《Airfoil_Delft_Uni_DU_family_2016》.pdf

AIAA-2003-0352 SUMMARY OF THE DELFT UNIVERSITY WIND TURBINE DEDICATED AIRFOILS W.A. Timmer and R.P.J.O.M. van Rooij Delft University Wind Energy Research Institute, Faculty of Civil Engineering and Geosciences Stevinweg 1, 2628 CN Delft, The Netherlands w.a.timmer@citg.tudelft.nl, r. vanrooy@citg.tudelft.nl ABSTRACT JOULE program, the Netherlands Agency for Energy and the Environment (NOVEM) and by various This paper gives an overview of the design and wind European blade manufacturers. At present DU airfoils tunnel test results of the wind turbine dedicated airfoils are being used by various wind turbine manufacturers developed by Delft University of Technology (DUT). world wide in over 10 different rotor blades for turbines The DU-airfoils range in maximum relative thickness with rotor diameters ranging from 29 m. to over 100 m., from 15% to 40% chord. The first designs were made with XFOIL. Since 1995 RFOIL was used, a modified version of XFOIL, featuring an improved prediction around the maximum lift coefficient and capabilities of predicting the effect of rotation on airfoil characteristics. The measured effect of Gurney flaps, trailing edge wedges, vortex generators and trip wires Figure 1: A series of DU airfoils for a pitch on the airfoil characteristics of various DU-airf