Prof. Dan Constantin OBREJA

Code = EMSHIP S3-2 (Semester 3)

Workload: 60 h lecture, lab

Number of credits: 5

Objectives :

The objective is to provide the specific knowledge about the ship propulsion devices, taking into consideration not only the classical propulsion means (screw propellers), but also the unconventional ones. The course will focus on:

a)Fundamentals of propeller theory;
b)Flow mechanisms;
c)Cavitation;
d)Unconventional propulsion arrangements;

Contents:

Propellers 
Propeller curves 
Analysis of propeller flows 
Overview of methods 
Momentum theory 
Lifting-line methods 
Lifting-surface methods
Boundary element methods 
Field methods
Cavitation 
Experimental approach 
Cavitation tunnels
Open-water tests
Cavitation tests
Propeller design procedures 
Propeller-induced pressures 
Unconventional propulsion arrangements
Rudder propeller
Overlapping propellers 
Contra-rotating propellers
Controllable-pitch propellers
Kort nozzles
Further devices to improve propulsion

Recommended reading (list of references relevant to the course topics, textbooks, conference proceedings, ...)

1.Breslin, J. P. and Andersen, P. (1994). Hydrodynamics of Ship Propellers. Cambridge University Press
2.Kerwin, J. E. (1986). Marine propellers. Ann. Rev. Fluid Mech. 18, pp. 387–403
3.Kerwin, J. E. and Lee, C. S. (1978). Prediction of steady and unsteady marine propeller performance by numerical lifting-surface theory. Trans. SNAME 86, pp. 218–253
4.Kerwin, J. E., Kinnas, S. A., Lee, J. T. and Shih, W. Z. (1987). A surface panel method for the hydrodynamic analysis of ducted propellers. Trans. SNAME 95, pp. 93–122
5.Kinnas, S. A. (1996). Theory and numerical methods for the hydrodynamic analysis of marine propulsors. Advances in Marine Hydrodynamics. Comp. Mech. Publ., pp. 279–322

Prerequisites:

The lecture “Advanced Ship Propulsion” (5 Credits) is an advanced and complementary design oriented course in the ship hydrodynamics, focusing mainly on the propulsion. It follows the preparation in advanced ship hydrodynamics provided by the Ecole Centrale de Nantes, therefore the following lectures have to be passed successfully:

• • Water Wave and Sea State Models for Ship Design
  • Seakeeping: Theory & Numerical Modelling
  • CFD for Ship Hydrodynamics
  • Experimental Ship Hydrodynamics (5 ECTS)

Form of exams:

Written exam (3 hours) , oral (1 hour)