Cavitation Performance Testing of Podded Propellers with Different Hub Taper Angle

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TypeTechnical Report
Series titleTechnical Report
SubjectPodded; propellers; propulsion; cavitation
AbstractThis study presents the experimental study of some podded propellers with different hub geometry. The experiments were conducted in the cavitation tunnel at Institute for Ocean Technology (IOT), NRC Canada. Four model propellers having the same blade sections but different hub geometry were designed and manufactured and tested at different cavitating conditions. The objective was to investigate the variations of propulsive performance and cavitation characteristics of the propellers because of different hub geometry. Tests were done in various combinations of flow velocity, propeller rotational speed and tunnel pressure. All of the propellers were tested in a wide range of advance coefficients and cavitation numbers to measure propeller thrust and torque. Reynolds Number effects on performance at design cavitation number, effect of hub taper angle on cavitation inception and comparison of performance under various cavitation conditions were investigated. The study gives a suitable basis for comparison of pusher and puller propellers? performance (propeller only case) under cavitating conditions. It is concluded that the puller configuration propellers had better performance than the pusher configuration propellers under majority of test conditions. Results also show that hub taper angle does not have noticeable effect on visual cavitation inception and desinence.
Publication date
PublisherNational Research Council Canada. Institute for Ocean Technology
PlaceSt. John's, NL
AffiliationNRC Institute for Ocean Technology; National Research Council Canada
Peer reviewedNo
IdentifierTR 2007 04
NRC number6432
NPARC number8894908
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Record identifier2b24ad42-3975-4ff1-9e62-12fe8fba87c8
Record created2009-04-22
Record modified2016-10-03
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