Introduction to wind turbine design
نویسندگان
چکیده
2.1 Structure of the atmospheric boundary layer Wind is moving air caused by pressure differences in the atmosphere, initiated by temperature differences. At large heights (~1000 m) the wind is not perpendicular to the isobars but parallel to it due to the Coriolis force (perpendicular to the wind direction, caused by the rotation of the earth). This wind is denoted the geostrophic wind. G : pressure gradient force Ug : geostrophic wind C : Coriolis force U : wind at the ground W : drag force (friction)
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