Comparison of the turbulence in the wakes of an actuator disc and a model wind turbine by higher order statistics: A wind tunnel study

Knowledge of the turbulence in wakes wind turbines is important to improve operation and lifetime downstream exposed these wakes. As investigation a rotating turbine can be challenging, both experimentally numerically, static actuator discs substitute turbines. To investigate similarity how turbulent inflow alters result, an experimental tunnel study presented that compares hot-wire measurements central disc model (diameter-based Reynolds number Re ≈ 300000). Two inflows are investigated, intermittent, i.e. gusty, atmospheric-like generated by active grid, non-intermittent regular grid. The data investigated using one-point higher-order two-point statistics. We find models have similar properties for all quantities within far wake. wake independent conditions, filter larger scale intermittency with regard inflow. Also, we generates its own kind dominates ambient has strong features homogeneous, isotropic turbulence.