Performance improvement of Savonius rotor using multiple quarter blades – A CFD investigation

Sharma, Saurabh; Sharma, Rajesh

doi:10.1016/j.enconman.2016.08.087

Cited by 122 publications

(29 citation statements)

References 19 publications

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“…Wind Turbines (SSWT) so far; it aimed to increase the performance of Savonius wind turbines [24]. One of them by inserting an extra multiple quarter blade [25]. Their study focused on estimating and comparing power coefficient values between Savonius with the new design configuration and conventional Savonius.…”

Section: It Had Been Developed Various Profiles Of New Types Of Bladementioning

confidence: 99%

Experimental Study of Savonius Wind Turbine Performance with Blade Layer Addition

Kurniawan¹,

Tjahjana²,

Santoso³

2020

ARFMTS

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Savonius, a type of vertical axis wind turbine (VAWT), is applicable for harvesting wind energy in Indonesia, having an average wind speed of 4-5 m/s. Owning the advantages as suitable for placing in the urban areas as well as reducing the huge electricity load, the Savonius received considerable attention from researchers in making the performance improvement. Therefore, the current research provides an investigation on the effect of adding extra layers on concave blades on the performance of the Savonius wind turbine model. As the novelty, the modification of conventional Savonius turbine has been developed by adding single and multiple layer blades on the tip blade with an overlap ratio (OR) of 10 and 15%. It was tested under wind speeds of 6.46, 6.99, and 7.27 m/s, which generated by the fans blower with a 2x2 configuration. The results show that the addition of multiple layers increased the Savonius power coefficient by 22.4% and 11.2% at OR of 10 and 15%, respectively. The highest power coefficient (Cp) is found at 0.12, which obtained by the Savonius turbine with multiple layers of 90⁰ and OR of 10% configuration. It is concluded that adding the multiple layer blades enhanced the performance of Savonius wind turbines.

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Section: It Had Been Developed Various Profiles Of New Types Of Bladementioning

confidence: 99%

Experimental Study of Savonius Wind Turbine Performance with Blade Layer Addition

Kurniawan¹,

Tjahjana²,

Santoso³

2020

ARFMTS

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“…By these configurations, the coefficient of power increase significantly. A considerable improvement in the performance of Savonius rotor can be achieved by using multiple quarter blades instead of single blade as shown by S. Sharma and R. K. Sharma [14]. The twisted Savonius bucket was tested to know the optimum twisted angle of the blade.…”

Section: Savonius Turbine a Vertical Axis Wind Turbine (Vawt)mentioning

confidence: 99%

Investigations on the Effect of Radius Rotor in Combined Darrieus-Savonius Wind Turbine

Sahim

Santoso

Puspitasari

2018

International Journal of Rotating Machinery

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Renewable sources of energy, abundant in availability, are needed to be exploited with adaptable technology. For wind energy, the wind turbine is very well adapted to generate electricity. Among the different typologies, small scale Vertical Axis Wind Turbines (VAWT) present the greatest potential for off-grid power generation at low wind speeds. The combined Darrieus-Savonius wind turbine is intended to enhance the performance of the Darrieus rotor in low speed. In combined turbine, the Savonius buckets are always attached at the rotor shaft and the Darrieus blades are installed far from the shaft which have arm attaching to the shaft. A simple combined turbine offers two rotors on the same shaft. The combined turbine that consists of two Darrieus and Savonius blades was tested in wind tunnel test section with constant wind velocity and its performance was assessed in terms of power and torque coefficients. The study gives the effect of the radius ratio between Savonius and Darrieus rotor on the performance of the turbine. The results show that there is a significant influence on the turbine performance if the radius ratio was changed.

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“…Recently, the investigations on the Vertical Axis Wind Turbines (VAWTs) from researchers have increased due to the unique features of VAWTs such as simplicity, independent from wind direction and lower in cost [4][5][6][7][8]. Whereas the Horizontal Axis Wind Turbines (HAWT) have gained the main segment in the wind energy market, the VAWT technology is expected to play a key role in the near decades [9].…”

Section: Introductionmentioning

confidence: 99%

Performance of the Savonius Wind Rotor with Two Inner Blades at Low Tip Speed Ratio

Al-Ghriybah¹,

Zulkafli²,

Didane³

et al. 2020

CFDL

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The Savonius wind turbine is considered as one of the solutions for harvesting the kinetic energy from the wind in the urban areas, due to magnificent features such as, low construction cost, high starting torque, and self-starting ability especially at low wind speed. However, the conventional rotor suffers from low efficiency. Thus, modifying the configuration of the rotor may be an effective solution for providing electricity to the communities with no access to the power grid. Thus, this investigation aims to study numerically the effect of adding two inner blades on the performance of the Savonius wind rotor at low tip speed ratios (TSRs). The simulations are carried out using the two-dimensional simulation with the assist of ANSYS software. For turbulence modelling, the K-ε/realizable model was adopted in this study. Power coefficient (C p ) and torque coefficient (C t ) at various TSRs for the rotor are determined under a constant external overlap of 0.018 m. Furthermore, the effect of space between the inner blades was also investigated using three values of spacing. The simulation results show that the rotor with two inner blades performs better than the same rotor without inner blades at all tested TSRs expect at low considered values of 0.2 and 0.25. The heights Cp was 0.188 with 17.1% performance improvement at TSR = 0.4. Furthermore, the numerical results show that C p values decrease with the decrease of the space between the blades.

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Performance improvement of Savonius rotor using multiple quarter blades – A CFD investigation

Cited by 122 publications

References 19 publications

Experimental Study of Savonius Wind Turbine Performance with Blade Layer Addition

Experimental Study of Savonius Wind Turbine Performance with Blade Layer Addition

Investigations on the Effect of Radius Rotor in Combined Darrieus-Savonius Wind Turbine

Performance of the Savonius Wind Rotor with Two Inner Blades at Low Tip Speed Ratio

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