A Review on the New Structure of Savonius Wind Turbines

Tang, Zhi Peng; Yao, Ying Xue; Zhou, Liang; Yu, Bo Wen

doi:10.4028/www.scientific.net/amr.608-609.467

Cited by 9 publications

(8 citation statements)

References 31 publications

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“…The horizontal-axis wind turbine (HAWT) with rotors operating on the lift type model offers better performance results in terms of torque and power. The vertical-axis wind turbine (VAWT) with drag-type rotor models provides lower performance values, but they benefit from constructive cost advantages, an easy starting possibility, and operation at lower wind velocities [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Review of Specific Performance Parameters of Vertical Wind Turbine Rotors Based on the SAVONIUS Type

2021

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Increasing energy demand and environmental regulations around the world provide an adequate framework for developing methods of obtaining energy from renewable sources. Wind force is a resource with a high potential through which green energy can be obtained with no negative impact on the environment. Different turbine typologies have been developed, which can convert the wind force into mechanical and electrical energy through turbine rotational motion. Starting from the classic vertical-axis SAVONIUS rotor model, other models have been designed, which, according to the numerical studies and experimental test results, show higher performance parameters in operation. Such models present specific rotor blade geometries to achieve better operational results in terms of shaft torque and generated power. There are multiple research results from numerical analysis on virtual models or experimental tests that use rotor models in different constructive configurations aiming to improve operation performance. These research activities are related to the rotor blade number, the aspect and overlap ratio values, the blade profile geometry modification, the use of end plates connected to the rotor blades, curtain mounting solutions for directing the air flow on the active blade alone, and rotor constructive variants with deformable blades during operation. Some of the results obtained from the mentioned research activities are shown in this review for special rotor configurations whose performance results in terms of torque or power values are compared to the classical SAVONIUS model.

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Section: Introductionmentioning

confidence: 99%

Review of Specific Performance Parameters of Vertical Wind Turbine Rotors Based on the SAVONIUS Type

2021

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“…In the recent three decades, the wind turbines have again started to spread all over the globe, due to the energy crisis (Roy and Saha 2013a). The main component of a wind energy conversion system is the wind turbine, which can be classified based on its rotation axis alignment to horizontal axis wind turbines (HAWTs) and vertical axis wind turbines (VAWTs) (Tang et al, 2013). Among the VAWTs, Savonius rotor is popular due to its simple design and manufacture.…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic Analysis of a Three-Bladed Pivoted Savonius Wind Turbine: Wind Tunnel Testing and Numerical Simulation

Amiri

Kahrom

Teymourtash

2019

JAFM

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In this study, a three-bladed pivoted vertical axis Savonius wind turbine is subjected to numerical and experimental studies. The experiments are carried out in a subsonic open-jet type wind tunnel, where the instantaneous position of the opening/closing blades are also determined via high speed imaging. The effects of adding end plates and the rotor aspect ratio on the turbine torque and power coefficients are investigated experimentally. Results show that adding end plates greatly enhances the rotor aerodynamic performance, in terms of both the maximum power coefficient and also the working range of the turbine. Similar effects are also observed for the effects of increasing the aspect ratio. Comparing numerical results with the experimental data demonstrated that the numerical results are in a convincing agreement with the experimental data of a wind rotor with an aspect ratio of 2.0 equipped with end plates. Although there are several two-dimensional numerical simulations for the drag-based vertical axis wind turbines in the literature, the results of the current study suggests that two-dimensional numerical results are not comparable with the experimental data of the rotors with small aspect ratios, especially without end plates.

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“…The results showed that the power coefficient is different for various configurations and can be optimized with tip speed ratio. The impact of structural parameters on the performance, particularly for Savonius wind turbine, is studied by Tang et al [2]. Their findings revealed that for different structures, the maximum power coefficient can be increased by more than 30%.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Computational Analysis of a New Vertical Axis Wind Turbine, Named KIONAS

Douvi

Margaris

et al. 2017

Computation

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This paper concentrates on a new configuration for a wind turbine, named KIONAS. The main purpose is to determine the performance and aerodynamic behavior of KIONAS, which is a vertical axis wind turbine with a stator over the rotor and a special feature in that it can consist of several stages. Notably, the stator is shaped in such a way that it increases the velocity of the air impacting the rotor blades. Moreover, each stage's performance can be increased with the increase of the total number of stages. The effects of wind velocity, the various numbers of inclined rotor blades, the rotor diameter, the stator's shape and the number of stages on the performance of KIONAS were studied. A FORTRAN code was developed in order to predict the power in several cases by solving the equations of continuity and momentum. Subsequently, further knowledge on the flow field was obtained by using a commercial Computational Fluid Dynamics code. Based on the results, it can be concluded that higher wind velocities and a greater number of blades produce more power. Furthermore, higher performance was found for a stator with curved guide vanes and for a KIONAS configuration with more stages.

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A Review on the New Structure of Savonius Wind Turbines

Cited by 9 publications

References 31 publications

Review of Specific Performance Parameters of Vertical Wind Turbine Rotors Based on the SAVONIUS Type

Review of Specific Performance Parameters of Vertical Wind Turbine Rotors Based on the SAVONIUS Type

Aerodynamic Analysis of a Three-Bladed Pivoted Savonius Wind Turbine: Wind Tunnel Testing and Numerical Simulation

Numerical and Computational Analysis of a New Vertical Axis Wind Turbine, Named KIONAS

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