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The unsteady pressure field and the aerodynamic performances of a Savonius rotor based on the discrete vortex method

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  • Afungchui, David
  • Kamoun, Baddreddinne
  • Helali, Ali
  • Ben Djemaa, Abdellatif

Abstract

The aim of this paper is to numerically explore the non-linear two-dimensional unsteady potential flow over a Savonius rotor and to develop a code for predicting its aerodynamics performances. In the model developed, the rotor is represented in a median plane by two semicircles, displaced along their common diameter. The two semicircles can be considered to produce lifting effects. As a result, they are modelled by a collection of discrete vortices on their contours. The flow field is then governed by the Laplace equation. The versatile Neumann boundary condition, applied over the contour of the semicircles and the Kutta Joukowsky condition applied at the four extremities of the semicircles have been used in the modelling. The torque distribution of the stationary rotor and the unsteady pressure field on the blades of the rotating rotor, predicted by the code developed, have been compared and validated by some experimental data.

Suggested Citation

  • Afungchui, David & Kamoun, Baddreddinne & Helali, Ali & Ben Djemaa, Abdellatif, 2010. "The unsteady pressure field and the aerodynamic performances of a Savonius rotor based on the discrete vortex method," Renewable Energy, Elsevier, vol. 35(1), pages 307-313.
    • Handle: RePEc:eee:renene:v:35:y:2010:i:1:p:307-313
    DOI: 10.1016/j.renene.2009.04.034
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    References listed on IDEAS

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    1. Menet, Jean-Luc & Valdès, Laurent-Charles & Ménart, Bruno, 2001. "A comparative calculation of the wind turbines capacities on the basis of the L–σ criterion," Renewable Energy, Elsevier, vol. 22(4), pages 491-506.
    2. Menet, J.-L., 2004. "A double-step Savonius rotor for local production of electricity: a design study," Renewable Energy, Elsevier, vol. 29(11), pages 1843-1862.
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    Cited by:

    1. Afungchui, David & Kamoun, Badreddinne & Helali, Ali, 2014. "Vortical structures in the wake of the savonius wind turbine by the discrete vortex method," Renewable Energy, Elsevier, vol. 69(C), pages 174-179.
    2. Mohammadi, M. & Mohammadi, R. & Ramadan, A. & Mohamed, M.H., 2018. "Numerical investigation of performance refinement of a drag wind rotor using flow augmentation and momentum exchange optimization," Energy, Elsevier, vol. 158(C), pages 592-606.
    3. Damak, A. & Driss, Z. & Abid, M.S., 2013. "Experimental investigation of helical Savonius rotor with a twist of 180°," Renewable Energy, Elsevier, vol. 52(C), pages 136-142.
    4. Roy, Sukanta & Saha, Ujjwal K., 2013. "Review on the numerical investigations into the design and development of Savonius wind rotors," Renewable and Sustainable Energy Reviews, Elsevier, vol. 24(C), pages 73-83.
    5. Wang, Lu & Yeung, Ronald W., 2016. "On the performance of a micro-scale Bach-type turbine as predicted by discrete-vortex simulations," Applied Energy, Elsevier, vol. 183(C), pages 823-836.
    6. Kim, Sanghyeon & Cheong, Cheolung, 2015. "Development of low-noise drag-type vertical wind turbines," Renewable Energy, Elsevier, vol. 79(C), pages 199-208.
    7. Mohammadi, M. & Lakestani, M. & Mohamed, M.H., 2018. "Intelligent parameter optimization of Savonius rotor using Artificial Neural Network and Genetic Algorithm," Energy, Elsevier, vol. 143(C), pages 56-68.
    8. Zhou, Tong & Rempfer, Dietmar, 2013. "Numerical study of detailed flow field and performance of Savonius wind turbines," Renewable Energy, Elsevier, vol. 51(C), pages 373-381.

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