A Study of Morphing Trailing Edge Flaps Applied on Offshore Wind Turbine


  • Vikki Jhare M.Tech Scholar, Oriental Institute of Science And Technology, Bhopal, M.P, India
  • Harsh Patidar Assistant Professor, Oriental Institute of Science And Technology, Bhopal, M.P, India




CFD, Trailing edge flaps, Load reduction


Wind turbines are operating in a highly unsteady flow environment which causes dynamic load fluctuations relevant to the overall wind turbine design. Fatigue loads play an important role in the aeroelastic rotor development and contribute significantly to the turbine costs as blade loads cascade down through the entire turbine system. A reduction of fatigue loads can thus have a positive influence on the rotor weight, costs and system reliability or allow a further increase of the rotor diameter. Active trailing edge flaps (ATEFs) represent a very promising approach for the reduction of fatigue and also ultimate loads. By adapting the deflection angle it is possible to adjust to the current inflow situation and reduce load fluctuations. The present study investigates the influence of three-dimensional aerodynamic effects on a wind turbine rotor blade with trailing edge flap by means of CFD. Different flap extensions in chord and radial direction can be analyzed on rotor blade. The study shows that to 2D airfoil simulations at mid flap position shows that vortices which develop at the flap edges have a significant influence on the aerodynamic characteristics. They reduce the lift increase or decrease caused by the flap deployment and thus the flap effectiveness. As compared to 2D, 3D effect shows reduction in lift variation.


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Barlas T., van der Veen G., van Kuik G. Model predictive control for wind turbines with distributed active flaps: incorporating inflow signals and actuator constraints. Wind Energy. vol 15. pp 757-771. 2012.

Castaignet D., Barlas T., Buhl T., Poulsen N., Wedel-Heinen J., Olsen N., Bak C., Kim T. Full-scale test of trailing edge flaps on a Vestas V27 wind turbine: active load reduction and system identification. Wind Energy. vol 17. pp 549-564. 2014.

Riziotis V., Voutsinas S. Aero-elastic modelling of the active flap concept for load control. Proceedings of the EWEC. Brussels. Belgium. 2008.

Heinz J., Sørensen N., Zahle F. Investigations of the load reduction potential of two trailing edge flap controls using CFD. Wind Energy. Vol 14. pp 449-462. 2011.

Wolff T., Ernst B., Seume J. Aerodynamic behaviour with morphing trailing edge for wind turbine applications. Journal of Physics Conference Series - The Science of Making Torque from Wind. doi:10.1088/1742-6596/524/1/012018. 2014.

Jost E., Fischer A., Lutz T., Kramer ¨ E. CFD studies of a 10 MW wind turbine equipped with active trailing edge flaps. Proceedings of the 10th PhD Seminar on Wind Energy in Europe. Orleans. France. 2014.

Leble V., Wang Y., Barakos G. CFD analysis of 10-MW wind turbines. Proceedings of the DEWEK. Bremen. Germany. 2015.

Schulz C., Fischer A., Weihing P., Lutz T. Kramer ¨ E. Evaluation and Control of Wind Turbines under Different Operation Conditions by means of CFD. High Performance Computing in Science and Engineering ’15, Springer International Publishing, 2015.

Kroll N., Fassbender J. MEGAFLOW-Numerical Flow Simulation for Aircraft Design. Springer Verlag. Berlin/Heidelberg/New York. 2002.

Johansen J., Sørensen N. Aerofoil Characteristics from 3D CFD Rotor Computations. Wind Energy. vol 7. pp 283-294. 2004.

Klein L., Lutz T., Kramer ¨ E. CFD analysis of 2-bladed wind turbine. Proceedings of the 10th PhD Seminar on Wind Energy in Europe. Orleans. France. 2014.

Sørensen N., Hansen M., Garcia N., Florentie L., Boorsma K., Gomez-Iradi S., Prospathopoulus J., Barakos G., Wang Y., Jost E., Lutz T. AVATAR Deliverable 2.3 - Power Curve Predictions. http://www.eera-avatar.eu. 2015.

Ferreira C., Gonzalez A., Baldacchino D. et al. AVATAR Deliverable 3.2 - Development of aerodynamic codes for modelling of flow devices on aerofoils and rotors. http://www.eera-avatar.eu. 2015.

Bak C., Zahle F., Bitsche R., Kim T., Yde A., Henriksen L., Andersen P., Natarajan A., Hansen M. Design and performance of 10 MW turbine. dtu-10mw-rwt.vindenergi.dtu.dk, 2013.

Jost E., Lutz T., Kramer ¨ E. Steady and unsteady CFD power curve simulations of generic 10 MW turbines. Proceedings of the 11th PhD Seminar on Wind Energy in Europe. Stuttgart. Germany. 2015.

Schuff M., Kranzinger P., Kessler M., Kramer ¨ E. Advanced CFD-CSD coupling: Generalized, high performant, radial basis function based volume mesh deformation algorithm for structured, unstructured and overlapping meshes. Proceedings of the 40th European Rotorcraft Forum. Southhampton. Great Britain. 2014.

Manolesos M., Prospathopoulus J., et al. AVATAR Deliverable 3.1 - CFD and experimental database of flow devices, comparison. http://www.eera-avatar.eu/. 2015.




How to Cite

Jhare, V., & Patidar, H. (2017). A Study of Morphing Trailing Edge Flaps Applied on Offshore Wind Turbine. SMART MOVES JOURNAL IJOSCIENCE, 3(7), 25–28. https://doi.org/10.24113/ijoscience.v3i7.30