The far wake of porous disks and a model wind turbine: Similarities and differences assessed by hot-wire anemometry

The wakes of two different porous disks have been evaluated experimentally. Such are commonly used as physical actuator disk analogs for wind turbines. One is made a uniform wire mesh, while the other has nonuniform design with radial spars connected by rings. same solidity and produce approximately drag. also compared to wake model turbine solid disk. In contrast earlier studies, far wake, up 30 diameters downstream, included in comparison. near velocity deficit turbulence intensity profiles differ significantly. High levels increase transverse transport which leads faster spreading lower deficits turbine. gradients give rise production farther maintaining higher wake. addition, coherent vortex shedding only identified None were able replicate asymmetric features Nonetheless, results highlight important flow physics that should be considered process surrogate.