부유식 풍력 발전기의 자유도 운동에 따른 공력 및 구조 해석 (Aerodynamics and Structural Dynamics of Floating Offshore Wind Turbine under Different Degrees of Freedom)

서지정보

· 발행기관 : 한국신·재생에너지학회
· 수록지 정보 : 신재생에너지 / 15권 / 4호 / 11 ~ 20페이지
· 저자명 : 한원석, 전민우, 이수갑

초록

A floating offshore wind turbine (FOWT) has six degrees of freedom (DOF) motion caused from stochastic wind and wave loads. As each type of FOWT support platform has different characteristics of the 6-DOFs motion, it is important to understand the effect of 6-DOFs motion on the aerodynamic performance and structural loads of FOWTs. In this study, two different types of support platform, Spar-type OC3-Hywind and tension-leg platform (TLP)-type MIT/TLP, were investigated for a NREL 5-MW wind turbine. The aerodynamic performance and structural loads were calculated from NREL’s FAST code where aerodynamics module is replaced with an unsteady vortex lattice method (UVLM). Aerodynamic power performance and fatigue loads of the two different support platforms were compared. The aerodynamic characteristics, power performance and root flapwise bending moment, showed comparable results for both Spar and TLP. In the structural dynamics aspect, however, TLP showed 22% less damage equivalent load (DEL) than Spar, according to the axial force. Furthermore, the TLP’s DEL of fore-aft bending moment showed 16% less than Spar. Inaddition, the damage rate showed similar results to the DEL.

영어초록

A floating offshore wind turbine (FOWT) has six degrees of freedom (DOF) motion caused from stochastic wind and wave loads. As each type of FOWT support platform has different characteristics of the 6-DOFs motion, it is important to understand the effect of 6-DOFs motion on the aerodynamic performance and structural loads of FOWTs. In this study, two different types of support platform, Spar-type OC3-Hywind and tension-leg platform (TLP)-type MIT/TLP, were investigated for a NREL 5-MW wind turbine. The aerodynamic performance and structural loads were calculated from NREL’s FAST code where aerodynamics module is replaced with an unsteady vortex lattice method (UVLM). Aerodynamic power performance and fatigue loads of the two different support platforms were compared. The aerodynamic characteristics, power performance and root flapwise bending moment, showed comparable results for both Spar and TLP. In the structural dynamics aspect, however, TLP showed 22% less damage equivalent load (DEL) than Spar, according to the axial force. Furthermore, the TLP’s DEL of fore-aft bending moment showed 16% less than Spar. Inaddition, the damage rate showed similar results to the DEL.

참고자료

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