TRANSACTIONS OF THE KRYLOV STATE RESEARCH CENTRE

Science journal

 
ISSN (print) 2542-2324 /(online) 2618-8244


Articles of The Transactions of KSRC








Design of adjustable pitch propellers for ships operating under various conditions and propulsion performance evaluations.



Full text article ( in russian)

Year

 
2013

Issue

 
357

Volume

 
1

Pages

 
33-40

Caption

 
Design of adjustable pitch propellers for ships operating under various conditions and propulsion performance evaluations.

Authors

 
L.I. Vishnevsky, А.R. Togunyats

Keywords

 
adjustable pitch propellers, off-design propeller modes

Summary

 
The fixed pitch propellers (FPP) designed for the maximum speed in calm water fail to provide optimum propulsion performance under other operating conditions. In reality the operating conditions are continuously changing, in particular this is the case for the vessels intended to operate under different modes like tugboats, hydrofoil boats, etc. Under these circumstances the penalties associated with deviations from optimum operating conditions for the propeller may be quite tangible. This fault can be eliminated if we use controllable pitch propellers (CPP). However, this is a costly option due to high costs of CPP and related maintenance.
A more simple technical solution would be to use adjustable pitch propellers. The blades of such propellers are adjusted to optimum position by inertial and hydrodynamic forces. At present a number of design options are suggested. However, in practice only one design option has been implemented. According to this design propeller blades are adjusted in the propeller disk plane. By today three prototypes of such propeller type have been developed for vessels of different types.
This paper addresses the issues related to the proper choice of the pivotal axis for blade rotation about the hub as well as mass and size of the blades. In conclusion the paper gives propulsion performance estimations for vessels operating under various conditions. It is shown that these propulsors are efficiently maximizing the performance of such ships.

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