Wind Energy

234 C. Bak et al.
Results from 2D CFD computations at Re = 6 × 10 6 , corresponding to
megawatt size wind turbines, showed a further increase in maximum lift and
in design lift.
The fact that the Risø-B1 airfoils had very high maximum lift and were
only slightly sensitive to leading edge roughness can be used for increasing
the design lift and thereby designing less solid rotors and still obtain reliable
energy production.
42.5 Acknowledgements
The Danish Energy Authority funded this work (ENS 1363/00-0007, “Program
for research in aeroelasticity 2000–2001” and ENS 33030-0005, “Program for
applied research in aeroelasticity 2004,” ENS 33030-0005).
References
1. Fuglsang P, Bak C, Gaunaa M, Antoniou I, Design and verification of the Risø-
B1 airfoil family for wind turbines, Solar Energy Engineering 126, 1002–1010
2004
2. Fuglsang P, Dahl KS, Multipoint optimization of thick high lift airfoil for wind
turbines, Proc. EWEC’97, 6–9 October 1997, Dublin, Ireland, pp. 468–471
3. Sørensen NN, General Purpose Flow Solver Applied to Flow over Hills, Risø-R-
827(EN), Risø National Laboratory, Denmark, 1995
4. Michelsen JA, Basis3D – a Platform for Development of Multiblock PDE
Solvers, Technical Report AFM 92-05, Technical University of Denmark, 1992
5. Fuglsang P, Antoniou I, Sørensen NN, Madsen HA, Validation of a Wind
Tunnel Testing Facility for Blade Pressure Measurements, Risø-R-981(EN), Risø
National Laboratory, Roskilde, Denmark, 1998
6. Fuglsang P, Bak C, Gaunaa M, Antoniou I, Wind Tunnel Tests of Risø-
B1-18 and Risø-B1-24, Risø-R-1375(EN), Risø National Laboratory, Roskilde,
Denmark, 2003