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1MW class tidal-current turbine blade shape design and power-performance prediction in various TSR conditions

Vol.42 No.4, 2018.5, 298-303 (6 pages)
DOI :10.5916/jkosme.2018.42.4.298
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Abstract
본 논문에서는 일반적으로 블레이드 공력설계와 출력 성능해석에 활용되고 있는 날개요소운동량이론을 이용하여 1MW급 수평축 조류터빈 블레이드 기본형상을 설계하였다. 기본형상은 NREL S814 에어포일을 적용한 3엽 블레이드이다. 조류터빈 블레이드는 해양환경 특성상 해류와 수압 등에서 운전되므로 형상 설계 시 신중히 고려되어야 한다. 본 블레이드 형상의 유동특성 및 출력성능을 비교 검토하기 위해 주속비 별로 CFD을 수행하였으며 블레이드의 각각의 국부위치에서 압력계수와 출력성능을 검토하였다. CFD에 의한 기계적 최대출력계수는 설계 주속비 5의 조건에서 48%로 나타났다.

We designed the basic shape of a 1-MW horizontal-axis tidal-current turbine blade utilized for blade element momentum theory, which has been used generally for aerodynamic design and power performance analysis. The basic shape is a three-blade applied to NREL S814 airfoil. Tidal current turbine blades are operated by ocean current and water pressure because of the nature the marine environment and the environment should be discretely considered when designing the shape. To compare the flow characteristics and power performance of the present blade shape, computational fluid dynamics CFD analysis was performed according to the blade tip speed ratio (TSR), and the pressure coefficient and power performance were examined at each local position of the blade. The mechanical maximum power coefficient due to CFD was 48% under the condition of TSR 5.

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요약
Abstract
1. 서론
2. 수평축 조류발전 터빈 블레이드 설계
3. CFD에 의한 출력성능 해석
4. 해석결과
5. 결론
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