The theory of measuring the spectral coherence by means of a lidar
anemometer has been outlined. It is based on the assumption that
the turbulent velocity field can be considered statistically locally
isotropic and on the validity of Taylor’s hypothesis. This implies
that the longitudinal coherence cannot be predicted realistically.
Special emphasis has been placed on the effect of line average
along the beam. One section has been devoted to the effect of
spectral aliasing, which may cause severe problems in the
interpretation of measured data. This work is considered the
theoretical background for the understanding of the coherences
calculated on basis of real date.
|Series||Denmark. Forskningscenter Risoe. Risoe-R|
- Wind power meteorology
- Wind Energy