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

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Author
Henderson, Lee Herman
Date
1971-09
Advisor
Sanders, James V.
Second Reader
Houlihan, T.M.
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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.
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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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http://hdl.handle.net/10945/15688
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  • 1. Thesis and Dissertation Collection, all items

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    Automatic control of propeller pitch 

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    Propeller performance analysis using lifting line theory 

    Flood, Kevin M. (Monterey California. Naval Postgraduate School, 2009-06);
    Propellers are typically optimized to provide the maximum thrust for the minimum torque at a specific number of revolutions per minute (RPM) at a particular ship speed. This process allows ships to efficiently travel at ...
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    Flight test method development for a quarter-scale aircraft with minimum instrumentation 

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