João P. Monteiro has done some interesting studies of the performance of a 1200 diameter Recipe blade set in a wind tunnel and compared the results with theoretical predictions of a couple of simulation progams. The results are close. It’s unusual to see real world data for the Cp (performance) versus tip-speed-ratio. This can help us design wind turbines to avoid stall and maximise efficiency.
The full article in Journal of Wind Engineering and Industrial Aerodynamics is for sale here.