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Accurate numerical simulation of a high solidity Wells turbine

Author

Listed:
  • Torresi, M.
  • Camporeale, S.M.
  • Strippoli, P.D.
  • Pascazio, G.

Abstract

This paper provides an accurate description of the steady three-dimensional flow-field in a high solidity Wells turbine to be used in an oscillatory water column (OWC) device for wave energy conversion. The analysis has been performed by solving numerically the incompressible Navier–Stokes equations in a non-inertial reference frame rotating with the turbine. Turbulence effects are taken into account via a Reynolds-average approach, the turbulent stresses being evaluated by means of the Spalart–Allmaras model. Using a very fine mesh, a quite good agreement with experimental data has been obtained in terms of efficiency, torque, and total pressure drop, at different flow rates. Moreover, the tip clearance has been properly modeled and the effect of the tip-gap on the turbine performance has been analyzed in details.

Suggested Citation

  • Torresi, M. & Camporeale, S.M. & Strippoli, P.D. & Pascazio, G., 2008. "Accurate numerical simulation of a high solidity Wells turbine," Renewable Energy, Elsevier, vol. 33(4), pages 735-747.
    • Handle: RePEc:eee:renene:v:33:y:2008:i:4:p:735-747
    DOI: 10.1016/j.renene.2007.04.006
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    References listed on IDEAS

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    1. Setoguchi, T. & Kinoue, Y. & Kim, T.H. & Kaneko, K. & Inoue, M., 2003. "Hysteretic characteristics of Wells turbine for wave power conversion," Renewable Energy, Elsevier, vol. 28(13), pages 2113-2127.
    2. Kim, T.H. & Setoguchi, T. & Kaneko, K. & Raghunathan, S., 2002. "Numerical investigation on the effect of blade sweep on the performance of Wells turbine," Renewable Energy, Elsevier, vol. 25(2), pages 235-248.
    3. Clément, Alain & McCullen, Pat & Falcão, António & Fiorentino, Antonio & Gardner, Fred & Hammarlund, Karin & Lemonis, George & Lewis, Tony & Nielsen, Kim & Petroncini, Simona & Pontes, M. -Teresa & Sc, 2002. "Wave energy in Europe: current status and perspectives," Renewable and Sustainable Energy Reviews, Elsevier, vol. 6(5), pages 405-431, October.
    4. Henderson, Ross, 2006. "Design, simulation, and testing of a novel hydraulic power take-off system for the Pelamis wave energy converter," Renewable Energy, Elsevier, vol. 31(2), pages 271-283.
    5. Dhanasekaran, T.S. & Govardhan, M., 2005. "Computational analysis of performance and flow investigation on wells turbine for wave energy conversion," Renewable Energy, Elsevier, vol. 30(14), pages 2129-2147.
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