Naval Architecture II

• SHIP RESISTANCE & POWERING

• Components of ship resistance

• Determination of ship resistance

• Model experiments

• Froude’s Law of comparison

• Effective power calculations

• Ship correlation factor (SCF)

• Admiralty coefficient

• Fuel Coefficient

• Fuel Consumption

• Application of ITTC method

• Propulsion of Ships and Propellers

• Propellers – geometry terminology

• Apparent and real slip

• Power and efficiencies in ship propulsion system

• QPC, Law of similitude

• Model tests with propellers

• Open water characteristics

• Propeller Diagrams

• Wake and wake distribution, Thrust deduction fraction

• Cavitation – cavitating flows, types of propeller cavitation

• Detrimental effects of cavitation

• Criteria for prevention of cavitation

• Special types of propeller arrangements – FPP, CPP

• Propellers in Nozzles, Paddle wheel

• Vertical axis propellers – Voith Schneider, Jet propellers

• Ship model correlation, ship trials

• Propeller Design Theories

• Simple theories of propeller action

• Momentum theory of the propeller

• Blade element theory

• Circulation theory

• Lifting line theory

• Ship Propeller and Machinery Interaction

• Propulsion Machinery layout

• Ship propeller interaction

• Influence of condition of the ship

• Number of propeller blades

• Propeller area ratio, pitch ratio, service condition

• Wake and thrust deduction

• Interaction at extreme loading

• Specification of speed power and rate of revolution

• Choice of design point

• Engine propeller matching

• Choice of propeller, ship trials

• Acceleration and retardation tests

• Rudder Theory

• Basic requirements of rudder

• Physics of control surfaces Properties of hydrofoils – lift and drag

• Action of the Rudder in turning a ship. Rudder nomenclature. Types of rudders

• Area and shape of rudder, position of rudder, stern rudders & bow rudders

• Force on rudder. Torque on stock

• Angle of heel when turning, Controllability of ships, Directional stability definitions

• Measures of manoeuvrability

• Model experiments and full scale manoeuvring trials – course keeping, course changing

• Emergency manoeuvre qualities, turning test

• Z-manoeuvre test, modified Z-manoeuvre test

• Direct spiral test, reversed spiral test, pull-out test, stopping test, stopping inertia test

• New course keeping test, man-overboard test

• Parallel course manoeuvre test, initial turning test

• Accelerating turning test, acceleration / deceleration test

• Thruster test, minimum revolution test, crash ahead test

• Manoeuvrability activities of IMO

• Motion of Ship on Waves

• Theory of Waves

• Trochoidal Waves

• Sinusoidal Waves

• Irregular Wave Pattern

• Wave spectra

• Ship motions

• Forces caused by ship motions

• Anti-rolling devices