The design of a ducted propeller operating behind a body of revolution is a complex problem which requires design iterations in order to achieve suitable self-propelled conditions. The interaction of stern and propulsor cannot be handled in a traditional way for the case of a very full afterbody. A Navier-Stokes equations solver has been selected to compute the flow past the afterbody/ducted propulsor configuration. The rotor is modeled as an actuator disk with finite thickness. Computational results are shown to compare favorably with published data for fine sterns and open propellers.Illustrative calculations are also presented for a full stern fitted with two different ducts.

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