Current fastaeroelastic wind turbine codes suitable for certification lack an inductionmodel for standstill conditions. A trailed vorticity model previously used asan addition to a blade element momentum theory based aerodynamic model innormal operation has been extended to allow computing the induced velocitiesin standstill. The model is validated against analytical results for anelliptical wing in constant inflow and against standstill measurements fromthe NREL/NASA Phase VI unsteady experiment. The extended model obtains goodresults in the case of the elliptical wing but underpredicts the steadyloading for the Phase VI blade in attached flow. The prediction of thedynamic force coefficient loops from the Phase VI experiment is improved bythe trailed vorticity modeling in both attached flow and stall in most cases.The exception is the tangential force coefficient in stall, where the codesand measurements deviate and no clear improvement is visible. This articlealso contains aeroelastic simulations of the DTU10 MW reference turbine in standstill at turbulent inflow with a fixed andidling rotor. The influence of the trailed vorticity modeling on the extremeflapwise blade root bending moment is found to be small.
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