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조류발전 축소모형 시험을 위한 수평형 회류수조의 유동 특성 분석
정세진,이희범,문성민,김흥찬,서창현,장인성,김지훈 한국산학기술학회 2024 한국산학기술학회논문지 Vol.25 No.3
The tidal current turbine is a power generation system that utilizes tidal currents and is one of the renewable energy sources proposed to solve the problems of environmental pollution and global warming caused by CO2 emissions. Nevertheless, the commercialization of tidal current turbine generators requires scale model tests to predict the performance. This study measured the flow characteristics of a horizontal circulating water channel using particle image velocimetry (PIV) for the scale model test of a tidal current turbine. In particular, the flow velocity distribution and turbulence intensity were measured at set flow rates of 0.5, 0.75, and 1 m/s. Due to the horizontal shape, the maximum flow speed was at the outer part of the observation, and the minimum flow speed was at the inner part of the cross-section. The turbulence intensity increased as the flow velocity increased and from the inner to the outer edge. The flow visualization results also revealed uniform flow velocity zones near the central and outer regions. These results are expected to be used in designing experiments to assess underwater structures, such as tidal generators and unmanned underwater robots with underwater dynamic performance.