Propeller caviation in solutions of polyethylene oxide.
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Authors
White, Robin John.
Subjects
Advisors
Sanders, J.V.
Date of Issue
1971-12
Date
Publisher
Monterey, California ; Naval Postgraduate School
Language
en_US
Abstract
The inception and formation rates of bubble cavitation on
a l4.8-cm diameter, two-bladed propeller were measured in homogeneous
aqueous solutions of polyethylene oxide, WSR-301, at concentrations
ranging from to 100 wppm (weight parts per million).
Rotational speeds ranged from 1300 to 2000 rpm. At concentrations
of 25 wppm and greater, inception was delayed by approximately
150 rpm, and at 2000 rpm the number of bubble collapses measured
over a 10-second period was reduced by at least 40 percent. If
these results can be extended to full size propellers, ships can
increase their propeller rotation rate while producing the same
amount of cavitation noise. Measurements of the radiated noise
spectra of bubble collapses showed that the higher frequency components
are somewhat attenuated in polyethylene-oxide solutions.
Type
Thesis
Description
Series/Report No
Department
Physics
Organization
Naval Postgraduate School