The LM2500 marine gas turbine is a simple-cycle, high-performance engine. Derived from GE' CF6-6 aircraft engines, the LM2500 consists of a gas generator, a power turbine, attached fuel and lube oil pumps, a fuel control and speed governing system, associated inlet and exhaust sections, and lube and scavenge systems, as well as Controls and devices for starting and monitoring engine operation.
The LM2500 gas generator consists of a 16-stage, 18:1 pressure ratio compressor with seven stages of variable stators and inlet guide vanes; a fully annular combustor with externally mounted fuel nozzles, and a two-stage, air-cooled high- pressure turbine which drives the compressor and the accessory gearbox. A six-stage, aerodynamically coupled low-pressure power turbine which is driven by the gas generator's high-energy exhaust gas flow drives the output shaft of the marine gas turbine.
Easy to install and maintain, the LM2500 features the following: a simple modular design, marine corrosion-resistant materials and minimum size, weight and space requirements per horsepower produced. The LM2500 delivers high thermal efficiency and low fuel and airflow per horsepower produced.
The LM2500 marine gas turbine is frequently housed in a high-shock resistant, thermal , acoustic enclosure on a mounting base. The enclosure attenuates noise in the engine room and provides sensors for inlet icing and fire detection. It also houses fire extinguishing equipment. GE furnishes these modules to the US Navy and other navies.
The simple modular design of the LM2500 incorporates many features to maximize shipboard maintainability and parts replacement downtime, such as a split compressor casing, in-place blade and vane replacement, in-place hot section maintenance and accessible external fuel nozzles.