CFD wake modeling using a porous disc - WindSim

Conclusions• An actuator disc concept is applied to model awind turbine in RANS simulations of a singleWECS wake. A uniform pressure drop is appliedon the disc; the value of the pressure drop iscalculated from the thrust coefficient and axialinduction factor. From comparison with WT [1]tests the wind deficit predicted by the CFDsimulations is the under predicted in the nearwake (2D diameters downstream), the level ofwind deficit is instead correctly predicted at 6Ddownstream while in the far wake the winddeficit is overestimated. When comparing thepresented actuator disc to some analyticalmodels the best match is found to the Larsen[3].