A theoretical method for determining optimum circulation distributions for propeller/stator combinations and determining the circumferential variation in circulation for non-axisymmetric stators is presented. Comparisons of theoretical predictions and water tunnel measurements are given for a given propeller operating behind an axisymmetric and a non-axismmetric stator. Theoretical comparisons are made between a hypothetical propeller designed to operate without a stator, and optimum propeller/stator design. This comparison includes predictions of efficiency, unsteady loading and cavitation.

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