Dynamic stall control on a vertical axis wind turbine aerofoil using leading-edge rod

Zhong, Junwei; Li, Jingyin; Guo, Penghua; Wang, Yu

doi:10.1016/j.energy.2019.02.176

Cited by 58 publications

(21 citation statements)

References 28 publications

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“…Another valuable numerical work of these authors was devoted to the research of three different small sizes wind turbines [18]. Zong et al [43] proposed a method of passive control of dynamic stall of Darreius wind turbine blades. The authors proposed to install a small rod in front of the leading edge of the symmetrical NACA 0018 airfoil.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of a H-Darrieus Wind Turbine for a Series of 4-Digit NACA Airfoils

2020

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The purpose of this paper is to estimate the H-Darrieus wind turbine aerodynamic performance, aerodynamic blade loads, and velocity profiles downstream behind the rotor. The wind turbine model is based on the rotor designed by McDonnell Aircraft Company. The model proposed here consists of three fixed straight blades; in the future, this model is planned to be developed with controlled blades. The study was conducted using the unsteady Reynolds averaged Navier–Stokes (URANS) approach with the k-ω shear stress transport (SST) turbulence model. The numerical two-dimensional model was verified using two other independent aerodynamic approaches: a vortex model and the extended version of the computational fluid dynamics (CFD) code FLOWer. All utilized numerical codes gave similar result of the instantaneous aerodynamic blade loads. In addition, steady-state calculations for the applied airfoils were also made using the same numerical model as for the vertical axis wind turbine (VAWT) to obtain lift and drag coefficients. The obtained values of lift and drag force coefficients, for a Reynolds number of 2.9 million, agree with the predictions of the experiment and XFOIL over a wide range of angle of attack. A maximum rotor power coefficient of 0.5 is obtained, which makes this impeller attractive from the point of view of further research. Research has shown that, if this rotor were to work with fixed blades, it is recommended to use the NACA 1418 airfoil instead of the original NACA 0018.

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Section: Introductionmentioning

confidence: 99%

Performance Analysis of a H-Darrieus Wind Turbine for a Series of 4-Digit NACA Airfoils

2020

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“…In Wang and Atılgan 3 and Wang et al, 4 the effect of the blade geometry on VAWTs was studied, and the research results indicate that a well-designed blade structure can significantly improve the performance of VAWTs under different working conditions. Arpino et al 5 used an auxiliary airfoil outside the pressure surface of a DU 06-W-200 airfoil, while Zhong et al 6 used a tiny rod at the leading edge of an NACA 0018 airfoil. Both research groups found that the aerodynamic performance of the modified airfoils was improved significantly.…”

Section: Introductionmentioning

confidence: 99%

Investigation of leading-edge slat on aerodynamic performance of wind turbine blade

Chen

Jiang

Wang

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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In this paper, the numerical simulation was used to investigate the effects of the leading-edge slat installation angles ( β for airfoils from 0° to 40° and β1 for blades from −20° to 40°) on the aerodynamic characteristics of the airfoil and the wind turbine blade. The chord length of the leading-edge slat is 0.1c (the chord length of the clean airfoil). The horizontal and vertical distances from its center to the leading edge of the clean airfoil are 0.005c and 0.009c, respectively. The results indicated that the lift coefficient could be significantly improved by the leading-edge slat (except β = 40°) when the attack angle exceeded 10.2°. For β = 0°, the lift coefficient increased the most. The trailing vortex of the leading-edge slat played an important role at the process of flow control. It could transfer kinetic energy from the bounder layer to its out-flow region. Furthermore, the vorticities of trailing vortex generated by the leading-edge slat with different installation angles were different, promoting several effects on the airfoil at the different cases. The torque of the blade with leading-edge slat (except β1 = −20°) was improved significantly as the leading-edge slat trailing-vortices became stronger with the higher wind-speeds.

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“…Recently, a series of mass dampers and similar structures considering different aerodynamic loads have been used to suppress flutter of wind turbine system. For instance, a dynamic stall model accounting for the unsteady effects was used, with a revised BEM theory demonstrated (Sabale and Gopal, 2019); the installation of a small rod in front of the leading edge of the symmetrical aerofoil as a passive control approach was proposed, based on finite element analysis, to control the dynamic stall of the Darrieus vertical-axis wind turbine (Zhong et al, 2019); vibration control of offshore wind turbine foundations using tuned liquid column dampers and tuned mass dampers was investigated to suppress the excessive vibration responses to improve the overall performance in a wide range of loading conditions (Hemmati et al, 2019). As for actuation and control for mass dampers, an ameliorative method incorporating a tuned mass damper in offshore wind turbine platform was proposed to demonstrate the improvement of the structural dynamic performance, at the same time, the Lagrange’s equations were applied to establish the structural mathematical model, then frequency tuning method and genetic algorithm (GA) were employed respectively to obtain the globally optimum damper design parameter (Yang et al, 2019); vibration control of floating wind turbines (FWT) and the influence of the tuned mass damper location on the displacements and loads of key parts of an FWT were investigated, with a complete structural model built and a six-degrees-of-freedom dynamic model established for FWT according to the Lagrange equation by considering the combined effect of the tower, platform, and damper motions (Jin et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Theoretical modeling and vibration control for pre-twisted composite blade based on LLI controller

Liu

Gong

2019

Transactions of the Institute of Measurement and Control

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Theoretical modeling and vibration control for divergent motion of thin-walled pre-twisted wind turbine blade have been investigated based on “linear quadratic Gaussian (LQG) controller using loop transfer recovery (LTR) at plant input” (LLI). The blade section is a single-celled composite structure with symmetric layup configuration of circumferentially uniform stiffness (CUS), exhibiting displacements of vertical/lateral bending coupling. Flutter suppression for divergent instability is investigated, with blade driven by nonlinear aerodynamic forces. Theoretical modeling of CUS-based structure is implemented based on Hamilton variational principle of elasticity theory. The discretization of aeroelastic equations is solved by Galerkin method, with blade tip responses demonstrated. The LLI controller is characterized by LTR at the plant input. The effects of LLI controller are achieved and illustrated by displacement responses, controller responses and frequency spectrum analysis, respectively.

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Dynamic stall control on a vertical axis wind turbine aerofoil using leading-edge rod

Cited by 58 publications

References 28 publications

Performance Analysis of a H-Darrieus Wind Turbine for a Series of 4-Digit NACA Airfoils

Performance Analysis of a H-Darrieus Wind Turbine for a Series of 4-Digit NACA Airfoils

Investigation of leading-edge slat on aerodynamic performance of wind turbine blade

Theoretical modeling and vibration control for pre-twisted composite blade based on LLI controller

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