Hydrodynamic performance of a vertical-axis tidal-current turbine with different preset angles of attack


The instantaneous angle of attack on the blade has a significant effect on the hydrodynamic performance of a vertical-axis tidal-current turbine with straight blades. This paper investigates the influence of different preset angles of attack on the hydrodynamic performance of a three-bladed, vertical-axis, tidal-current turbine both experimentally and numerically. Experiments are carried out in a towing tank. This tested turbine’s solidity is 0.1146. The preset angles of attack on the blade are −3°, 0°, 3°, and 5°, in the experiments. Experimental results show that with the increase of the preset angle of attack from −3°, to 5°, the hydrodynamic performance of the turbine is improved significantly with the power coefficients being increased from 15.3% to 34.8%, respectively. Compared to the result of a 0° preset angle of attack, the performance of the turbine with positive preset angles of attack is experimentally demonstrated to be beneficial. This performance improvement is also shown by numerical simulations based on the Unsteady Reynolds Averaged Navier-Stokes (URANS) equations. In addition, the numerical results show that the optimal positive preset angle of attack is 7° for the turbine studied. The corresponding power coefficient is 38%. Beyond this optimal preset angle of attack, the hydrodynamic performance of the turbine decreases. Therefore, due to the dynamic stall phenomenon, an optimal preset angle of attack exists for any vertical-axis turbine. This value should be considered in the design of a vertical-axis tidal-current turbine.

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  1. [1]

    SHAFIEE S., TOPAL E. When will fossil fuel reserves be diminished[J]. Energy Policy, 2009, 37(1): 181–189.

    Article  Google Scholar 

  2. [2]

    SOLOMON S., PLATTNER G.-K. and KNUTTI R. et al. Irreversible climate change due to carbon dioxide emissions[J]. Proceeding of the National Academy of Sciences, 2009, 106(6): 1704–1709.

    Article  Google Scholar 

  3. [3]

    THEODORE R. T., LLEWELLYN J. Investors hunger for clean energy[J]. Harvard Business Review, 2007, 85(10): 38–40.

    Google Scholar 

  4. [4]

    LANG C. Harnessing tidal energy takes new turn[J]. IEEE Spectrum, 2003, 40(9): 13–14.

    Article  Google Scholar 

  5. [5]

    RAWLINGS W. G. Parametric characterization of an experimental vertical axis hydro turbine[D]. Master Thesis, Vancouver, Canada: University of British Columbia, 2008.

    Google Scholar 

  6. [6]

    DOUGLAS C. A., HARRISON G. P. and CHICK J. P. Life cycle assessment of the seagen marine current tur-bine[J]. Proceedings of ImechE Part M: Journal of Engineering for the Maritime Environment, 2008, 222(1): 1–12.

    Google Scholar 

  7. [7]

    LI Y., SANDER C. S. M. Numerical analysis of the characteristics of vertical axis tidal current turbines[J]. Renewable Energy, 2010, 35(2): 435–442.

    Article  Google Scholar 

  8. [8]

    LI Y., SANDER C. S. M. A discrete vortex method for simulation a stand-alone tidal-current turbine: Modeling and validation[J]. Journal of Offshore Mechanics and Arctic Engineering, 2008, 132(8): 031102.

    Google Scholar 

  9. [9]

    MATTHEW J. C., LI Y. and PATRICK J. M. A large-eddy simulation study of wake propagation and power production in an array of tidal-current turbines[C]. 9th European Wave and Tidal Energy Conference 2011. Southhampton, UK, 2011.

    Google Scholar 

  10. [10]

    WANG X. F. Marine air-hydrofoils theory[M]. Beijing, China: National Defence Industry Press, 1998(in Chinese).

    Google Scholar 

  11. [11]

    HWANG I. S., LEE Y. H. and KIM S. J. Optimization of cycloidal water turbine and the performance improvement by individual blade control[J]. Applied Energy, 2009, 86(9): 532–1540.

    Article  Google Scholar 

  12. [12]

    ZHANG Liang, SUN Ke and LI Feng-lai et al. Hydro-dynamic experimental study on new type of vertical-axis variable-pitch turbine[J]. Journal of Harbin Engineering University, 2006, 27(Suppl. 2): 346–352.

    Google Scholar 

  13. [13]

    GERONTAKOS P., LEE T. Effects of winglet dihedral on a tip vortex[J]. Journal of Aircraft, American Institute of Aeronautics and Astronautics, 2006, 43(1): 177–124.

    Google Scholar 

  14. [14]

    SOLTANI M. R., GHORBANIAN K. and NAZARI-NIA M. Experimental Investigation of the effect of various winglet shapes on the total pressure distribution behind a wing[C]. Proceeding of the 24th International Council of Aeronautical Sciences. Yokohama, Japan, 2004.

    Google Scholar 

  15. [15]

    SAEED F., PARASCHIVOIU I. and TRIFU O. et al. Inverse airfoil design method for low-speed straight-bladed darrieus-type VAWT applications[J]. Wind Engineering, 2011, 35(3): 357–368.

    Article  Google Scholar 

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Correspondence to Yan Liu 刘艳.

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Biography: ZHAO Guang (1981-), Male, Ph. D., Lecturer

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Zhao, G., Yang, Rs., Liu, Y. et al. Hydrodynamic performance of a vertical-axis tidal-current turbine with different preset angles of attack. J Hydrodyn 25, 280–287 (2013). https://doi.org/10.1016/S1001-6058(13)60364-9

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Key words

  • tidal-current turbine
  • preset angle of attack
  • tidal energy
  • numerical simulation