Gas Turbine Propulsion Systems for Naval Vessels: Energy Flow Calculation Methodology and HighPressure Rotor CFD Simulation

This research resource focuses on the thermodynamic modeling and aerodynamic simulation of naval gas turbine propulsion systems, specifically referencing the Rolls Royce gas turbine configuration. The study addresses the challenge of optimizing energy flow and rotor performance in complex marine propulsion cycles. The methodology integrates a comprehensive thermodynamic analysis—covering atmospheric air intake, two-stage compression, combustion, high- and low-pressure turbine stages, and power turbine exhaust—with 3D computational fluid dynamics (CFD). Using polytropic compression relations and energy balance equations, the paper establishes a baseline thermal efficiency of 0.337. In the simulation phase, a 3D model of the high-pressure rotor is analyzed under three rotational regimes: 500 rad/s, 750 rad/s, and 1000 rad/s.

The CFD results demonstrate total pressure drops across the rotor of 1.1%, 1.64%, and 2.3% respectively, illustrating the relationship between rotational speed and energy extraction. For M.Tech researchers, this work provides a structured framework for process simulation, thermodynamic validation, and turbomachinery design. Note that the source analysis is limited to the specified steady-state rotational speeds and boundary conditions; transient thermal stresses and dynamic load variations are not fully detailed in the primary text.

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