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http://dx.doi.org/10.7846/JKOSMEE.2012.15.2.142

Development of Hydrodynamic Capacity Evaluation Method for a Vertical-Axis Tidal Stream Turbine  

Lee, D.H (Tidal Stream Energy Research Center, Korea Maritime Univ.)
Hyun, B.S. (Div. of Naval Architecture & Ocean Systems Eng., Korea Maritime Univ.)
Lee, J.K. (Div. of Naval Architecture & Ocean Systems Eng., Korea Maritime Univ.)
Kim, M.C. (Department of Naval Architecture & Ocean Eng., Pusan National Univ.)
Rhee, S.H. (Department of Naval Architecture & Ocean Eng., Seoul National Univ.)
Publication Information
Journal of the Korean Society for Marine Environment & Energy / v.15, no.2, 2012 , pp. 142-149 More about this Journal
Abstract
This study deals with the investigation of the scale effect for the vertical-axis tidal stream turbine by evaluating the hydrodynamic efficiency of turbine rotors of different diameters at different flow conditions. Numerical analyses are made for the turbine rotors with a same shape, but different sizes obtained using the diameter evaluation equation suggested in this paper. It is shown that the performance of turbine is clearly dependent upon the rotor size and inflow velocity, i.e. Reynolds number dependency of different-scaled turbines showing better efficiency with increasing Reynolds number. The sudden decrease of efficiency is also noticed around the transition region of Reynolds number. The hydrodynamic capacity evaluation method needed at initial stage of turbine design is suggested and exercised with some test cases. It is recommended that the method is expected to be useful for turbines with demanding powers between 10 kW and 300 kW.
Keywords
Tidal stream energy; Vertical axis turbine; Reynolds number; Scale effect; Turbine diameter; Numerical analysis;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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