Introductive Course of Naval Architecture

Explore the fundamentals of naval architecture, including buoyancy, hydrostatics and stability, and the resistance, propulsion, and maneuvering of ships. Understand propeller theory, cavitation, and how to optimize hull design.

This lecture introduces naval architecture as the design and construction of ships, predicting performance, optimizing the hull for least resistance, and performing stability analyses.

Learn basic ship terminologies—funnel, stern, hull, propeller, bulbous bow, deck, weather deck, bulkhead deck, superstructure, port and starboard—and the six degrees of freedom: surge, sway, heave, roll, pitch, yaw.

Explore diverse ship types from ferries and container ships to ro-ro vessels and warships, then examine high-speed hulls, catamarans, hovercraft, hydrofoils, buoyancy, and resistance.

Understand ship dimensions and hull coefficients, including forward and aft perpendiculars, length between perpendiculars, moulded and extreme beam and draft, and CB, midship, waterplane, and prismatic coefficients.

Explain Archimedes principle and how buoyancy balances weight through displaced fluid. Illustrate centers of gravity and buoyancy, metacentric height, ballast tanks, and ballast water's role in submarine ascent and descent.

Fouling adds living and non-living organic material to ship hulls, increasing roughness and drag until periodic docking and painting reduce fouling and restore smoother hull surfaces.

Explore how the ship power train converts engine power into brake horsepower, shaft horsepower, delivered horsepower, and thrust horsepower, and explain hull and propeller efficiency.

Examine propeller designs—three, six, and four blades, duck and controllable pitch variants—and the ideal disc concept with CFD visuals, plus engine-to-propeller power transfer producing forward thrust.

Explain the parts of a propeller—the shaft, blades, hub, and root—and how transverse thrust from two opposing propellers cancels, linking to the propeller curve and efficiency in naval architecture.

Explore cavitation in naval architecture, including bubble, sheet, and tip vortex cavitation on propellers, and how reduced static pressure causes damage and efficiency loss.

Understand maneuvering theory and how ships turn, driven by hydrodynamic forces on the hull and rudder, generating moments that affect drift angle and stability through rudder control.