Evaluation of a 50,000 HP Marine Gas Turbine for Use in Future U.S. Navy Surface Ships Free

Analytical studies conducted by the U.S. Navy for the future marine gas turbine propulsion engines have concentrated in the mid-20,000 horsepower (HP) range. This power range meets the propulsion requirements of current surface ships, such as auxiliary and amphibious, frigate, destroyer, and light-cruiser ship types. In looking at future ship propulsion requirements, the possibility of developing a 50,000 HP marine gas turbine should be considered. This paper discusses the results of an initial investigation into the feasibility of a 50,000 HP marine gas turbine propulsion engine for surface ships. The current U.S. Navy 25,000 HP marine gas turbine and a theoretical 50,000 HP marine gas turbine propulsion engine performance characteristics are compared to establish performance trends of simple cycle marine engines. In addition, an advanced cycle 50,000 HP gas turbine with intercooling and recuperating is analyzed. This paper provides comparative results of engine performance for various ship operating profiles, engine size and weight and developmental cost.