Aerodynamic performance improvement analysis of Savonius Vertical Axis Wind Turbine utilizing plasma excitation flow control

Xu, Wen; Li, Chengcheng; Huang, Shengxian; Wang, Ying

doi:10.1016/j.energy.2021.122133

Cited by 27 publications

(4 citation statements)

References 34 publications

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“…Adding a GF can improve the flow field structure in the upwind region of the VAWT, resulting in a significant increase in the power coefficient at low TSR. Active control methods, such as jet [23][24][25] and plasma actuation, [26][27][28] are used to achieve flow control by injecting disturbances into the fluid boundary layer with external energy. Zhu et al 29 conducted numerical simulations of an SB-VAWT with different synthetic jet active flow strategies and found that the upward parabola synthetic jet control strategy could increase the power coefficient of the wind turbine by 15.2% when the jet momentum coefficient was 0.035.…”

Section: Introductionmentioning

confidence: 99%

Performance enhancement of an H‐Darrieus vertical axis wind turbine via moving surface boundary‐layer control

Zhang

Sun

2023

Energy Science & Engineering

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The moving surface boundary-layer control method (MSBC) is a kind of active flow control methods that overcomes the adverse pressure gradient and suppresses the flow separation by directly energizing the boundary layer near the moving surface. In this study, computational fluid dynamics simulations were performed to investigate the feasibility of using MSBC to improve the aerodynamic performance of a straight-bladed H-Darrieus vertical axis wind turbine (VAWT). In doing so, a segment of the original surface of the VAWT blade was then replaced with a moving surface. Influences of different geometric and motion parameters of moving surface, including location, length, velocity ratio, and groove depth on the net power coefficient of VAWT, were systematically studied. Moreover, the sensitivity of different parameters to the net power coefficient of VAWT at the optimal tip speed ratio was analyzed via the orthogonal design method. As a result, the optimal combination of moving surface parameters was able to be determined. The present results show that the maximum net power coefficient of VAWT having blades with partially moving surface can be increased by 22.8% compared with that of the baseline VAWT. In addition, the effectiveness of two active flow control methods, co-flow jet and moving surface, in improving aerodynamic performance of a VAWT was also compared. It is found that MSBC method has the potential to achieve superior control performance and promote the energy utilization coefficient of the VAWT more effectively by using comparatively less external energy input.

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Section: Introductionmentioning

confidence: 99%

Performance enhancement of an H‐Darrieus vertical axis wind turbine via moving surface boundary‐layer control

Zhang

Sun

2023

Energy Science & Engineering

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“…Plasma actuators' effect on improving aerodynamic efficiency has been assessed for numerous applications. However, there is inadequate research on plasma systems for wind turbine design [8][9][10], and the majority of studies on plasma system application are developed for HAWTs [11,12]. Regarding their application for HAWTs, Omidi and Mazaheri [13,14] studied the impact of a plasma actuator on an offshore 6-MW HAWT.…”

Section: Introductionmentioning

confidence: 99%

Wind Tunnel Experiment to Study Aerodynamics and Control of H-Rotor Vertical Axis Wind Turbine

Jafari

Sakib

Griffith

et al. 2022

J. Phys.: Conf. Ser.

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This study focuses on wind tunnel testing of a 3-bladed H-rotor vertical axis wind turbine (VAWT) under various conditions. Different performance metrics such as power coefficient (CP ), thrust load coefficient (CX ), and lateral load coefficient (CY ) are presented at four wind speeds. Parked loads, which are key parameters in designing VAWTs, are reported for the baseline case. Apart from presenting the benchmark results for the baseline model, the impact of two control strategies to boost the energy production of the VAWT are investigated. First, the effect of installing the plasma actuators on all blades is tested at four plasma input voltages. The results indicate that plasma actuators are an efficient approach to enhance the aerodynamic efficiency of VAWTs through modification of drag and lift loads acting on the blades. The second control strategy evaluated is intracycle RPM control. In this control method, the rotational speed of the turbine is varied with the azimuthal location of blades at each cycle so that the power production is increased. The results observed for this control strategy encourage further research development to expand the limited knowledge on its application for VAWTs.

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“…Tjahjana et al [19] assessed the influence of the slotted blades in an SWT that resulted in a 34% increase in the power coefficient. Xu et al [20] recently introduced the use of plasma excitation flow control to the SWT that enabled a significant improvement in its output torque and efficiency. Al-Ghriybah et al [21] investigated the influence of the blade spacing in an SWT that resulted in the improvement of its power coefficient by one third.…”

Section: Introductionmentioning

confidence: 99%

Savonius Wind Turbine Numerical Parametric Analysis Using Space-Filling Design and Gaussian Stochastic Process

Ubando

San

Cruz

2022

Wind

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Wind energy is an alternative source of clean energy to address the growing energy demand and provide pollution-free electricity. With the rapid development of urban areas, high wind energy resources such as high-rise building rooftops are excellent locations for urban wind turbine installation. One of the practical and simple urban wind turbines is the Savonius design. It has a simple design, easy to maintain, and is very affordable. This work focuses on the design evaluation of a Savonius wind turbine (SWT) by varying the rotor diameter, rotor height, and twist angle for urban applications. A transient computational fluid dynamics (CFD) approach is applied to assess the various design treatments using a space-filling design of experiments. To address the spaces in the hypercube statistical design, a sphere packing design method was adopted which suited the evaluation of computational simulations results such as that of the CFD. The Gaussian stochastic process model was applied to establish the trend of the parametric performance of the optimized SWT design through the model fitting. The results have shown that optimized SWT performs well with its self-starting capability compared to the traditional Savonius design. In addition, the optimized SWT has shown a better peak power coefficient compared with the results of previous works on the design of SWT.

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Aerodynamic performance improvement analysis of Savonius Vertical Axis Wind Turbine utilizing plasma excitation flow control

Cited by 27 publications

References 34 publications

Performance enhancement of an H‐Darrieus vertical axis wind turbine via moving surface boundary‐layer control

Performance enhancement of an H‐Darrieus vertical axis wind turbine via moving surface boundary‐layer control

Wind Tunnel Experiment to Study Aerodynamics and Control of H-Rotor Vertical Axis Wind Turbine

Savonius Wind Turbine Numerical Parametric Analysis Using Space-Filling Design and Gaussian Stochastic Process

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