Jason.Jonkman wrote:Dear Yingyi.Lin,
I agree with points (1) and (2), but point (3) and your picture are not correct. Regarding (3), the thrust for an upwind wind turbine should be directed along positive x. Regarding your picture, it would be correct if you rotate each blade 180 degrees around its z axis, such that x points downwind and the rotor spins clockswise (when looking downwind) opposite to the direction of y.
Thanks. So does it mean that a wind turbine always spins clockwise (looking downwind), no matter it is an upwind or a downwind turbine? Is this understanding correct?