Question: 5 ( 3 0 % ) The flow over a wind turbine can be simplified by momentum theory. The detail geometry of the wind turbine

5(30%) The flow over a wind turbine can be simplified by momentum theory. The detail geometry of the wind turbine is replaced by a so-called actuator disk with A as cross sectional area. Within the stream tube, Assume the free stream velocity is UI and the wake flow velocity is U4, and the velocities before and after the actuator disk are identical
5 ( 3 0 % ) The flow over a wind turbine can be

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