Tidal Modelling Spectra
The spectrum of turbulence describes the frequency content of tidal-speed variations [21]. According to the Kolmogorov law, the spectrum must approach an asymptotic limit proportional to n^(-5/3) (here n denotes the frequency, in Hz). This relationship is based on the decay of turbulent eddies to higher frequencies as turbulent energy is dissipated as heat [21].
Two of the turbulence spectra models describing atmospheric turbulence are the Von Kármán and Kaimal models [21]. Primarily used for applications related to flat terrain, including wind turbines, these provide a good basis for examining turbulence-induced loads for tidal turbines.
Basic equations for the two spectral models:
Two of the turbulence spectra models describing atmospheric turbulence are the Von Kármán and Kaimal models [21]. Primarily used for applications related to flat terrain, including wind turbines, these provide a good basis for examining turbulence-induced loads for tidal turbines.
Basic equations for the two spectral models: