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    Numerical simulations of wake characteristics of a horizontal axis tidal stream turbine using actuator line model.

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    Authors
    Baba-Ahmadi, Mohammad H.
    Dong, Ping
    Affiliation
    University of Dundee
    University of Liverpool
    Issue Date
    2017-06-10
    
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    Abstract
    The wake of a laboratory scale tidal stream turbine in a shallow water channel with a turbulent inflow is simulated using the hybrid LES/ALM technique, which combines large eddy simulation with the actuator line method. The turbulent inlet conditions are generated using the mapping method to avoid a precursor running and large space for saving data. The numerical results demonstrated the usefulness of the mapping technique as well as some shortcomings that still remain to be addressed. Good agreement between numerical predictions and experimental data is achieved for both the mean and turbulent characteristics of the flow behind the turbine. The examination of changes in turbulence intensity and turbulent kinetic energy in the streamwise direction confirms the existence of a peak and transition to a highly turbulent flow about three diameters downstream of the turbine, which means that the distinct characteristics of the streamwise changes of turbulence intensity or turbulent kinetic energy may serve as an effective indicator for the flow regime transition and wake behaviour.
    Citation
    Baba-Ahmadi, M.H., and Dong, P. (2017) ‘Numerical simulations of wake characteristics of a horizontal axis tidal stream turbine using actuator line model’, Renewable Energy, 113, pp. 669-678. doi: 10.1016/j.renene.2017.06.035
    Publisher
    Elsevier
    Journal
    Renewable Energy
    URI
    http://hdl.handle.net/10545/623215
    DOI
    10.1016/j.renene.2017.06.035
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S0960148117305402
    Type
    Article
    Language
    en
    ISSN
    0960-1481
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.renene.2017.06.035
    Scopus Count
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    Department of Mechanical Engineering & the Built Environment

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