Abstract. A synergistic design strategy for ducted horizontal axis wind turbines (DWTs), utilizing the numerical solution of a ducted actuator disk system as the input condition for a modified blade element momentum method, is presented. Computational results of the ducted disk have shown that the incoming flow field for a DWT differs substantially from that of a conventional open rotor. The rotor plane velocity is increased in the ducted flow field, and, more importantly, the axial velocity component varies radially. An experimental full-scale 2.5 m rotor and duct were designed, using this numerical strategy, and tested at the University of Waterloo's wind turbine test facility. Experimental results indicated a very good correlation of the data with the numerical predictions, namely a doubling of the power output at a given velocity, suggesting that the numerical strategy can provide a means for a scalable design methodology.

Abstract.A synergistic design strategy for ducted horizontal axis wind turbines (DWTs), utilizing the numerical solution of a ducted actuator disk system as input conditions for a modified blade element momentum method, is presented.Computational results of the ducted disk have shown that the flow field for a DWT differs substantially from that of a conventional open rotor. The rotor plane velocity is higher in the ducted flow field, and more importantly, the axial velocity component varies radially. An experimental full scale 2.5m rotor and duct were designed, using this strategy, and tested at 10 the University of Waterloo's wind turbine test facility. Experimental results indicated a very good correlation of the data with the numerical predictions, that being a doubling of the power output at a given velocity.

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