A Surface Panel Method for Ducted Propellers with New Wake Model Based on Velocity Measurements

概要

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The velocity distribution downstream of a ducted propeller was measured in a cavitation tunnel by the use of a 3-component Laser Doppler Velocimeter. A considerable amount of change of the hydrodynamic pitch of the ducted propeller was observed in comparison with that of the impeller without duct. Based on these velocity measurements around the ducted propeller, a new wake model considering the effect of impeller loading was proposed to improve the prediction of the hydrodynamic performance for ducted propellers by the surface panel method. The flow fields around the ducted propeller calculated by the use of this method were shown in good agreement with the measured data as expected. The open-water characteristics of ducted propellers calculated by this method also showed good agreement with the experimental data.
社団法人日本船舶海洋工学会の論文