LLLJP Wind Shear Formula (Power law)
The wind speed at a certain height above ground level is:
where u and uref are the mean wind speeds at the heights z and zref, respectively. The assumption of a normal wind profile or the power law relation is a common approach used in the wind energy industry to estimate the wind speed u at a higher elevation (z) using surface (usually at 10 m) or tower measurements of wind speeds Uref at reference height zref. The shear exponent (α) is typically assumed to be equal to 0.2.