Wear and Friction in a Controllable Pitch Propeller

Wear and Friction in a Controllable Pitch Propeller

Godjevac, M.

Stapersma, D. (promotor)

Mechanical, Maritime and Materials Engineering

Marine and Transport Technology

2010-01-18

The author is a naval architect and this book is his PhD thesis. In this research the author focuses on friction in a controllable pitch propeller (CPP), formation of wear in a CPP system, and their mutual dependence. Instead of going deeply only in tribology aspects, the author tries to get an overall description of the problem incorporating hydrodynamic and mechanical aspects of a CPP. By doing so, the author concludes that total wear is the result of several wear mechanisms but in the first place fretting and sliding wear. An attempt has been made to explain the existence of fretting as a consequence of too high oscillations in the wake speed when the ship is sailing in seaway. Wear experiments presented in this book show fretting wear to be more dangerous than other wear mechanisms in CPP. At the end, based on experiments and previous analysis, the author presents a total wear model for a CPP. This book is useful for marine engineers to better understand the properties and limits of a CPP in real service conditions. It further can be an example how to use a multi disciplinary approach in solving a specific problem. Also it can be useful for tribology experts to get an impression of the problems the marine people encounter and how these relate to their own expertise.

Controllable Pitch Propeller (CPP)
Friction
Friction modelling
Wear
Wear experiments
fretting
fretting experiments
sliding wear
sailing in seaway
real service conditions
multi-disciplinary approach

http://resolver.tudelft.nl/uuid:ebcaff3c-a203-49e4-aa41-0d9040f5d0c6

978-90-8891-136-1

Institutional Repository

doctoral thesis

(c) 2009 Milinko Godjevac