Conclusions Data Analysis Unfortunately BEM predications couldn t be made for this geometry because of the thin blades used and the bars between the blades. Averaging Necessary as the turbine used was variable speed, therefore inertial effects caused delays in reactions to changes in the wind speed. Unfortunately there was less data at high tip speed ratios so the averaging times for this data was decreased. Many points at the origin were added to weight the fits towards passing through the origin. A polynomial of degree three was found to give the best shape.
Turbulence also decreases performance at higher tip speed ratios.
These results show turbulence should be a parameter in an investigation of stall delay .