Investigate aerodynamic performance of wind turbine blades with vortex generators at the transition area

Wu, Zhou Ming; Chen, Tao; Wang, Haipeng; Hong-wei, Shi; Li, Mingzhou

doi:10.1177/0309524x211038542

Cited by 9 publications

(6 citation statements)

References 44 publications

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“…32 The aerodynamic properties of the blade transition region were modified to suppress surface flow segregation of the blades and increase the torque. 33 All of the above methods have been successful in addressing the overall operational performance of wind power systems, structural uncertainty, or uncertainty in external disturbances. However, wind speed is a random and discontinuous perturbation input and is difficult to predict.…”

Section: Introductionmentioning

confidence: 99%

“…A blade of a 1.5 MW wind turbine was used for the study target and a vortex generator was installed in the blade transit region 32 . The aerodynamic properties of the blade transition region were modified to suppress surface flow segregation of the blades and increase the torque 33 . All of the above methods have been successful in addressing the overall operational performance of wind power systems, structural uncertainty, or uncertainty in external disturbances.…”

Section: Introductionmentioning

confidence: 99%

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Robust control of wind turbines to reduce wind power fluctuation

Tang,

Wang,

Zhen

et al. 2024

Energy Science & Engineering

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The wind power generation system of a 5 MW horizontal axis wind turbine has a high wind energy conversion efficiency. The proportion of installed capacity in practical production applications is increasing year on year, so that the stability of its operation becomes a central factor in determining the productivity of the wind farm in question. This paper takes a 5 MW wind turbine as the research object and proposes a parameter‐adaptive robust model predictive control method to achieve self‐optimization of controller parameters through a Bayesian optimization approach. A robust model predictive control strategy, aiming to reduce the power fluctuation while maximizing the power output, is developed in this paper to enhance the dynamic economic performance under uncertain wind speed variation. A Bayesian algorithm is used in this paper to optimize the parameters of the controller. Moreover, wind speeds are simulated using TurbSim for different turbulence intensities of 5%, 10%, and 15% turbulence. Finally, the robust model predictive control toolbox in MATLAB is designed and simulated. The results show that the operational instability of the wind energy system is overcome. Meanwhile, the robustness of the wind energy system operation is improved compared to the traditional model predictive control approach.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Robust control of wind turbines to reduce wind power fluctuation

Tang,

Wang,

Zhen

et al. 2024

Energy Science & Engineering

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“…VGs are known to improve the airflow on airfoils at high AoAs [3,4]. The application of VGs on the suction surface of airfoils enhances the transfer of momentum from the freestream flow toward the airfoil surface, thus yielding a downstream shift of the flow separation point and enhanced torque of VAWTs [5]. The height of VGs is a particularly important parameter because VGs that are too high may adversely affect drag force and flow separation characteristics [4].…”

Section: Introductionmentioning

confidence: 99%

Dynamic stall of vertical-axis-wind-turbine rotor blades equipped with Gurney flaps and vortex generators

Ivanković,

Manolesos,

Jentzsch

et al. 2024

J. Phys.: Conf. Ser.

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There are many important aerodynamic phenomena on vertical axis wind turbines. Particularly relevant is flow separation that causes structural fatigue and adversely affects self-starting characteristics of VAWTs at lower wind velocities. Passive flow-control devices on VAWTs rotor blades have been commonly studied to mitigate these adverse characteristics. While there are many studies on this topic, the dynamic stall characteristics of VAWTs rotor blades equipped with Gurney flaps (GFs) and vortex generators (VGs) are not completely clear. It is accordingly the goal of the present study to investigate the aerodynamic performance of the NACA 0021 airfoils in the angle of attack range from 0º to 360º. The experiments were performed in a wind tunnel using rotor blade equipped with VG and GF devices. Experimental results encompass aerodynamic force and moment coefficients of the NACA 0021 airfoil equipped with VGs and GFs. These devices proved to improve the aerodynamic characteristics of the NACA 0021 airfoil and to reduce the adverse effects of flow separation.

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“…Generally, analyzing the flow over an object with add-on devices like a vortex generator in a wind tunnel is expensive [11,12]. The cost of the wind tunnel, measuring equipment and the number of test runs necessary for addon device optimization for drag reduction is money and time-consuming.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical analysis of vortex generators designed for utility vehicles

2023

Archives of Thermodynamics

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The main goal of today's car designers is to minimize fuel consumption in all possible ways at the same time maintaining the vehicle's performance as usual. The goal of this work is to study the effect of adding a vortex generator (VG) on the aerodynamics of the vehicle and fuel economy. Both theoretical and experimental works were carried out and the outcomes of the numerical simulations are contrasted with those of the experimental results. A utility vehicle model with a scale ratio of 1:15 was used as a test model. Experimental research has been done on the fluctuation of the coefficient of pressure, dynamic pressure, and coefficients of lift and drag with and without VG on the roof of a utility vehicle. The delta-shaped VG was put to the test both numerically and experimentally. At a velocity of 2.42 m/s, it is observed that the addition of VG can raise the pressure coefficient by about 17%. When compared to the vehicle model without vortex generators, the velocity profile of the ccomputational fluid dynamics analysis shows that at the back end of the vehicle, the wake has been minimized with VG.

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Investigate aerodynamic performance of wind turbine blades with vortex generators at the transition area

Cited by 9 publications

References 44 publications

Robust control of wind turbines to reduce wind power fluctuation

Robust control of wind turbines to reduce wind power fluctuation

Dynamic stall of vertical-axis-wind-turbine rotor blades equipped with Gurney flaps and vortex generators

Experimental and numerical analysis of vortex generators designed for utility vehicles

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