A  simplified method for calculating propeller thrust decrease for a ship sailing on a given shipping lane

Katarzyna Żelazny

doi:10.2478/pomr-2014-0015

A simplified method for calculating propeller thrust decrease for a ship sailing on a given shipping lane

Abstract

During ship sailing on rough water, relative ship motions can be observed which make the propeller emerge from the water, and decrease its thrust as a consequence. The article presents a simplified method for calculating the thrust decrease and the time of propeller emergence from water for the ship on a regular an irregular wave. The method can be used for predicting the operating speed of the ship on a given shipping lane.

Keywords:

ship motions on rough water, propeller emergence, thrust decrease

Details

Issue

Vol. 21 No. 2(82) (2014)

Section

Authors

Katarzyna Żelazny

Szczecin University of Technology, Faculty of Marine Technology

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