windpowerlib.tools.estimate_turbulence_intensity

windpowerlib.tools.estimate_turbulence_intensity(height, roughness_length)[source]

Estimate turbulence intensity by the roughness length.

Parameters:
  • height (float) – Height above ground in m at which the turbulence intensity is calculated.
  • roughness_length (pandas.Series or numpy.array or float) – Roughness length.

Notes

The following equation is used [1]:

TI=\frac{1}{\ln\left(\frac{h}{z_\text{0}}\right)}

with:
TI: turbulence intensity, h: height, z_{0}: roughness length

References

[1]Knorr, K.: “Modellierung von raum-zeitlichen Eigenschaften der Windenergieeinspeisung für wetterdatenbasierte Windleistungssimulationen”. Universität Kassel, Diss., 2016, p. 88