15.05.2015 Views

Textos de Apoio (pdf)

Textos de Apoio (pdf)

Textos de Apoio (pdf)

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Basic Principles of Ship Propulsion<br />

Contents:<br />

Page<br />

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3<br />

Scope of this Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . 3<br />

Chapter 1<br />

Ship Definitions and Hull Resistance . . . . . . . . . . . . . . . . . . 4<br />

• Ship types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4<br />

• A ship’s load lines. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4<br />

• Indication of a ship’s size . . . . . . . . . . . . . . . . . . . . . . . . 5<br />

• Description of hull forms . . . . . . . . . . . . . . . . . . . . . . . . 5<br />

• Ship’s resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7<br />

Chapter 2<br />

Propeller Propulsion . . . . . . . . . . . . . . . . . . . . . . . . . . . 10<br />

• Propeller types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10<br />

• Flow conditions around the propeller . . . . . . . . . . . . . . . . . . 11<br />

• Efficiencies . . . . . . . . . . . . . . . . . . . . . . . . . . . · · · · 11<br />

• Propeller dimensions . . . . . . . . . . . . . . . . . . . . . . · · · · 13<br />

• Operating conditions of a propeller . . . . . . . . . . . . . . . . . . . 15<br />

Chapter 3<br />

Engine Layout and Load Diagrams . . . . . . . . . . . . . . . . . . 20<br />

• Power functions and logarithmic scales . . . . . . . . . . . . . . . . . 20<br />

• Propulsion and engine running points . . . . . . . . . . . . . . . . . . 20<br />

• Engine layout diagram . . . . . . . . . . . . . . . . . . . . . . . . . 22<br />

• Load diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22<br />

• Use of layout and load diagrams – examples . . . . . . . . . . . . . . 25<br />

• Influence on engine running of different types<br />

of ship resistance – plant with FP-propeller . . . . . . . . . . . . . . . 27<br />

• Influence of ship resistance<br />

on combinator curves – plant with CP-propeller . . . . . . . . . . . . 29<br />

Closing Remarks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30<br />

References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!