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Hydrodynamically Optimal Blade Design for 500kW Class Horizontal Axis Tidal Current Turbine  

Ryu, Ki-Wahn (Dept. of Aerospace Eng., Chonbuk National University)
Publication Information
Journal of the Korean Solar Energy Society / v.29, no.5, 2009 , pp. 73-80 More about this Journal
Abstract
A tidal current turbine is designed and analyzed numerically by using blade element momentum theory. The rated power has a limitation because the diameter of the tidal current turbine cannot exceed the depth of sea water. This study investigates a horizontal axis tidal-current turbine with a rated power of 500 kW. NACA-6 series laminar foil shape is used for basic airfoil along the blade span. The distributions of chord length and twist angle along the blade span are obtained from the hydrodynamic optimization procedure. Prandtl's tip loss correction and angle of attack correction considering the three-dimensional effect are applied for this study. The power coefficient curve shows maximum peak at the rated tip speed ratio of 6.0, and the maximum torque coefficient is developed at the tip speed ratio of 4. The drag coefficient reaches about 0.85 at the design tip speed ratio.
Keywords
Horizontal Axis Turbine; Tidal Current; Blade Element Momentum Theory; Tip Speed Ratio; Rated Power;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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