Marine Steam and Gas Turbines

At the end of this course, the students should be able to: 1. evaluate the operating principles and efficiencies of thermodynamic cycles; 2. describe steam and gas turbines and combined power plants, their theory, design configurations and optimisation; 3. evaluate turbomachinery: theory, designs, performance and design limitations; and 4. explain the use of governors, safety devices, glands, couplings, seals.

Principles of operation and classification. Rankine cycle, reheat cycle, regenerative cycle, reheat/regenerative cycle and cycle efficiencies. Theory of steam expansion in cascade. Gas turbine. Principles of operation and classification. Brayton cycle, heat exchange cycle, reheat cycle, intercooled cycle, intercooler/reheat/heat exchange cycle, cycle efficiencies, combined steam and gas turbine cycles. Turbomachinery theory: Expansion of fluids in nozzles. Expansion process in turbine stator blades, work done in turbine rotors, velocity distribution across compressor and turbine, pressure, velocity and pressure-velocity compounding. Steam turbine construction: Governors, safety devices, glands, couplings, Astern turbine, blades, rotors, blade fixing, seals, casings and condensers. Gas turbine construction. Rotors, compressor blades, intakes, combustors, turbines and exhausts.