CFD Study of Trailing Edge Flaps for Load Control on Wind Turbines
The present study investigates the impact of different trailing edge flap parameters with regard to the application on wind turbine rotor blades. For this purpose 2D airfoil and 3D rotor simulations have been performed using the CFD code FLOWer. Trailing edge flaps are realized based on grid deformation. At first the flap shape meaning rigid or elastic types and the flap length is analyzed in 2D for a representative wind turbine airfoil. The 3D study investigates the effect of the radial position and extension along the blade span. For this purpose the DTU 10 MW reference wind turbine has been chosen. The present work provides an overview of the different aspects of the aerodynamic flap design.
The authors thank the European FP7 project AVATAR for funding (Grant agreement No. 608396). This work was partly performed on the Supermuc Cluster (LRZ Munich) and the bwUniCluster (framework bwHPC, funding: state Baden-Württemberg).
- 1.Bak, C., et al.: Design and performance of a 10 mw turbine. Technical report, DTU, dtu-10mw-rwt.vindenergi.dtu.dk (2013)Google Scholar
- 4.Ferreira, C., et al.: Avatar d3.2—development of aerodynamic codes for modelling of flow devices on aerofoils and rotors. Technical report, AVATAR project (2015)Google Scholar
- 5.Johnson, S.J., et al.: Active load control techniques for wind turbines. Technical report, Sandia National Laboratories (2008)Google Scholar
- 6.Jost, E., et al.: CFD studies of a 10 mw wind turbine equipped with active trailing edge flaps. In: Proceedings of the 10th Ph.D. Seminar on Wind Energy in Europe. Orleans (2014)Google Scholar
- 7.Jost, E., et al.: A parametric CFD study of morphing trailing edge flaps applied on a 10 mw offshore wind turbine. Energy Procedia (2016)Google Scholar
- 8.Karakalas, A., et al.: Innwind d2.23—new morphing blade section designs and structural solutions for smart blades. Technical report, Innwind. EU project (2016)Google Scholar
- 9.Kroll, N., Fassbender, J.: MEGAFLOW Numerical Flow Simulation for Aircraft Design. Springer (2002)Google Scholar
- 10.Manolesos, M., et al.: Avatar d3.1—CFD and experimental database of flow devices, comparison. Technical report, AVATAR project (2015)Google Scholar
- 11.Schepers, G., et al.: Avatar: advanced aerodynamic tools of large rotors. In: 33rd Wind Energy Symposium AIAA SciTech, AIAA 2015-0497 (2015)Google Scholar
- 12.Schuff, M., et al.: Advanced CFD-CSD coupling: generalized, high performant, radial basis function based volume mesh deformation algorithm for structured, unstructured and overlapping meshes. In: 40th European Rotorcraft Forum. Southhampton (2014)Google Scholar
- 13.Schulz, C., et al.: Evaluation and control of wind turbines under different operation conditions by means of CFD. In: High Performance Computing in Science and Engineering. Springer International Publishing (2015)Google Scholar
- 14.Sørensen, N., et al.: Avatar d2.3—power curve predictions. Technical report, AVATAR project (2015)Google Scholar