Based on the work of Greenblatt (1978), an enhanced optimization technique for the reduction of propeller unsteady forces and the determination of skew distributions has been developed. The current method provides an efficient propeller design tool capable of determining a variety of cubic or quadratic skew distributions, subject to constraints, which minimize the unsteady forces produced by the various harmonic components of the input wake. The original skew optimization method was extended to include higher order harmonics, and the original force calculation method was replaced by an extended version of the method developed by Thompson (1976). Calculation of forces and skew distributions associated with a representative propeller show that acceptable reduction of unsteady forces can be obtained without having to place severe restrictions on the model constraints.
An optimization method for the reduction of propeller unsteady forces
Eine Optimierungsmethode fuer die Reduktion der instationaeren Propellerkraefte
AIAA-Papers ; Jan ; 1-10
1988
10 Seiten, 13 Bilder, 5 Tabellen, 19 Quellen
Conference paper
English
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