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http://dx.doi.org/10.9765/KSCOE.2019.31.5.314

Analysis of Coefficiency According to Blade rpm Change in Tidal Current Power Generation System  

Lee, Uk Jae (Department of Civil and Environmental Engineering, Wonkwang University)
Han, Seok Jong (Department of Mechanical Engineering, Wonkwang University)
Bak, Da In (Department of Mechanical Engineering, Wonkwang University)
Jeong, Shin Taek (Department of Civil and Environmental Engineering, Wonkwang University)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.31, no.5, 2019 , pp. 314-319 More about this Journal
Abstract
The numerical simulation method was used to analyze the flow velocity change and mechanical coefficient characteristics of the blade in the shroud system that changes with the initial flow velocity and the blade rpm. In the analysis condition, the initial flow velocity was varied from 0.35 m/s to 1.0 m/s, and the blade rpm varied from 50 rpm to 300 rpm. Through this, the mechanical coefficient was estimated. The flow velocity changes tended to increase more than 1.8 times at the middle point compared to the inlet. When the flow velocity ratio was 0.75 m/s compared to the initial flow velocity of 0.5 m/s, the flow velocity ratio decreased. The mechanical coefficient using the torque of the blade also showed the highest coefficient at 0.5 m/s, and the trends were similar. On the other hand, the maximum coefficient was estimated to be about 20.88% in TSR 4.77 when the initial flow velocity was 0.5 m/s. The mechanical coefficient analysis of blades in this study is expected to provide the basic data for hydraulic model experimental.
Keywords
tidal current power generation(TCP); shroud system; numerical simulation; flow velocity ratio; tip speed ratio(TSR); mechanical coefficient;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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