부유식 풍력 발전기의 자유도 운동에 따른 공력 및 구조 해석
Aerodynamics and Structural Dynamics of Floating Offshore Wind Turbine under Different Degrees of Freedom
2
조회
0
다운로드
3
인용
0
참고문헌
키워드
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.
Abstract
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.
참고문헌 (19)
- Musial, W., "Feasibility of floating platform systems for wind turbines", 42nd AIAA Aerospace Sciences Meeting and Exhibit (2004)
- FAST User’s Guide, "Jonkman, J.M.", National Renewable Energy Laboratory, ~, pp.Technical Report NREL (2005), EL-500-38230
- Definition of a 5-MW reference wind turbine for offshore system development, "Jonkman, J.", National Renewable Energy Laboratory, ~, pp.Technical Report NREL (2005), TP-500-38060
- Loads analysis of several offshore floating wind turbine concepts, "Robertson, A.N.", International Society of Offshore and Polar Engineers, ~ (2011)
- "TC88-MT IEC, IEC 61400-3: Wind turbines part 1: Design requirements", International Electro-technical Commission, ~ (2005)
- Katz, J., "Low-speed aerodynamics" (2001), Cambridge University Press
- Kim H., "Aerodynamic noise analysis of large horizontal axis wind turbines considering fluid-structure interaction", Renewable Energy, 42, pp.46~53 (2012)
- Du, Z., "A 3-D stall-delay model for horizontal axis wind turbine performance prediction", AIAA, 1998, 9~19
- Moriarty, P J, "AeroDyn Theory Manual", doi:10.2172, 2005
- Jeon, M., "Wake influence on dynamic load characteristics of offshore floating wind turbines", AIAA Journal, pp.3535~3545 (2016)
- Kvittem, M.I., "Time domain analysis procedures for fatigue assessment of a semi-submersible wind turbine", Mar. Struct, 40, pp.38~59 (2015)
- Haoran Li, "Short-term fatigue analysis for tower base of a spar-type wind turbine under stochastic wind-wave loads", International Journal of Naval Architecture and Ocean Engineering, 10(1), pp.9~20 (2018), 대한조선학회
- MExtemes Manual Version 1.00, "Hayman, G.J.", National Renewable Energy Laboratory, ~ (2015)
- DNV GL AS, "RP-C203: Fatigue design of offshore steel structures", Standard: DNVGL-RP-0005, 22~23 (2016)
- Slot, R.M.M., "Directional fatigue accumulation in wind turbine steel towers", Journal of Physics: Conference Series, 1102, pp.012017~ (2018)[DOI]
- MLife Theory Manual for Version 1.00, "Hayman, G.", NREL, ~ (2012)
- Sant, T., "Comparing three aerodynamic models for predicting the thrust and power characteristics of a yawed floating wind turbine rotor", J. Sol. Energy Eng, 138(3), pp.031004~ (2016)
- International Electrotechnical Commission, "IEC 61400-1: Wind turbines-part 1: design requirements, Third Edition", ~ (2005)
- Bergami, L., , Wind Energy, 16, pp.681~693 (2013)