Effects of polyethylene-oxide solutions on the performance of a small propeller
Henderson, Lee Herman
Sanders, James V.
MetadataShow full item record
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.
Approved for public release; distribution is unlimited
Showing items related by title, author, creator and subject.
Flanagan, David B. (Cambridge, Massachusetts; Massachusetts Institute of Technology, 1962-06);The object of this study was to determine the feasibility of automatically controlling propeller pitch to reduce RPM fluctuations caused by variations in propeller speed of advance. The investigation was made ignoring ...
Flood, Kevin M. (Cambridge Massachusetts Institute of Technology, 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 ...
Bamichas, Nicolaos D. (Monterey, California. Naval Postgraduate School, 1989-03);A flight test method was developed for a quarter-scale model aircraft with minimum onboard instrumentation for the determination of the Drag Polar, the Thrust Required curve and the Power Required curve. The test included ...