Shape Optimization of NREL S809 Airfoil for Wind Turbine Blades Using a Multiobjective Genetic Algorithm

Table 5

Comparison of of optimized airfoils: present results and those of Ritlop and Nadarajah [10].

	Present results at 23% span	Ritlop and Nadarajah [10] results at 23% span	Present results at 58% span	Ritlop and Nadarajah [10] results at 58% span	Present results at 98% span	Ritlop and Nadarajah [10] results at 98% span
Original	0.64528	0.64	0.68023	0.675	0.492	0.49
Optimal	0.7461	0.76	0.78274	0.78	0.63	0.68
improved by	15.62%	18.75%	15.06%	15.55%	28.04%	38.78%