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Comparison between CFD simulations and experiments for predicting the far wake of horizontal axis tidal turbines

Comparison between CFD simulations and experiments for predicting the far wake of horizontal axis tidal turbines

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The actuator disc is a useful method for parameterising a tidal stream turbine in a solution of the Reynolds-averaged Navier–Stokes equations. An actuator disc is a region where similar forces are applied to a flow as would be imposed by a turbine. It is useful where large-scale flow characteristics are of interest, such as the far wake, free surface effects, or installation of multi-turbine arrays. This study compares the characteristics of the wake of an actuator disc, modelled using a steady solution to the Reynolds-averaged Navier–Stokes (RANS) simulated equations, with the k–ω shear stress transport (SST) turbulence model, to experimental data measured behind discs of various porosities. The results show that the wake of the experimental and modelled discs has similar characteristics; in both model and experiment, velocity in the near wake decreased as thrust coefficient increased. However, the near wake region in the experiment was shorter than simulated in the model because of near wake turbulence. This, combined with lower ambient turbulence levels in the model, meant that the far wake recovered further downstream, while showing similar overall trends in velocity and turbulence intensity.


    1. 1)
      • I. Nezu . Open-channel flow turbulence and its research prospect in the 21st century. J. Hydraul. Eng. , 229 - 246
    2. 2)
      • Gant, S., Stallard, T.: `Modelling a tidal turbine in unsteady flow', Proc. Int. Society Offshore and Polar Engineers, 2008, Vancouver, Canada.
    3. 3)
      • Blunden, L.S., Batten, W.M.J., Harrison, M.E., Bahaj, A.S.: `Comparison of boundary-layer and field models for simulation of flow through multiple-row tidal fences', Proc. Eighth European Wave and Tidal Energy Conf., 2009, Uppsala, Sweden, p. 576–585.
    4. 4)
      • X.J. Sun , P. Chick , I.G. Bryden . Laboratory-scale simulation of energy extraction from tidal currents. Renew. Energy , 267 - 1274
    5. 5)
      • Connel, J.R., George, R.L.: `The wake of the MOD-0A1 wind turbine at two rotor diameters downwind on 3 December 1981', Report No. PNL-4210, Pacific Northwest Laboratory, 1981, Battelle, USA.
    6. 6)
      • K.R. Dyer . (1986) Coastal and estuarine sediment dynamics.
    7. 7)
      • S.C. Jain . (2000) Open-channel flow.
    8. 8)
      • Harrison, M.E., Batten, W.M.J., Blunden, L.S., Myers, L.E., Bahaj, A.S.: `Comparisons of a large tidal turbine array using the boundary layer and field wake interaction models', Second Int. Conf. on Ocean Energy (ICOE 2008), 2008, Brest.
    9. 9)
      • Sun, X.: `Numerical and experimental investigation of tidal current energy extraction', 2007, PhD, University of Edinburgh.
    10. 10)
      • N. Troldborg , J.N. Sorensen , R. Mikkelsen . Actuator line simulation of wake of wind turbine operating in turbulent inflow. J. Phys. Conf. Ser.
    11. 11)
      • MacLeod, A.J., Barnes, S., Rados, K.G., Bryden, I.G.: `Wake effects in tidal current turbine farms', Proc. MAREC Conf., September 2002, Newcastle, p. 49–53.
    12. 12)
      • Mason-Jones, A., O'Doherty, T., O'Doherty, D.M., Evans, P.S., Wooldridge, P.S.: `Characterisation of a HATT using CFD and ADCP site data', Proc. World Renewable Energy Congress (WREC-X), 2008, Glasgow, Scotland, p. 941–946.
    13. 13)
      • G.I. Taylor , G.K. Batchelor . (1963) The scientific papers of Sir Geoffrey Ingram Taylor, The scientific papers of Six Geoffrey Ingram Taylor.
    14. 14)
      • Menter, F.R., Kuntz, M., Langtry, R.: `Ten years of industrial experience with the SST turbulence model', Proc. Fourth Int. Symp. on Turbulence Heat and Mass Transfer, 2003, p. 625–632.
    15. 15)
      • Whelan, J., Thomson, M., Graham, J.M.R., Peiro, J.: `Modelling of free surface proximity and wave induced velocities around a horizontal axis tidal stream turbine', Seventh European Wave and Tidal Energy Conf., 2007, Porto, Portugal.
    16. 16)
      • Builjtes, P.J.: `The interaction of windmill wakes', Second Int. Symp. on Wind Energy Systems, 1978, Amsterdam, Holland.
    17. 17)
      • F.R. Menter . Two-equation eddy-viscosity turbulence models for engineering applications. AIAA J. , 8 , 1598 - 1605
    18. 18)
      • ANSYS® CFX, Release 11, ANSYS Inc.
    19. 19)
      • A. Crespo , J. Hernandez , S. Frandsen . Survey of modelling methods for wind turbine wakes and wind farms. Wind Energy , 1 - 24
    20. 20)
      • Batten, W.M.J., Bahaj, A.S.: `CFD simulation of a small farm of horizontal axis marine current turbines', Proc. World Renewable Energy Congress (WREC-IX), 2006, Florence, Italy.
    21. 21)
      • P.M. Sforza , P. Sheerin , M. Smorto . Three-dimensional wakes of simulated wind turbines. AIAA J. , 9 , 1101 - 1107
    22. 22)
      • ANSYS®, ANSYS CFX, Release 11, Solver Theory Guide, ANSYS, Inc.
    23. 23)
      • F.R. Menter . A comparison of some recent eddy-viscosity turbulence models. J. Fluids Eng. , 514 - 519
    24. 24)
      • I.B. Celik , U. Ghia , P.J. Roache , C.J. Freitas , H. Coleman , P.E. Raad . Procedure for estimation and reporting of uncertainty due to discretization in CFD applications. J. Fluids Eng. , 7
    25. 25)
      • A. Crespo , J. Hernandez , S. Frandsen . Survey of modelling methods for wind turbine wakes and wind farms. Wind Energy , 1 , 1 - 24
    26. 26)
      • Myers, L.E., Bahaj, A.S., Rawlinson-Smith, R., Thomson, M.: `The effect of boundary proximity upon the wake structure of horizontal axis marine current turbines', Proc. 27th Int. Conf. on Offshore Mechanics and Arctic Engineering (OMAE 2008), 2008, Estoril, Portugal.
    27. 27)
      • L.E. Myers , A.S. Bahaj . Experimental analysis of the flow field around horizontal axis tidal turbines by use of scale mesh disk rotor simulators. Ocean Eng. , 218 - 227
    28. 28)
      • T. Burton , D. Sharpe , N. Jenkins . (2001) Wind energy handbook.
    29. 29)
      • Bai, L., Spence, R.R.G.: `Investigation of the influence of array arrangement and spacing on tidal energy converter (TEC) performance using a 3-dimensional CFD model', Proc. Eighth European Wave and Tidal Energy Conf., 2009, Uppsala, Sweden, p. 654–660.

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