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Tow testing of Savonius wind turbine above a bluff body complemented by CFD simulation

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  • Goh, Seach Chyr
  • Boopathy, Sethu Raman
  • Krishnaswami, Chidambaresan
  • Schlüter, Jörg Uwe

Abstract

A simple way to improve its power coefficient (cp) of a Savonius turbine is by its installation above a cuboidal building as the building will redirect the wind and increase its speed significantly. To determine the gain, a turbine was constructed and installed above a bluff body and tow tested. Detailed measurements of vehicle speed and turbine power were made. Tow test speeds were 8, 10 and 12 m/s, while TSR range was 0.6–1.1. Most importantly, wind speed at the position beside and slightly above the turbine was measured during test runs. The cp calculated using this measured wind speed was used to validate CFD simulation results. Simulation results were also used to obtain the relationships between the wind speed of the free stream and at the anemometer position. Typically, wind speed at the anemometer position is about 9% higher than those of the free stream. These relationships were used to derive the free stream wind speed of each experimental run. The cp calculated using these derived free stream wind speeds showed an increase of 25% at 12 m/s wind speed, compared to the cp reported by previous researchers for a similar turbine operating in unmodified air flow.

Suggested Citation

  • Goh, Seach Chyr & Boopathy, Sethu Raman & Krishnaswami, Chidambaresan & Schlüter, Jörg Uwe, 2016. "Tow testing of Savonius wind turbine above a bluff body complemented by CFD simulation," Renewable Energy, Elsevier, vol. 87(P1), pages 332-345.
    • Handle: RePEc:eee:renene:v:87:y:2016:i:p1:p:332-345
    DOI: 10.1016/j.renene.2015.10.015
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    References listed on IDEAS

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    1. Mohamed, M.H. & Janiga, G. & Pap, E. & Thévenin, D., 2010. "Optimization of Savonius turbines using an obstacle shielding the returning blade," Renewable Energy, Elsevier, vol. 35(11), pages 2618-2626.
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    Cited by:

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    2. Sanchez, Valentin & Pallares, Jordi & Vernet, Anton & Agafonova, Oxana & Hämäläinen, Jari, 2016. "A Multiple Actuator Block model for vertical axis wind turbines," Renewable Energy, Elsevier, vol. 99(C), pages 592-601.
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    5. Elie Antar & Amne El Cheikh & Michel Elkhoury, 2019. "A Dynamic Rotor Vertical-Axis Wind Turbine with a Blade Transitioning Capability," Energies, MDPI, vol. 12(8), pages 1-21, April.

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