Articles | Volume 5, issue 4
https://doi.org/10.5194/wes-5-1713-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wes-5-1713-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
10 Dec 2020
Research article |
| 10 Dec 2020
| 10 Dec 2020
Characterization of the unsteady aerodynamic response of a floating offshore wind turbine to surge motion
Simone Mancini
CORRESPONDING AUTHOR
Politecnico di Milano, Department of Mechanical Engineering, Milano, Italy
Koen Boorsma
TNO Energy Transition, Petten, the Netherlands
Marco Caboni
TNO Energy Transition, Petten, the Netherlands
Marion Cormier
University of Stuttgart, Institute of Aerodynamics and Gas Dynamics, Stuttgart, Germany
Thorsten Lutz
University of Stuttgart, Institute of Aerodynamics and Gas Dynamics, Stuttgart, Germany
Paolo Schito
Politecnico di Milano, Department of Mechanical Engineering, Milano, Italy
Alberto Zasso
Politecnico di Milano, Department of Mechanical Engineering, Milano, Italy
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Giorgia Guma, Philipp Bucher, Patrick Letzgus, Thorsten Lutz, and Roland Wüchner
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Florian Wenz, Judith Langner, Thorsten Lutz, and Ewald Krämer
Wind Energ. Sci., 7, 1321–1340, https://doi.org/10.5194/wes-7-1321-2022, https://doi.org/10.5194/wes-7-1321-2022, 2022
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To get a better understanding of the influence of the terrain flow on the unsteady pressure distributions on the wind turbine surface, a fully resolved turbine was simulated in the complex terrain of Perdigão, Portugal. It was found that the pressure fluctuations at the tower caused by vortex shedding are significantly hampered by the terrain flow, while the pressure fluctuations caused by the blade–tower interaction are hardly changed.
Benjamin Sanderse, Vinit V. Dighe, Koen Boorsma, and Gerard Schepers
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An accurate prediction of loads and power of an offshore wind turbine is needed for an optimal design. However, such predictions are typically performed with engineering models that contain many inaccuracies and uncertainties. In this paper we have proposed a systematic approach to quantify and calibrate these uncertainties based on two experimental datasets. The calibrated models are much closer to the experimental data and are equipped with an estimate of the uncertainty in the predictions.
Alessandro Fontanella, Ilmas Bayati, Robert Mikkelsen, Marco Belloli, and Alberto Zasso
Wind Energ. Sci., 6, 1169–1190, https://doi.org/10.5194/wes-6-1169-2021, https://doi.org/10.5194/wes-6-1169-2021, 2021
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The scale model wind tunnel experiment presented in this paper investigated the aerodynamic response of a floating turbine subjected to imposed surge motion. The problem is studied under different aspects, from airfoil aerodynamics to wake, in a coherent manner. Results show quasi-static behavior for reduced frequencies lower than 0.5 and possible unsteadiness for higher surge motion frequencies. Data are made available to the public for future verification and calibration of numerical models.
Giorgia Guma, Galih Bangga, Thorsten Lutz, and Ewald Krämer
Wind Energ. Sci., 6, 93–110, https://doi.org/10.5194/wes-6-93-2021, https://doi.org/10.5194/wes-6-93-2021, 2021
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With the increase in installed wind capacity, the rotor diameter of wind turbines is becoming larger and larger, and therefore it is necessary to take aeroelasticity into consideration. At the same time, wind turbines are in reality subjected to atmospheric inflow leading to high wind instabilities and fluctuations. Within this work, a high-fidelity chain is used to analyze the effects of both by the use of models of the same turbine with increasing complexity and technical details.
Cited articles
Bayati, I., Belloli, M., Bernini, L., and Zasso, A.: Wind tunnel validation of AeroDyn within LIFES50+ project: imposed Surge and Pitch tests, J. Phys.:
Conf. Ser., 753, 092001, https://doi.org/10.1088/1742-6596/753/9/092001, 2016. a
Bayati, I., Belloli, M., Bernini, L., Giberti, H., and Zasso, A.: Scale model
technology for floating offshore wind turbines, IET Renew. Power Gener., 11,
1120–1126, https://doi.org/10.1049/iet-rpg.2016.0956, 2017a. a, b, c
Bayati, I., Belloli, M., Bernini, L., and Zasso, A.: Wind Tunnel Wake
Measurements of Floating Offshore Wind Turbines, Energy Procedia, 137, 214–222, https://doi.org/10.1016/j.egypro.2017.10.375, 2017b. a, b
Bayati, I., Belloli, M., Bernini, L., and Zasso, A.: Aerodynamic design
methodology for wind tunnel tests of wind turbine rotors, Renew. Energy, 167, 1–12, https://doi.org/10.1016/j.jweia.2017.05.004, 2017c. a, b
Bayati, I., Belloli, M., Bernini, L., Boldrin, D. M., Boorsma, K., Caboni, M., Cormier, M., Mikkelsen, R., Lutz, T., and Zasso, A.: UNAFLOW project:
UNsteady Aerodynamics of FLOating Wind turbines, J. Phys.: Conf. Ser., 1037,
072037, https://doi.org/10.1088/1742-6596/1037/7/072037, 2018a. a
Bayati, I., Bernini, L., Zanotti, A., Belloli, M., and Zasso, A.: Experimental investigation of the unsteady aerodynamics of FOWT through PIV and hot-wire wake measurements, J. Phys.: Conf. Ser., 1037, 052024, https://doi.org/10.1088/1742-6596/1037/5/052024, 2018b. a
Boorsma, K., Grasso, F., and Holierhoek, J. G.: Enhanced approach for
simulation of rotor aerodynamic loads, Report EC N-M–12-003, ECN,
in: EWEA Offshore 2011, 29 November–1 December 2011, Amsterdam, 2011. a
Boorsma, K., Hartvelt, M., and Orsi, L. M.: Application of the lifting line
vortex wake method to dynamic load case simulations, J. Phys.: Conf. Ser.,
753, 022030, https://doi.org/10.1088/1742-6596/753/2/022030, 2016. a
Boorsma, K., Wenz, F., Lindenburg, K., Aman, M., and Kloosterman, M.: Validation and accommodation of vortex wake codes for wind turbine design load calculations, Wind Energ. Sci., 5, 699–719, https://doi.org/10.5194/wes-5-699-2020, 2020. a
Cormier, M., Caboni, M., Lutz, T., Boorsma, K., and Krämer, E.: Numerical
analysis of unsteady aerodynamics of floating offshore wind turbines, J.
Phys.: Conf. Ser., 1037, 072048, https://doi.org/10.1088/1742-6596/1037/7/072048, 2018. a, b
de Vaal, J. B., Hansen, M. O. L., and Moan, T.: Effect of wind turbine surge
motion on rotor thrust and induced velocity, Wind Energ., 17, 105–121,
https://doi.org/10.1002/we.1562, 2014. a, b, c, d
Farrugia, R., Sant, T., and Micallef, D.: Investigating the aerodynamic
performance of a model offshore floating wind turbine, Renew. Energy, 70,
24–30, https://doi.org/10.1016/j.renene.2013.12.043, 2014. a
Farrugia, R., Sant, T., and Micallef, D.: A study on the aerodynamics of a
floating wind turbine rotor, Renew. Energy, 86, 770–784,
https://doi.org/10.1016/j.renene.2015.08.063, 2016. a, b, c
Goupee, J. A., Kimball, R. W., and Dagher, H. J.: Experimental observations of active blade pitch and generator control influence on floating wind turbine response, Renew. Energy, 104, 9–19, https://doi.org/10.1016/j.renene.2016.11.062, 2017. a, b
Jameson, A., Schmidt, W., and Turkel, E.: Numerical solution of the Euler
equations by finite volume methods using Runge Kutta time stepping schemes,
in: 14th fluid and plasma dynamics conference, Palo Alto, CA, USA, p. 1259, 1981. a
Khosravi, M., Sarkar, P., and Hu, H.: An Experimental Investigation on the
Performance and the Wake Characteristics of a Wind Turbine Subjected to Surge
Motion, in: 33rd Wind Energy Symposium 2015/AIAA SciTech Forum 2015, AIAA 2015-1207, Kissimmee, Florida, https://doi.org/10.2514/6.2015-1207, 2015. a
Kowarsch, U., Keßler, M., and Krämer, E.: High order CFD-simulation of the rotor-fuselage interaction, in: 44th European Rotorcraft Forum, Moscow, Russia, 2013. a
Kroll, N. and Faßbender, J. K.: MEGAFLOW – Numerical Flow Simulation for
Aircraft Design, Springer Verlag, Braunschweig, Germany, 2005. a
Lindenburg, C. and Schepers, J. G.: Phatas-IV Aeroelastic Modelling, Release `DEC-1999' and `NOV-2000', Report ECN-CX–00-027, ECN, Petten, the Netherlands, 2000. a
Madsen, F. J., Nielsen, T. R. L., Kima, T., Bredmose, H., Pegalajar-Jurado, A., Mikkelsen, R. F., Lomholt, A. K., Borg, M., Mirzaei, M., and Shin, P.:
Experimental analysis of the scaled DTU10MW TLP floating wind turbine with
different control strategies, Renew. Energy, 155, 330–346,
https://doi.org/10.1016/j.renene.2020.03.145, 2020. a, b, c
Mantha, D., Schlipf, M., Cordle, A., Pereira, R., and Jonkman, J.: Challenges
in Simulation of Aerodynamics, Hydrodynamics, and Mooring-Line Dynamics of
Floating Offshore Wind Turbines, in: 21st Offshore and Polar Engineering
Conference, Maui, Hawaii, 2011. a
Melani, P. F., Schito, P., and Persico, G. B. A.: Experimental Assessment of an Actuator-Line Simulation Tool for VAWTs, in: Wind Energy Exploitation in
Urban Environment. TUrbWind 2018, edited by: Battisti, L., Springer International Publishing, Milan, Italy, 177–200, https://doi.org/10.1007/978-3-030-13531-7_11, 2019. a
Menter, F. R.: Two-equation eddy-viscosity turbulence models for engineering
applications, AIAA J., 32, 1598–1605, 1994. a
Micallef, D. and Sant, T.: Loading effects on floating offshore horizontal axis wind turbines in surge motion, Renew. Energy, 83, 737–748,
https://doi.org/10.1016/j.renene.2015.05.016, 2015. a, b, c, d
Nielsen, F. G., Hanson, T. D., and Skaare, G.: Integrated dynamic analysis of
floating offshore wind turbines, in: Proceedings of the 25th International
Conference on Offshore Mechanics and Arctic Engineering, Hamburg, Germany, 671–679, 2006. a
Øye, S.: A simple vortex model of a turbine rotor, in: Proceedings of the
third IEA symposium on the aerodynamics of wind turbines, Harwell, UK, 1–15, 1990. a
Pedersen, M. D.: Stabilization of Floating Wind Turbines, PhD thesis, NTNU,
Trondheim, Denmark, 2017. a
Ren, N., Li, Y., and Ou, J.: Coupled wind-wave time domain analysis of floating offshore wind turbine based on Computational Fluid Dynamics method, J. Renew. Sustain. Ener., 6, 023106, https://doi.org/10.1063/1.4870988, 2014. a
Sant, T., Bonnici, D., Farrugia, R., and Micallef, D.: Measurements and
modelling of the power performance of a model floating wind turbine under
controlled conditions, Wind Energ., 18, 811–834, https://doi.org/10.1002/we.1730, 2015. a
Sarlak, H., Meneveau, C., and Sørensen, J. N.: Role of subgrid-scale modeling
in large eddy simulation of wind turbine wake interactions, Renew. Energy,
77, 386–399, https://doi.org/10.1016/j.renene.2014.12.036, 2015.
a
Sayed, M., Lutz, T., and Krämer, E.: Aerodynamic investigation of flow over a multi-megawatt slender bladed horizontal-axis wind turbine, in: Renewable Energies Offshore, Lisbon, Portugal, 773–780, 2015. a
Schito, P.: Large Eddy Simulation of wind turbines: interaction with turbulent flow, PhD thesis, Politecnico di Milano, Milan, Italy, 2011. a
Schito, P. and Zasso, A.: Actuator forces in CFD: RANS and LES modeling in
OpenFOAM, J. Phys.: Conf. Ser., 524, 012160, https://doi.org/10.1088/1742-6596/524/1/012160, 2014. a, b
Schito, P., Bayati, I., Belloli, M., Bernini, L., Dossena, V., and Zasso, A.:
Numerical Wind Tunnel Tests of an Open Data IPC-VAWT, in: Wind Energy
Exploitation in Urban Environment. TUrbWind 2017, edited by: Battisti, L. and
Ricci, M.,Springer, Cham, Milan, Italy, 113–122, https://doi.org/10.1007/978-3-319-74944-0_8, 2018. a
Sebastian, T. and Lackner, M. A.: Analysis of the Induction and Wake Evolution of an Offshore Floating Wind Turbine, Energies, 5, 968–1000,
https://doi.org/10.3390/en5040968, 2012. a
Sebastian, T. and Lackner, M. A.: Characterization of the unsteady aerodynamics of offshore floating wind turbines, Wind Energ., 16, 339–352,
https://doi.org/10.1002/we.545, 2013. a
Snel, H.: Heuristic modelling of dynamic stall characteristics, in: Conference proceedings European Wind Energy Conference, Dublin, Ireland, 429–433, 1997. a
Snel, H. and Schepers, J. G.: JOULE1: Joint investigation of Dynamic Inflow
Effects and Implementation of an Engineering Model, Report ECN-C–94-107, ECN, Petten, the Netherlands, 1994. a
Snel, H., Houwink, R., van Bussel, G. J. W., and Bruining, A.: Sectional
prediction of 3D effects for stalled flow on rotating blades and comparison
with measurements, in: Proc. European Community Wind Energy Conference,
Travemünde, Germany, 1993. a
Tran, T. T. and Kim, D. H.: A CFD study into the influence of unsteady
aerodynamic interference on wind turbine surge motion, Renew. Energy, 90,
204–228, https://doi.org/10.1016/j.renene.2015.12.013, 2016. a, b
Short summary
This work characterizes the unsteady aerodynamic response of a scaled version of a 10 MW floating wind turbine subjected to an imposed platform motion. The focus has been put on the simple yet significant motion along the wind's direction (surge). For this purpose, different state-of-the-art aerodynamic codes have been used, validating the outcomes with detailed wind tunnel experiments. This paper sheds light on floating-turbine unsteady aerodynamics for a more conscious controller design.
This work characterizes the unsteady aerodynamic response of a scaled version of a 10 MW...
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