• A three-bladed wind turbine with a radius of 3 meters receives wind at 8 m / s. The turning speed of the turbine is 78 rpm.
• (a) What is the specific speed, l at which the wind turbine is turning?
• (b) If we want to generate as much energy as possible, is this turbine operating optimally?
• (c) What is the relative speed of the wind over the turbine at the end of the blade?
• (d) If you want the angle of attack at this point (end of the blade) to be 15º, how much should the angle of clearance be worth at this point?
• (e) If the ambient pressure is 80 kPa and the air temperature is 10 C. How much power would this turbine be producing? (
• f) Regarding the previous part, what percentage of the Betz power does the power calculated in the previous part represent? (Raire = 0.287 kJ / kg.K)