and stress and as well may have ecological implications due to sediment alteration. From results, an upwind turbine with precone angle (negative) can lead to higher downstream but lower upstream turbine performance, compared with a non-tilted turbine. Despite the optimal precone angle of the upstream wind turbine is 0°, a -2.5° proves more advantageous owing to the large flexible deformation of the turbine wingtips. The findings can serve as a continuous incentive for improving wind farm numerical simulation.

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Section: Research Object and Schemementioning

confidence: 93%

Section: Actuator Line Modelmentioning

confidence: 99%

Research on complex wake interference of aligned rotors considering the precone variation of the upstream wind turbine

Zhang

Sun

et al. 2022

Front. Mar. Sci.

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“…3) The floating foundation makes micro amplitude simple harmonic vibration near its equilibrium position, which simplifies the force and motion of the floating foundation under the action of waves into a linear problem, which is applicable to the superposition principle (Merz, et al, 2009; Frontiers in Environmental Science frontiersin.org Pu et al, 2012;Ning, et al, 2018;Yu et al, 2020;Ma et al, 2022;Yu et al, 2022). Considering only the first-order velocity potential, the frequency domain motion equation of floating platform under the action of inertia force, damping force, hydrostatic restoring force, mooring system restoring force and first-order wave force is established according to the principle of dynamic force balance:…”

Section: Potential Flow Methodsmentioning

confidence: 99%

Motion characteristics and aero-elastic responses of floating offshore wind turbine under coupling action of waves and winds

Wang

Liu

Gao

et al. 2022

Front. Environ. Sci.

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As a complex multi degree of freedom coupling system, floating offshore wind turbine usually works in complex and changeable marine environment. The research of floating offshore wind turbine often needs to consider the coupling effect of wind, wave and current at the same time. Under the action of wind and wave load, floating offshore wind turbine will produce a large motion response. Generally, the surge motion and pitch motion are the most obvious aspects, and their motion amplitude is also the largest, and large-scale motion of the floating platform will directly affect the relative velocity of the wind loaded flow. Therefore, the surge motion and pitch motion usually have the most obvious impact on the aerodynamic load of wind turbine. In this paper, the motion characteristics and aeroelastic responses of the DTU-10MW semi-floating offshore wind turbine under coupling action of wind and wave are simulated. The motion characteristics and aeroelastic responses of floating offshore wind turbine are calculated under different wind and wave combination conditions, and the influence law of wind and wave action are summarized. The results show that wind load affects the mean value of motion of the floating offshore wind turbine, and wave load affects the amplitude of motion; Finally, the dynamic response of the wind turbine with the included angle of the wind and wave load is discussed and analyzed, and the influence of the incident angle of the wind wave on the motion response of the floating offshore wind turbine is analyzed.

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“…Last but not the least, aligned with the modern needs to identify renewable energy/energy efficiency and expand energy access, Yu et al [54] focused on wind turbines and the effect of turbine blade deformations with relevant lifespan issues. The developed technique combined the actuator line model (ALM) with a beam solver for use in the wind turbine blade design.…”

Section: Summary Of This Special Issuementioning

confidence: 99%

Advances in Modelling and Prediction on the Impact of Human Activities and Extreme Events on Environments

Rubinato

Luo

Zheng

et al. 2020

Water

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Fast urbanization and industrialization have progressively caused severe impacts on mountainous, river, and coastal environments, and have increased the risks for people living in these areas. Human activities have changed ecosystems hence it is important to determine ways to predict these consequences to enable the preservation and restoration of these key areas. Furthermore, extreme events attributed to climate change are becoming more frequent, aggravating the entire scenario and introducing ulterior uncertainties on the accurate and efficient management of these areas to protect the environment as well as the health and safety of people. In actual fact, climate change is altering rain patterns and causing extreme heat, as well as inducing other weather mutations. All these lead to more frequent natural disasters such as flood events, erosions, and the contamination and spreading of pollutants. Therefore, efforts need to be devoted to investigate the underlying causes, and to identify feasible mitigation and adaptation strategies to reduce negative impacts on both the environment and citizens. To contribute towards this aim, the selected papers in this Special Issue covered a wide range of issues that are mainly relevant to: (i) the numerical and experimental characterization of complex flow conditions under specific circumstances induced by the natural hazards; (ii) the effect of climate change on the hydrological processes in mountainous, river, and coastal environments, (iii) the protection of ecosystems and the restoration of areas damaged by the effects of climate change and human activities.

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

Cited by 18 publications

References 32 publications

Research on complex wake interference of aligned rotors considering the precone variation of the upstream wind turbine

Research on complex wake interference of aligned rotors considering the precone variation of the upstream wind turbine

Motion characteristics and aero-elastic responses of floating offshore wind turbine under coupling action of waves and winds

Advances in Modelling and Prediction on the Impact of Human Activities and Extreme Events on Environments

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