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The wind is coming from the z-direction at 12 m/s which is a typical rated wind speed for a turbine this size. This incoming flow makes the blade rotate at an angular velocity of -2.22 rad/s about the z-axis (the blade is thus spinning clockwise when looking at it from the front, like most real wind turbines). This blade therefore has a tip speed ratio, which is the ratio of tip velocity to incoming wind, of 8 (also a typical value). 

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