3D-simulation of the turbulent wake behind a wind turbine

Effects of Support Structures in an LES Actuator Line Model of a Tidal Turbine with Contra-Rotating Rotors

“…The resulting power spectrum in Figure 8b contains a sharp peak around 0.22-0.225 Hz. For u H = 2 ms −1 , Equation (13), this gives a Reynolds number of Re ≈ 3.37 × 10 6 and a Strouhal number of St = 0.3300-0.3375. Although this is above the values reported by Roshko [54] (St = 0.26-0.28) and Shih et al [47] (St = 0.25), it falls within the lower limit of the measurements of Delany and Sorensen [45] who calculated St = 0.32-0.45, which is within the accepted range of Strouhal numbers given in the literature.…”

“…Detailed reviews of wind turbine and wind farm wake modelling are given by Barthelmie et al [10], Sanderse et al [11] and Creech and Früh [12]. One striking feature of these models is that, barring a few exceptions [13,14], the turbine support structure is not modelled explicitly, and so, only the rotors affect the downwind flow. It is quite likely that, in the mid-to-far wake region, wake effects due to the structure are not important in wind farms; indeed, previous, validated studies of single wind turbines [15] and wind farms [4,16] have indicated that the tower and nacelle have negligible impact on the wake and consequently the performance of downwind turbines.…”

Wind-structure interaction simulations of ovalling vibrations in silo groups

“…Nevertheless LES is gradually making its entrance in simulations for industrial applications as well although mainly on an academic level, e.g. for the design of wind turbines [37,287] and the choice of locations or arrangements of wind farms [166,213,290].…”

Effects of Support Structures in an LES Actuator Line Model of a Tidal Turbine with Contra-rotating Rotors

“…Detailed reviews of wind turbine and wind farm wake modelling are given by Barthelmie et al [9], Sanderse et al [10] and Creech and Früh [11]. One striking feature of these models is that, bar a few exceptions [12,13], the turbine support structure is not modelled explicitly, and so only the rotors affect the downwind flow. It is quite likely that, in the mid-to-far wake region, wake effects due to the structure are not important in wind farms; indeed previous, validated studies of single wind turbines [14] and wind farms [4,15] have indicated that the tower and nacelle have negligible impact on the wake and consequently the performance of downwind turbines.…”