Publication:
Effects of polyethylene-oxide solutions on the performance of a small propeller

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Authors
Henderson, Lee Herman
Subjects
Propeller performance
Polyethylene-Oxide
Polymeric friction reduction
Acoustic blade signal
Propeller
Polymer
Hydrofoil
Advisors
Sanders, James V.
Date of Issue
1971-09
Date
September 1971
Publisher
Monterey, California ; Naval Postgraduate School
Language
en_US
Abstract
The thrust and torque were measured and the efficiency calculated for a 14.6-cm diameter, two-bladed propeller in aqueous solutions of polyethylene oxide, WSR-301, with concentrations ranging from 0 to 75 wppm (weight parts per million). The full operating range of the propeller was studied. For the propeller operating under heavily loaded conditions, the thrust decreases with increasing concentration while the torque passed through a minimum at 10 wppm. This resulted in an increase in efficiency ( p=vr/Qw, where V is the speed of advance, T is the thrust, Q is the torque, and w is the angular frequency of rotation) of up to 10% at 10 wppm. For the propeller operating under lightly loaded conditions, the polymer had little effect on performance. If these results are applicable to full-sized propellers, drag-reducing polymers would not effect propeller performance significantly. Acoustic measurements were also made and they indicate that the polymer has no effect on the strength of the discrete components of the radiated propeller noise.
Type
Thesis
Description
Series/Report No
Department
Physics
Other Units
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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