Due to its design, the S809 airfoil was calculated to begin stalling at approximately 10-degrees angle of attack and hold lift over a large range of angles. This lift characteristic helps maximize and control the power output of the turbine.
Wind turbines use stall to control power output of a system.
Unit of measurement is Mach number. Duque anticipates running code on an SGI Origin 2000 for the phase six calculations in winter 2001. The wind turbine team has made measurable progress in the area of wind power production by providing industry with detailed experimental data and valid computational methods. Professor C.P. Van Dam and students at the University of California at Davis provide support for the computational component of NREL 's UAE project.