Ship Resistance and Propulsion

At the end of this course, the students should be able to: 1. analyse the various components of ship resistance and propulsion; 2. explain the hydrodynamics of ship in restricted water and in rough sea; 3. perform propeller design, matching to hull, performance evaluation, optimisation and cavitation prevention; and 4. describe ship maneuverability, sea-worthiness, form effects and powering.

Resistance of ship. Components of resistance. Laws of comparison. Model tests. Resistance in restricted water and resistance of small and fast ships. Methods of ship resistance calculations. Determination of engine power. Steering of ships. Types of rudders. Maneuverability. Seaworthiness of a ship. Fundamentals of ship; propulsion. Effects of hull forms, sea state and route constraints. Propulsion devices. Geometry of screw propeller. Momentum theory of the screw. Axial and tangential losses. The propulsion coefficients. The influence of after body on wake distribution. Model tests and laws of comparison. Systematic screw-series. Hydrodynamic characteristics. Matching of propeller to the hull. Cavitation. Design of screw propellers. Performance curves. The screw propellers performance in different load conditions. Controllable pitch propellers. Calculations, design and drawing of screw propeller.