U.S. Navy Qualification of a GE LM2500+ Gas Turbine Engine

This report is a comprehensive document citing the events pertaining to the qualification of the GE LM2500+ gas turbine engine for US Navy Service. The purpose of this report is to serve as documentation of the entire Qualification process that includes the 500-hour Rating Qualification Test and subsequent teardown inspection, High Impact Shock Testing, and the subsequent 100-hour post shock endurance test and teardown inspection. This report includes an assessment of the overall performance of the engine, General Electric’s capacity to meet specified test requirements, any questions or concerns that may have arisen during testing, and a conclusive statement about the outcome of the tests.

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Start Fuel Schedule Enhancements for the ETF40B Gas Turbine Engine

Volume 4: Cycle Innovations; Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Marine ◽

10.1115/gt2009-60357 ◽

2009 ◽

Author(s):

Joseph L. Simonetti ◽

Joseph H. McMurry

Keyword(s):

Gas Turbine ◽

Diesel Fuel ◽

Test Procedure ◽

Gas Turbine Engine ◽

Acceptance Test ◽

Fuel System ◽

Turbine Engine ◽

Fuel Flow ◽

Us Navy ◽

Engine Start

Gross starting characteristics of the Vericor Power Systems ETF40B gas turbine engine utilizing diesel fuel for the Republic of Korea Navy LSF-II application indicate inconsistent starting performance, especially in cold ambient temperatures. There is also evidence that cold starting inconsistencies exist on the US Navy LCAC installation of the ETF40B engine. The inconsistencies include late light-offs, failed starts, excessive exhaust smoke, detonative ignition and excessive commanded fuel flow by the full authority digital engine control (FADEC). The starting anomalies experienced on US Navy LCAC have ultimately resulted in the addition of starting requirements to the production engine acceptance test procedure. A detailed review of historical information regarding the TF40B fuel system characteristics resulted in the basis for establishing revised LFMV calibration values and revised FADEC engine start fuel scheduling. Additionally, this review indicated the need for fuel system flow/pressure measurements in order to establish current characteristics and to help refine component requirements and changes (as appropriate). These measurements are required over the entire engine starting and operating range. Cold ambient temperature start testing was performed to establish the engine start characteristics on JP5/JET A fuels with the existing and revised LFMV calibrations. A revised start schedule was developed that provided a reliable, stable starting characteristic (reliable first attempt starting, reducing smoking on starts, eliminating detonative ignition, minimizing large variations in commanded fuel flow during starting). The fuel system pressures and flows were fully characterized in the start and operating regime and start testing validation was performed on Diesel Fuel.

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WR21 Intercooled Recuperated (ICR) Gas Turbine Engine System Level Development Test Program Summary

Volume 1: Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery ◽

10.1115/2000-gt-0604 ◽

2000 ◽

Author(s):

Jay T. Janton ◽

Chai Uawithya

Keyword(s):

Gas Turbine ◽

Cooling System ◽

Gas Turbine Engine ◽

System Level ◽

Second Phase ◽

Gas Generator ◽

Endurance Test ◽

Test Program ◽

Engine Operation ◽

Turbine Engine

The WR21 Intercooled Recuperated (ICR) Gas Turbine engine has undergone system level development testing from July of 1994 to December 1999. There have been a total of ten engine builds and 2126 hours of engine operation performed through December of 1999. A significant number of unique development tests (experiments) have been performed over the ten engine builds. The last development test just completed and that was a USN specified 500-hour endurance test from 4 October through 16 December of 1999. All the development testing to date has been performed at the Defense Evaluation and Research Agency (DERA), Pyestock, England which is part of the UK Ministry of Defense (MOD). The last 500-hour endurance test was performed at the Advanced Propulsion & Power Generation Test Site (APPGTS) located at the Naval Surface Warfare Center Carderock Division (NSWCCD), Philadelphia, PA. The system level testing performed has evaluated the gas generator, power turbine, enclosure systems, recuperator, intercooler, and engine electronic controller (EEC). The enclosure systems include two off-engine skids (lube oil module and Intercooler Heat Exchanger module), accessory gearbox, fire protection system, enclosure cooling system, water wash, structureborne and airborne noise, fuel system and air start system. A three-phase development test strategy was employed. The first phase was to demonstrate the ICR technology and identify the highest-risk areas. Due to the unique challenges introduced by the intercooler, recuperator, variable area nozzles, and new EEC the test program was continually reviewed and revised. The second phase focused on component and system improvements. The final phase is the verification of the ICR in a 500-hr endurance test. At the completion of development testing a final design review will be held (DR5), followed by qualification testing. The qualification tests will include a 3150-hr endurance test and shock test. This paper summarizes and discusses the major tests performed during the development phases. The plan for the final development 500-hr endurance test and 3150-hr qualification test will be presented.

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Shock Testing of FT4A Gas Turbine Engine Gas Generator on the Floating Shock Platform. Phase 1

10.21236/ada951577 ◽

1963 ◽

Author(s):

R. E. Oliver

Keyword(s):

Gas Turbine ◽

Phase 1 ◽

Gas Turbine Engine ◽

Gas Generator ◽

Turbine Engine ◽

Shock Testing

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LM2500 Marine Gas Turbine Sealift Program Uprate

Volume 2: Aircraft Engine; Marine; Microturbines and Small Turbomachinery ◽

10.1115/94-gt-498 ◽

1994 ◽

Author(s):

Carl O. Brady

Keyword(s):

Gas Turbine ◽

Gas Turbine Engine ◽

Turbine Engine ◽

The Us ◽

Us Navy ◽

Qualification Testing

This paper traces the evolution of the GE LM2500 gas turbine engine in the US Navy from its initial introductory 21,500 hp (16,033 kW) rating in DD-963 class destroyers to its current US Navy Sealift Program rating of 32,000 hp (23,863 kW). Improvements to the engine and required qualification testing to establish the ratings are discussed with particular emphasis on the recent 32,000 hp (23,863 kW) Sealift Program uprate.

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