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Slatted-blade Savonius wind-rotors

Author

Listed:
  • Reupke, P.
  • Probert, S. D.

Abstract

The Savonius rotor can develop a relatively high torque at low rotational speeds and is cheap to build, but it harnesses only a small fraction of the wind energy incident upon it. One initially attractive proposal for augmenting its harnessing effectiveness, was to fit an array of hinged flaps in place of the curved parts of the turbine's blades. The flaps open automatically as a result of wind pressure when they advance into the wind (and hence experience less flow-resistance), but close (again automatically) when retreating from the wind, i.e. during the power-harnessing part of the cycle. It had been found previously that this arrangement, as required, significantly enhances the static torque imposed by the wind on the rotor. So, in this study, dynamic-torque and power-harnessing tests were carried out for a Savonius rotor as well as for rotors modified with 8 or subsequently 16 hinged flaps. The modified rotors displayed slightly increased torques at low rotational speeds, but the traditional Savonius rotor developed a peak power-coefficient of 18% compared with only 5% for the slatted turbines.

Suggested Citation

  • Reupke, P. & Probert, S. D., 1991. "Slatted-blade Savonius wind-rotors," Applied Energy, Elsevier, vol. 40(1), pages 65-75.
  • Handle: RePEc:eee:appene:v:40:y:1991:i:1:p:65-75
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    Citations

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    Cited by:

    1. Faizal, Mohammed & Rafiuddin Ahmed, M. & Lee, Young-Ho, 2010. "On utilizing the orbital motion in water waves to drive a Savonius rotor," Renewable Energy, Elsevier, vol. 35(1), pages 164-169.
    2. Wong, Kok Hoe & Chong, Wen Tong & Sukiman, Nazatul Liana & Poh, Sin Chew & Shiah, Yui-Chuin & Wang, Chin-Tsan, 2017. "Performance enhancements on vertical axis wind turbines using flow augmentation systems: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 73(C), pages 904-921.
    3. Guo, Fen & Song, Baowei & Mao, Zhaoyong & Tian, Wenlong, 2020. "Experimental and numerical validation of the influence on Savonius turbine caused by rear deflector," Energy, Elsevier, vol. 196(C).
    4. Noman, Abdullah Al & Tasneem, Zinat & Sahed, Md. Fahad & Muyeen, S.M. & Das, Sajal K. & Alam, Firoz, 2022. "Towards next generation Savonius wind turbine: Artificial intelligence in blade design trends and framework," Renewable and Sustainable Energy Reviews, Elsevier, vol. 168(C).
    5. Zullah, Mohammed Asid & Lee, Young-Ho, 2013. "Performance evaluation of a direct drive wave energy converter using CFD," Renewable Energy, Elsevier, vol. 49(C), pages 237-241.
    6. Altan, Burçin Deda & Atılgan, Mehmet, 2010. "The use of a curtain design to increase the performance level of a Savonius wind rotors," Renewable Energy, Elsevier, vol. 35(4), pages 821-829.
    7. Altaf Hussain Rajpar & Imran Ali & Ahmad E. Eladwi & Mohamed Bashir Ali Bashir, 2021. "Recent Development in the Design of Wind Deflectors for Vertical Axis Wind Turbine: A Review," Energies, MDPI, vol. 14(16), pages 1-23, August.
    8. Saha, U.K. & Rajkumar, M. Jaya, 2006. "On the performance analysis of Savonius rotor with twisted blades," Renewable Energy, Elsevier, vol. 31(11), pages 1776-1788.

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