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access icon free Numerical investigation on the hydrodynamic performance of variable length blade tidal turbine: an attribute to enhance energy capture

  • Author(s): Farhana Arzu 1 ; Hossain Hassanpour Darvishi 2 ; Roslan Bin Hashim 1, 3 ; Pezhman Taherei Ghazvinei 4 ; Mahmudur Rahman Soeb 1
    • View affiliations
    • Affiliations: 1: Department of Civil Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia ;
      2: Department of Civil Engineering- Engineering and Management of Water Resources, Shahr-e-Qods Branch, Islamic Azad University, Tehran ;
      3: Coastal Processes Studies and Coastal Engineering Unit, Institute of Ocean and Earth Sciences (IOES), University of Malaya, 50603 Kuala Lumpur, Malaysia ;
      4: Young and Elite Researchers Club, Shahr-e-Qods Branch, Islamic Azad University, Tehran, Iran
  • Source: Volume 11, Issue 3, 22 February 2017, p. 347 – 352
    DOI:  10.1049/iet-rpg.2015.0479 , Print ISSN 1752-1416, Online ISSN 1752-1424
© The Institution of Engineering and Technology
Received 02/11/2015, Accepted 02/11/2016, Revised 28/09/2016, Published 09/11/2016

In the marine industry, it is important to improve the performance of tida turbines to reduce power generation costs. Modification of existing tidal turbine models is necessary to boost performance. The main objective of the present study is to investigate the hydrodynamic performance of a model variable length blade tidal turbine by modifying the baseline rotor to improve the performance using blade element momentum theory (BEMT). The QBlade BEMT simulation results were validated with the available published data and are in good agreement. Furthermore, the key performance parameters (i.e. thrust, moment, and power coefficient) and power output were predicted using the BEMT code for different blade configurations of the model rotor. The simulation results were compared with a standard conventional fixed blade turbine model. Based on the results from the simulations, with the increase in the rotor blade lengths, the performance parameters, particularly peak power coefficients, were observed to be improved up to 10%. The power extraction was also enhanced up to 79% below-rated tidal velocities without any loss in performance at the rated condition. Hence, the model is more efficient compared to the conventional models.

Inspec keywords: tidal power stations; rotors; turbines

Other keywords: baseline rotor; blade element momentum theory; energy capture; hydrodynamic performance; power generation costs; variable length blade tidal turbine

Subjects: Tidal power stations and plants; Power and plant engineering (mechanical engineering)

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