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Cavitation simulation on horizontal axis marine current turbines

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  • Uşar, D.
  • Bal, Ş.

Abstract

In this paper, the occurrence of cavitation on horizontal axis marine current turbine blades has been investigated by numerical methods. To implicate the effects of cavitation on turbine performance, a momentum blade element method was used in conjunction with a boundary element method which adopts the section cavity lengths as inputs and computes the lift and drag coefficients of cavitating blade sections. Distribution of cavitation along the blades of marine current turbines was also modelled using a vortex lattice method. In order to assess the capability of the methods, marine current turbines tested previously under certain conditions were analyzed and the results were compared with the experimental data available in literature. Satisfactory agreement validated that the distribution of cavitation along the blade and the length of cavity at each blade section can be predicted adequately for a cavitating marine current turbine. Using the methods presented in this study, up to 30% theoretical loss in generated power is predicted for the particular case of a model turbine subjected to cavitation under specific test conditions.

Suggested Citation

  • Uşar, D. & Bal, Ş., 2015. "Cavitation simulation on horizontal axis marine current turbines," Renewable Energy, Elsevier, vol. 80(C), pages 15-25.
    • Handle: RePEc:eee:renene:v:80:y:2015:i:c:p:15-25
    DOI: 10.1016/j.renene.2015.01.060
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    References listed on IDEAS

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    1. Batten, W.M.J. & Bahaj, A.S. & Molland, A.F. & Chaplin, J.R., 2008. "The prediction of the hydrodynamic performance of marine current turbines," Renewable Energy, Elsevier, vol. 33(5), pages 1085-1096.
    2. Batten, W.M.J. & Bahaj, A.S. & Molland, A.F. & Chaplin, J.R., 2006. "Hydrodynamics of marine current turbines," Renewable Energy, Elsevier, vol. 31(2), pages 249-256.
    3. Khan, M.J. & Bhuyan, G. & Iqbal, M.T. & Quaicoe, J.E., 2009. "Hydrokinetic energy conversion systems and assessment of horizontal and vertical axis turbines for river and tidal applications: A technology status review," Applied Energy, Elsevier, vol. 86(10), pages 1823-1835, October.
    4. Bahaj, A.S. & Molland, A.F. & Chaplin, J.R. & Batten, W.M.J., 2007. "Power and thrust measurements of marine current turbines under various hydrodynamic flow conditions in a cavitation tunnel and a towing tank," Renewable Energy, Elsevier, vol. 32(3), pages 407-426.
    5. Goundar, Jai N. & Ahmed, M. Rafiuddin & Lee, Young-Ho, 2012. "Numerical and experimental studies on hydrofoils for marine current turbines," Renewable Energy, Elsevier, vol. 42(C), pages 173-179.
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