Improvement of the aerodynamic performance of vertical axis wind turbines with leading-edge serrations and helical blades using CFD and Taguchi method

Wang, Zhenyu; Wang, Yu-Chen; Zhuang, Mei

doi:10.1016/j.enconman.2018.09.028

Cited by 126 publications

(40 citation statements)

References 48 publications

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“…According to previous static wind tunnel measurements of different tubercle configurations 66 , the validation test for the optimum combination of and for NACA0021 was performed by Du et al 5 on an H-Darrieus wind turbine at Reynolds number of . It was demonstrated experimentally by Du et al 5 that this bioinspired blade could significantly increase the turbine self-starting capability at the expense of slightly lower peak power output, which was consistent with the numerical studies performed by Wang and Zhuang 67 and Wang et al 68 . These blades are very promising candidates for the future application in the low wind environment.…”

Section: Blade Profilesupporting

confidence: 80%

A review of H-Darrieus wind turbine aerodynamic research

Ingram

Dominy

2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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The H-Darrieus vertical axis turbine is one of the most promising wind energy converters for locations where there are rapid variations of wind direction, such as in the built environment. The most challenging considerations when employing one of these usually small machines are to ensure that they self-start and to maintain and improve their efficiency. However, due to the turbine's rotation about a vertical axis, the aerodynamics of the turbine are more complex than a comparable horizontal axis wind turbine and our knowledge and understanding of these turbines falls remains far from complete. This paper provides a detailed review of past and current studies of the H-Darrieus turbine from the perspective of design parameters including turbine solidity, blade profile, pitch angle, etc. and particular focus is put on the crucial challenge to design a turbine that will self-start. Moreover, this paper summarizes the main research approaches for studying the turbine in order to identify successes and promising areas for future study.

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Section: Blade Profilesupporting

confidence: 80%

A review of H-Darrieus wind turbine aerodynamic research

Ingram

Dominy

2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…The notion that serrations have an important function in noise reduction was confirmed by Matthias Weger when he investigated the serrations on complete wings and on the 10th primary remiges of seven owl species [1]. Since the unsteady blade forces are of lower magnitude for a fan with sinusoidal leading edges than for a fan with straight leading edges [2], and torque fluctuations are significantly suppressed due to the passive flow control strategies implemented in the optimized vertical axis wind turbine model [3], even the effect of the stagnation point on the flow in front of the leading edge is observed to reduce drastically in the case of serrations [4]. Therefore, scientists now believe that leading-edge serrations can reduce noise.…”

Section: Introductionmentioning

confidence: 97%

The Hydrodynamic Noise Suppression of a Scaled Submarine Model by Leading-Edge Serrations

Liu

Shang

2019

JMSE

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High hydrodynamic noise is a threat to the survival of underwater vehicles. We investigated a noise suppression mechanism by putting leading-edge serrations on the sail hull of a scaled SUBOFF model, through numerical calculation and an experimental test. We found that the cone shape of leading-edge serrations can decrease the intensity of the adverse pressure gradient and produce counter-rotation vortices, which destroy the formation of the horseshoe vortex and delay the tail vortex. To achieve the optimum hydrodynamic noise reduction, we summarized the parameters of leading-edge serrations. Then, two steel models were built, according to the simulation. We measured the hydrodynamic noise based on the reverberation method in a gravity water tunnel. The numerically calculated results were validated by the experimental test. The results show that leading-edge serrations with amplitudes of 0.025c and wavelengths of 0.05h can obtain hydrodynamic noise reduction of at least 6 dB, from 10 Hz to 2 kHz, where c is the chord length and h is the height of the sail hull. The results in our study suggest a new way to design underwater vehicles with low hydrodynamic noise at a high Reynolds number.

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“…Recent studies have shown that wind energy is currently the second fastest growing source of electricity generation today as it is renewable, free and eco-friendly [4]. Thus, wind turbine power has an excellent potential to be developed all over the globe in the near future as the stream of wind flows continuously around us to make it a better choice compared to other forms of energy generation [5][6][7]. Wind turbines are found to be a strategic solution for large scale applications such as national grids and commercial scale power productions.…”

Section: Introductionmentioning

confidence: 99%

Simulation Study on the Performance of a Counter-rotating Savonius Vertical Axis Wind Turbine

Didane¹,

Anuar²,

Batcha³

et al. 2020

CFDL

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Wind power is an energy source that is becoming an alternative to burning fossil fuels that may harm the environment during operations due to the emission of harmful gases. In this study, simulation and performance investigations of a counter-rotating vertical axis wind turbine (VAWT) based on the Savonius S-type rotor have been analysed through a computational simulation approach. The foremost motive of this study is to widen the operating wind speed range of the counter-rotating concept in a VAWT while enhancing the conversion efficiency of a single-rotor VAWT system. The 3D simulations were performed based on the K-omega shear stress transport (SST) turbulence model. The results have shown that the counter-rotating model possesses better performance characteristics in terms of torque, power and their corresponding coefficients compared to a single-rotor design of a wind turbine. A maximum output of more than two times was obtained from the new CRWT system compared to that of a single-rotor wind turbine (SRWT). Moreover, the output of the top rotor was higher than the bottom rotor due to the increased higher rotational speed of the top rotor.

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Improvement of the aerodynamic performance of vertical axis wind turbines with leading-edge serrations and helical blades using CFD and Taguchi method

Cited by 126 publications

References 48 publications

A review of H-Darrieus wind turbine aerodynamic research

A review of H-Darrieus wind turbine aerodynamic research

The Hydrodynamic Noise Suppression of a Scaled Submarine Model by Leading-Edge Serrations

Simulation Study on the Performance of a Counter-rotating Savonius Vertical Axis Wind Turbine

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