scholarly journals The General Electric LM5000 Marine Gas Turbine

Author(s):  
Robert C. Stancliff

The General Electric LM5000 Marine Gas Turbine (see figure 1) intended for application to commercial and naval ships requiring high power (50,000 BHP nominal), high thermal efficiency (38 percent), and compact, marinized and relatively light weight prime movers is described. Ship candidates include Fast Support Ships, Aircraft Carriers [in a Combined Nuclear and Gas Turbine (CONAG) propulsion system], Battleships and large surface effect ships. The LM5000 marine gas turbine is a marinized version of the LM5000 industrial gas turbine which was derived in 1977 from the CF6-50 aircraft engine. The CF6-6 model of this family of aircraft engines was the parent of the over 648 GE LM2500 marine gas turbine now used on the ships of 18 navies, 32 ship programs and 247 ships of the world. Over 2100 of the CF6-50 mode] engines are used on over 600 of the McDonald Douglas DC-10, the Airbus A300 and the Boeing 747 aircraft. Since reliability and durability are dependent upon engine family experience, the hardware commonality with the CF6-50 aircraft engine is described as well as the associated experience, performance, installation and maintainability features.

1978 ◽  
Author(s):  
A. W. T. Mottram

The industrial gas turbine requires continual improvement in order to increase output and efficiency, to extend its life and to meet fresh environmental requirements. In the compact industrial gas turbine, derived from the aircraft engine, the required improvements are achieved in three ways: (a) new features are incorporated which have been developed to meet the specific requirements of industrial applications, (b) technical improvements developed initially for aircraft engines are applied to existing industrial engines, and (c) new engines developed for aircraft and to a higher technical standard are introduced into industrial service. This paper describes recent improvements to Rolls-Royce compact industrial gas turbines with particular reference to the Olympus C and Olympus 593.


Author(s):  
R. Goldman ◽  
R. Peterson

In the early 1970s, gas turbine technology had reached the stage where it became feasible to consider marinization of state-of-the-art aircraft engines. Approximately concurrently with these technological advances, the U.S. Navy had the need to project replacements for many of its conventionally propelled surface ships of World War II vintage. Characteristics of good fuel economy coupled with potentially viable reliability and maintenance characteristics conditioned the development of main and auxiliary gas turbine prime movers for ships. Ship design, therefore, was strongly influenced by previously unavailable power plant characteristics. New ships are building and others actively being designed to draw upon these technological advantages, and a broad base of support is being established to ensure the continued long range mobility of the U.S. Navy’s ships.


1983 ◽  
Vol 105 (1) ◽  
pp. 114-119 ◽  
Author(s):  
M. F. Collins ◽  
M. C. Muth ◽  
W. F. Schilling

The design and development of a water-cooled high temperature gas turbine has been under active investigation by the General Electric Gas Turbine Division for the past 15 years. The transition from testing small scale, laboratory-size experimental hardware to full scale industrial gas turbine components was initiated in 1975 by General Electric and extended further under the U.S. Department of Energy’s High Temperature Turbine Technology (HTTT) program. A key element in this transition was the identification of a composite (hybrid) design for the first stage nozzles. This design permits efficient heat transfer to the water-cooling passageways, thus lowering effective strains and increasing part life. This paper describes the metallurgical considerations and process technology required for such hardware. A review of the materials selection criteria utilized for the nozzle is presented, along with the results of several materials development programs aimed at determining metallurgical compatibility of the component materials, diffusion bonding behavior and both hot corrosion and aqueous corrosion performance of key materials. A brief description of the actual cascade testing of the part is given, along with results of a post-test metallurgical analysis of the tested hardware.


1970 ◽  
Author(s):  
Victor de Biasi ◽  
J. W. Sawyer

Reviews the world trends since 1966 in the application of gas turbines on both naval and merchant ships. States that the total horsepower increased from 1.9 to 5.8 million in a four-year period, with some 5.5 million horsepower in propulsion. Indicates a definite growth in commercial use from 100,000 to 390,000 hp. Attributes the significant gain in total power due primarily to the availability of proven engines, that are competitive with other prime movers, in the 20,000 hp and above size. Predicts significant increase in use of the marine gas turbine for naval as well as merchant ships when the overall ship, its utilization and supporting shore facilities are considered jointly.


1979 ◽  
Author(s):  
R. J. Rossbach

The General Electric Company is carrying out a design study and evaluation of bottoming cycles for gas pipeline compressor prime movers. Three sites were chosen for the study of demonstration organic bottoming cycles of about 5000 hp applied to three aircraft derivative gas turbines of approximately the same size. The purpose of the study is to design and evaluate all important aspects of installing organic bottoming cycle systems on a selected group of gas turbine prime movers driving gas compressors. As a result of the study, it was found that pipeline bottoming cycles applied to gas turbine prime movers could reduce the heat rate 35 percent more than the Department of Energy target value of 20 percent. Installation designs for three sites are described.


Author(s):  
O. C. Schoeppner

Low first cost and little need for maintenance assure the industrial gas turbine an important place for many applications where the lower thermal efficiency as compared with other prime movers is not a decisive factor. The simplicity of the gas turbine finds its best expression in the compact integrated single shaft design featuring a single compressor-turbine rotor supported in two bearings, the whole including the combustion system being contained in a common casing structure. The recognized need for simplicity together with reliability has been the main consideration in the design of the unit presented in the following description. At present, an intensive test program is under way and it is expected that the new Clark gas turbine will soon be ready for installation.


Author(s):  
William H. Day

This paper describes the FT8 gas turbine, which has been introduced by Turbo Power and Marine Systems (TPM). The FT8 is derived from the Pratt & Whitney JT8D aircraft engine and the TPM FT4 industrial gas turbine. The FT8 has been launched with a collaboration program between TPM and the China National Aerotechnology Import-Export Corporation (CATIC) of the People’s Republic of China. The collaboration program includes co-production of certain components and a 37-unit order from CATIC over a 10-year period for marine and industrial applications.


Author(s):  
W. R. Humphrey ◽  
L. M. Maas

The Allison Model 501-K14 industrial gas turbine engine, a modified version of the T56 aircraft engine, has been used extensively as a prime mover for industrial applications. The areas of application to date have been in the gas transmission field driving centrifugal gas compressors and driving electrical generators. This paper describes a 1000-hr cyclic test of the Model 501-K14 engine with salt water ingestion as the first step in qualifying the engine for marine application. Performance data, photographs of the installation and engine components, and inspection results are included in this report.


Author(s):  
Li-Chieh Hsu ◽  
Wu-Chi Ho ◽  
Chien-Ching Hsueh

A novel Air Start Unit powered by gas turbine engine is developed. The feature of this unit is that it can start various aircraft engines, including the hundred thousand pound thrust class engine like GE90, with different air flow rate in a compact design. This paper introduces the complete design and development of large centrifugal compressor, digital engine control system, testing of gas turbine system.


1978 ◽  
Author(s):  
E. L. Wheeler

The Garrett GTPF990 gas turbine engine is being developed under a U.S. Navy contract to fulfill both propulsion and generator drive repuirements. This is a unique second-generation marine engine that is not derived from an aircraft engine counterpart. The engine development is nearing completion, endurance testing has started, and all other qualification testing has been conducted. This paper is a development status report. A description of the engine and special maintenance features is presented. Emphasis is placed on qualification test results, development test experience, and the resulting design improvements.


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