Ocean Systems Engineering

  • 제13권2호
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  • Pages.173-193
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  • 2023
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  • 2093-6702(pISSN)
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  • 2093-677X(eISSN)
테크노프레스 (Techno-Press)
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Systematic comparisons among OpenFAST, Charm3D-FAST simulations and DeepCWind model test for 5 MW OC4 semisubmersible offshore wind turbine

  • Jieyan Chen (Department of Ocean Engineering, Texas A&M University) ;
  • Chungkuk Jin (Department of Ocean Engineering and Marine Science, Florida Institute of Technology) ;
  • Moo-Hyun Kim (Department of Ocean Engineering, Texas A&M University)
  • 투고 : 2023.04.02
  • 심사 : 2023.06.02
  • 발행 : 2023.06.25
⟨ 이전 논문 다음 논문 ⟩

초록

Reliable prediction of the motion of FOWT (floating offshore wind turbine) and associated mooring line tension is important in both design and operation/monitoring processes. In the present study, a 5MW OC4 semisubmersible wind turbine is numerically modeled, simulated, and analyzed by the open-source numerical tool, OpenFAST and in-house numerical tool, Charm3D-FAST. Another commercial-level program FASTv8-OrcaFlex is also introduced for comparison for selected cases. The three simulation programs solve the same turbine-floater-mooring coupled dynamics in time domain while there exist minor differences in the details of the program. Both the motions and mooring-line tensions are calculated and compared with the DeepCWind 1/50 scale model-testing results. The system identification between the numerical and physical models is checked through the static-offset test and free-decay test. Then the system motions and mooring tensions are systematically compared among the simulated results and measured values. Reasonably good agreements between the simulation and measurement are demonstrated for (i) white-noise random waves, (ii) typical random waves, and (iii) typical random waves with steady wind. Based on the comparison between numerical results and experimental data, the relative importance and role of the differences in the numerical methodologies of those three programs can be observed and interpreted. These comparative-study results may provide a certain confidence level and some insight of potential variability in motion and tension predictions for future FOWT designs and applications.

키워드

참고문헌

  1. Bae, Y.H. and Kim, M.H. (2011), "Rotor-floater-mooring coupled dynamic analysis of mono-column-TLP-type FOWT (Floating Offshore Wind Turbine)", Ocean Syst. Eng., 1(1), 93-109. https://doi.org/10.12989/ose.2011.1.1.095.
  2. Bae, Y.H. and Kim, M.H. (2014), "Coupled dynamic analysis of multiple wind turbines on a large single floater", Ocean Eng., 92, 175-187. https://doi.org/10.1016/j.oceaneng.2014.10.001.
  3. Bae, Y.H. and Kim, M.H. (2014), "Influence of control strategy to FOWT global performance by aero-elastic-control-floater-mooring coupled dynamic analysis", Ocean Wind Energy, 1(1), 50-58.
  4. Chen, J. and Kim, M.H. (2022), "Review of recent offshore wind turbine research and optimization methodologies in their design", Mar. Sci. Eng., 10(1), 28. https://doi.org/10.3390/jmse10010028.
  5. Coulling, A.J., Goupee, A.J., Robertson, A.N., Jonkman, J.M. and Dagher, H.J. (2013), "Validation of a FAST semi-submersible floating wind turbine numerical model with DeepCwind test data", Renew. Sust. Energ., 5, 023116. https://doi.org/10.1063/1.4796197.
  6. Coulling, A.J., Goupee, A.J., Robertson, A.N. and Jonkman, J.M. (2013), "Importance of second-order difference-frequency wave-diffraction forces in the validation of a fast semi-submersible floating wind turbine model", Proceedings of the 32th (2013) International Conference on Ocean, Offshore and Arctic Engineering Nantes, France.
  7. Dominique, R., Christian, C., Alexia, A. and Alla, W. (2010), "WindFloat: A floating foundation for offshore wind turbines", Renew. Sust. Energ., 2, 033104. https://doi.org/10.1063/1.3435339.
  8. Jang, H.K., Park, S., Kim, M.H., Kim, K.H. and Hong, K. (2019), "Effects of heave plates on the global performance of a multi-unit floating offshore wind turbine", Renew. Energ., 134, 526-537. https://doi.org/10.1016/j.renene.2018.11.033.
  9. Jonkman, J.M. and Buhl Jr., M.L. (2004), "FAST user's guide", National Renewable Energy Laboratory, Rept. NREL/EL-500-29798, Golden, Colorado.
  10. Jonkman, J.M., Butterfield, S., Musial, W. and Scott, G. (2007), "Definition of a 5-MW reference wind turbine for offshore system development", NREL Technical Report No. TP-500-38060.
  11. Kim, H.C. and Kim, M.H. (2015), "Global performances of a semi-submersible 5MW wind-turbine including second-order wave-diffraction effects", Ocean Syst. Eng., 5(3), 139-160. https://doi.org/10.12989/ose.2015.5.3.139.
  12. Kim, H.C. and Kim, M.H. (2016), "Comparison of simulated platform dynamics in steady / dynamic winds and irregular waves for OC4 semi-submersible 5MW wind-turbine against DeepCwind model-test results", Ocean Syst. Eng., 6(1), 1-21. https://doi.org/10.12989/ose.2016.6.1.001.
  13. Kim, H.C., Kim, M.H. and Choe, D.E. (2019), "Structural health monitoring of towers and blades for floating offshore wind turbines using operational modal analysis and modal properties with numerical-sensor signals", Ocean Eng., 188, 106226. https://doi.org/10.1016/j.oceaneng.2019.106226.
  14. Kim, M.H., Ran, Z. and Zheng, W. (2001), "Hull/mooring coupled dynamic analysis of a truss spar in time domain", Int. J. Offshore Polar Eng., 11(1), 42-54.
  15. Kim, M.H. and Yue, D.K.P. (1989), "The complete second-order diffraction solution for an axisymmetric body. Part 1. Monochromatic incident waves", J. Fluid Mech., 200, 235-264. https://doi.org/10.1017/S0022112089000649.
  16. Kim, M.H. and Yue, D.K.P. (1990), "The complete second-order diffraction solution for an axisymmetric body. Part 2. Bichromatic incident waves and body motions", J. Fluid Mech., 211, 557-593. https://doi.org/10.1017/S0022112090001690.
  17. Koo, B.J., Goupee, A.J., Kimball, R.W. and Lambrakos, K.F. (2014a), "Model tests for a floating wind turbine on three different floaters", J. Offshore Mech. Arct., 136(2), 021904. https://doi.org/10.1115/1.4024711.
  18. Koo, B.J., Goupee, A.J., Lambrakos, K. and Lim, H.J. (2014b). "Model test data correlations with fully coupled hull/mooring analysis for a floating wind turbine on a semi-submersible platform", Proceedings of the 33th (2014) International Conference on Ocean, Offshore and Arctic Engineering, San Francisco, USA.
  19. Li, C.X. and Zhang, J. (2016), "Nonlinear coupled dynamics analysis of a truss spar platform", China Ocean Eng., 30(6), 835-850. https://doi.org/10.1007/s13344-016-0054-2.
  20. Masciola, M., Robertson, A.N., Jonkman, J.M., Alexander Coulling, A.J. and Goupee, A.J. (2013), "Assessment of the importance of mooring dynamics on the global response of the DeepCwind floating semisubmersible offshore wind turbine", Proceedings of the 23th International Offshore and Polar Engineering Conference, Anchorage, USA.
  21. Tahar, A. and Kim, M.H. (2003), "Hull/mooring/riser coupled dynamic analysis and sensitivity study of a tanker-based FPSO", Appl. Ocean Res., 25(6), 367-382. https://doi.org/10.1016/j.apor.2003.02.001.
  22. Yang, C.K. and Kim, M.H. (2010), "Transient effects of tendon disconnection of a TLP by hull-tendon-riser coupled dynamic analysis", Ocean Eng., 37(8-9), 667-677. https://doi.org/10.1016/j.oceaneng.2010.01.005.
  23. Zhao, W. and Wan, D. (2015), "Numerical study of interactions between phase ii of oc4 wind turbine and its semi-submersible floating support system", J. Ocean Wind Energy, 2(1), 45-53.