Experimental and Numerical Investigations on Drag and Torque Characteristics of Three-Bladed Savonius Wind Turbine
01 Jan 2009-pp 85-94
TL;DR: In this paper, the aerodynamic performance of the vertical axis Savonius wind turbine has been investigated using wind tunnel analysis and computational fluid dynamics (CFD) simulation, and these results are compared with the corresponding experimental results for verification.
Abstract: With the growing demand of energy worldwide, conventional energy is becoming more and more scarce and expensive. The United States is already facing an energy crunch as the fuel price soars. Therefore, there is an obvious need for alternative sources of energy—perhaps more than ever. Wind is among the most popular and fastest-growing forms of electricity generation in the world, which is pollution free and available almost at any time of the day, especially in the coastal regions. The main attraction of the vertical-axis wind turbine is its manufacturing simplicity compared to that of the horizontal-axis wind turbine. Among all different vertical axis wind turbines, Savonius wind turbine is the simplest one. Operation of the Savonius wind turbine is based on the difference of the drag force on its semi-spherical blades, depending on whether the wind is striking the convex or the concave part of the blades. The advantage of this type of wind turbine is its good self-starting and wind directional independence characteristic. It, however, has a relatively lower efficiency in comparison with the lift type vertical-axis wind turbines. Due to its simple design and low construction cost, Savonius rotors are primarily used for water pumping and wind power on a small scale. The main objective of this ongoing research work is to improve the aerodynamic performance of vertical axis Savonius wind turbine. Wind tunnel investigation has been performed on aerodynamic characteristics, such as drag coefficients, and static torque coefficient of three-bladed Savonius rotor model. Also the computational fluid dynamics (CFD) simulation has been performed using FLUENT software to analyze the static rotor aerodynamics such as drag coefficients and torque coefficient, and these results are compared with the corresponding experimental results for verification.Copyright © 2009 by ASME
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01 Jan 2016
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...Wind energy is also the world’s fastest growing industry in electricity generation (Rahman et al., 2009)....
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01 Apr 2020
TL;DR: In this paper, the effect of wind blade number on the Savonius wind turbine performance at different wind speeds and a comparison had been made to choose the best performance between 2, 3, 4, 5 and 6 blades wind turbine.
Abstract: The long-term energy crisis is one of the biggest issues of this century that needs to be tackled to ensure a prosperous future for coming generations and wind energy is one of the energy sources that grows rapidly and most promising renewable energy. Vertical Axis Wind Turbine (VAWT) is the best option for small wind turbine project and suitable for low average wind speed environment. In this project, experiment had been carried out to study the effect of wind blade number on the Savonius wind turbine performance at different wind speeds and a comparison had been made to choose the best performance between 2, 3, 4, 5 and 6 blades wind turbine. A small Savonius wind turbine prototype, PicoScope, Digital Anemometer, Digital Tachometer and other equipment were used for this purpose. A PicoScope software with a hardware device had been used to create an oscilloscope and spectrum analyser on the PC. The experiment was carried out in an open room space to acquire a close condition to the real environment. The performance results were analysed and Malaysia's average wind speed had been used as the guideline for the comparison. It can be deduced that 5 blades rotor gives the best performance compared to the 2, 3, 4 and 6 blades rotor. At wind speed 6.1 m/s, 5 blades rotor produced optimum mechanical power output at 260 mW, power coefficient of 0.109 (10.9 %), torque at 0.12 mN.m and tip speed ratio at 8.28.
Peer Review•
TL;DR: The scope of wind innovation was investigated in this article , where the authors highlighted the significant achievements of VAWTs in terms of methodology and resource evaluation, with a focusing on their integration with urban infrastructure.
Abstract: : The scope of wind innovation was investigated in this review article. Wind energy is among the major sources of renewable energy for producing power, and its use has skyrocketed since 2000. The two most prevalent classifications for the wind turbines are the both horizontal (HAWT) and vertical (VAWT) axis wind turbine. Many countries use HAWTs for different scales scope initiatives involving energy, and they are utilized in most commercial installations around the world. HAWTs, on the other hand, is not considered a feasible solution for harnessing wind energy in metropolitan locations, where The wind isn't as fierce, un-predictable, or tumultuous as it once was. The turbine with vertical axis is indicated as a superior option for different places and manipulates semi-urban areas. Several characteristics are proposed for a non small-scale deployment of VAWTs, incorporating strong, unsteady, no noise, safety problems, and acceptable pleasing for integration in civilian settings. Several studies are published on wind turbine technology and resource evaluation methods. The presented review deals with modest attempt to highlight some of the significant breakthroughs in VAWTs, emphasizing their integration through urban infrastructure. There has been a lot of study in the field of wind power. This study has significant achievements of VAWTs in terms of methodology and resource evaluation, with a focusing on their integration with urban infrastructure. Based on the most data that are related to this subject, some ideas for future research and the use of wind turbines in urban areas have already been developed. More study is needed, according to the researchers, to make VAWTs affects, reliable, and cost-effective energy for a wide range of power
Journal Article•
TL;DR: The vertical axis windmill (VAWT) has been used for power generation in this paper and the basic reason for using VAWT is that, it does not consider the wind direction and operates at low wind speed.
Abstract: It is well known that we rely on the nonrenewable resources such as fossil fuels, oils, natural gas, etc which will certainly get exhausted some day. So keeping these items into thought we tend to thought of generating power exploitation non-conventional sources that is extravagantly accessible naturally and has zero threat for extinction. Among the various non-convention methods for generation of electric power, wind has found its place to be efficient. Wind Energy being renewable resource of energy has got much attention for power generation, nowadays. Having a nature of abundance in contrast to employment of resources in typical strategies satisfies the growing desires. Wind energy depends upon natural terrains which have wind potential, though
these terrains don't seem to be found even in nature everyplace, but those which have, are the places that can be harnessed for high potential power generation. Taking into consideration the geographical attributes of
our region, the vertical axis windmill are economical for power generation. The basic reason for using VAWT is that, it does not consider the wind direction and operates at low wind speed.