On the evolution of turbulent scales in the wake of a wind turbine model

摘要: Wind-tunnel experimental data from the wake of a model wind turbine were used to provide scale-by-scale energetic description flow at various locations downwind turbine. Pre-multiplied spectra streamwise and vertical velocity components considered for analysis compared with those obtained in base (smooth wall condition). Results showed that relatively high-frequency range, induces strong turbulent energy into wake, which is an indicator its active character. However, large scales very observed be dampened close wall, implying also acts as high-pass filter. These two distinct processes occurring suggest conceptualize ‘active filter’. Various terms kinetic (TKE) equation estimated different study physical modulating enhanced levels turbulence intensity in...