Title: Optimum Circulation Distributions for a Class of Marine Propulsors
Abstract: A new method for determining the optimum circulation distributions for both single- and multiple-stage marine propulsors is developed. The lifting-line model for the propulsor is first discretized with a vortexlattice. Variational calculus is then applied to this discretized problem. The result is a general procedure for determining optimum circulation distributions. This procedure can be readily extended to increasingly complex combinations of interacting lifting lines. The propeller lifting-line, vortex-lattice model is described in some detail. Circulation optimization equations for a propeller are derived. The equations are shown to recover traditional results for both light and moderate propeller loading, as well as for wake adapted propellers. Optimization equations for the torque limited case are presented. The vortex-lattice model for multiple stage propulsors is described and the optimization equations are derived. Examples of optimum circulation distributions for contrarotating propellers, a vane-wheel propulsor, and a propeller with pre-swirl stator are presented.
Publication Year: 1992
Publication Date: 1992-09-01
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 6
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