Optimal blade shape of a modified Savonius turbine using an obstacle shielding the returning blade

Mohamed, Mohamed H.; Janiga, Gábor; Pap, E.; Thévenin, Dominique

doi:10.1016/j.enconman.2010.06.070

Cited by 296 publications

(123 citation statements)

References 13 publications

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“…In accordance with the simulation of Savonius wind turbine [13][14][15][16][17][18][19][20][21][22], it could draw lessons from the effective digging to the ''external potentiality'' for improving the power efficiency. In fact, the ''inner potential'' for improving power efficiency is still need to dig.…”

Section: Geometric Distribution Of Five-blade Vawtmentioning

confidence: 99%

Effect of blade installation angle on power efficiency of resistance type VAWT by CFD study

Zheng

Tian

et al. 2014

Int J Energy Environ Eng

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Renewable energy is an inevitable choice to meet the demands of energy resource. In the 21st century, one of the serious problems facings us is the energy resources that restrict the social progress and sustainable development. Environmental pollution and fossil energy resources shortage force people to explore and use new energy resources. The aim of this paper is to study the effect of blade installation angle on power coefficient of a five-blade resistance type vertical axis wind turbine using

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Section: Geometric Distribution Of Five-blade Vawtmentioning

confidence: 99%

Effect of blade installation angle on power efficiency of resistance type VAWT by CFD study

Zheng

Tian

et al. 2014

Int J Energy Environ Eng

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“…Hence, this type of turbine has limited uses for high-power applications andit is often used for wind velocimetry applications [4]. However, the greatest advantage of a Savonius rotor is its ability to self-start in contrast to other "Lift type" VAWTs [5].…”

Section: Review On Vertical Axis Wind Turbinementioning

confidence: 99%

Numerical and Experimental Investigations on Vertical Axis Wind Turbines of Different Models

Rahman¹,

Ahmed²,

Bashar³

et al. 2017

OALib

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Wind is a free and abundant energy source and conversion of wind energy to electrical energy has no negative impact to the environment. Though the harvest of energy using a horizontal axis turbine (HAWT) is extremely common worldwide, the wind speed requirement is relatively high for power generation. On the contrary, a vertical axis wind turbine (VAWT) can produce power at low wind speeds as compared to the HAWT counterpart. In addition, a VAWT can produce power regardless of the wind direction and the installation of a VAWT is simple and more cost effective than a HAWT. The purpose of the current study is to compare performances among different VAWT models using both numerical and experimental methods and find the one with the optimum performance. Standard aero-foil blade designs were considered in the current study because of their good aerodynamic characteristics. The study was performed using both computational and experimental methods. The 2D CAD design of five different VAWT models including three aero-foil blades (NACA5510, NACA7510, and NACA9510) were performed using Solid Works. CFD simulation of wind flow around these models was performed using a popular software FLUENT using the moving mesh technique. The pressure and velocity contours as well as different coefficients such as lift coefficient, drag coefficient, torque coefficient, and power coefficient were obtained from this simulation for all VAWT models. In addition, the physical models of NACA 7510, NACA 5510, and semicircular VAWTs were fabricated and tested in a subsonic wind tunnel. At three different speeds, dynamic torques were measured for all models experimentally. The current study showed that the VAWT model with NACA 7510 blade yielded the best result among all the models at a relatively high tip speed ratio (TSR).

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“…Actually, the attempt of using this curtain exclusively was made in [28], as illustrated in Figure 4a. In this context, curtain, plate and deflector are three names with the same meaning.…”

Section: Single Upstream Deflectormentioning

confidence: 99%

Upstream Flow Control for the Savonius Rotor under Various Operation Conditions

et al. 2018

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Applications of the Savonius rotor have been extended in recent years, necessitating an in-depth investigation on flow characteristics of such a fluid energy converting device. For the wake flow downstream of the Savonius rotor, studies have been reported extensively. Nevertheless, literature specifically devoted to the upstream flow of the Savonius rotor can rarely be found. This review collects and compiles findings from relevant studies to prove the significance of upstream flow patterns to the operation of the Savonius rotor. Then attempts from experimental and numerical aspects to substantiate the important effect of the upstream flow are implemented. Based on practical cases and laboratory works, upstream flow patterns for the Savonius rotor are divided into four types, namely uniform flow, guided flow, rotor wake flow and oscillating flow. Accordingly, conditions under which these upstream flow patterns arise are analyzed respectively. Experimental and numerical results are presented to clarify the influential factors underlying diverse upstream flow patterns. Furthermore, the relationship between the performance of the Savonius and the upstream flow is elucidated, facilitating the development of techniques of controlling the upstream flow. This review provides a systematic reference for the control of the upstream flow for the Savonius rotor, which has the tendency of developing into an independent technical branch.

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Optimal blade shape of a modified Savonius turbine using an obstacle shielding the returning blade

Cited by 296 publications

References 13 publications

Effect of blade installation angle on power efficiency of resistance type VAWT by CFD study

Effect of blade installation angle on power efficiency of resistance type VAWT by CFD study

Numerical and Experimental Investigations on Vertical Axis Wind Turbines of Different Models

Upstream Flow Control for the Savonius Rotor under Various Operation Conditions

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