Development of a Controlled-Expansion Superalloy for Use in Aircraft Gas Turbines

1995 ◽  
Author(s):  
James M. Dahl ◽  
John B. Hansen
Keyword(s):  
Gas Turbines ◽  
Room Temperature ◽  
Coefficient Of Thermal Expansion ◽  
Base Alloy ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Original Design ◽  
Nickel Base ◽  
Potential Customers ◽  
Selection Of

This paper describes the methodology employed to produce a controlled expansion superalloy that has been successfully incorporated in several advanced aircraft gas turbine engines. Objectives of the original R&D study are reviewed in light of requirements given by potential customers. Properties of the alloy are presented and compared to those objectives. It is reported that the alloy has mechanical properties similar to those of the nickel-base alloy 718, and a low coefficient of thermal expansion between room temperature and its Curie temperature of 320°C. It also reported that the alloy has sufficient oxidation resistance so it may be possible to use it uncoated to temperatures approaching 675°C. The selection of the alloy by engine producers is described and the reasons for selecting are noted to be different from the original design criteria.

Danish Navy Experience With the KV-72 LM2500 CODOG Propulsion Plant

1983 ◽  
Author(s):  
Bent Hansen ◽  
Sloth Larsen ◽  
John W. Tenhundfeld
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Turbine Engines ◽  
Operational Experience ◽  
Gas Turbine Engines ◽  
Joint Effort ◽  
General Electric Company ◽  
Electric Company ◽  
Start Up ◽  
Selection Of

For more than twenty years the Royal Danish Navy (RDN) has been using gas turbine engines for propulsion of fast patrol vessels as well as frigates. This paper, which is the result of a joint effort by the Royal Danish Navy, Aalborg Vaerft Shipyard, and General Electric Company USA, describes how the propulsion system design was developed using previous RDN gas turbine system experience. A detailed description of the ship, the selection of machinery, and design of the propulsion configuration, including the LM2500 gas turbine module, is included. The three Royal Danish “KV-72” corvettes of the NIELS JUEL class have now been in operation for almost three years. Since the start-up of the NIELS JUEL machinery in November 1978 the CODOG propulsion plants aboard this class have accumulated more than 8,000 running hours, of which over 1,500 hours have been in the gas turbine or “sprint” drive mode. Operational experience with the GE LM2500 gas turbines is also described.

Evaporative Cooling of Gas Turbine Engines

2013 ◽  
Vol 135 (8) ◽  
Author(s):  
Mustapha Chaker ◽  
Cyrus B. Meher-Homji
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Low Cost ◽  
Evaporative Cooling ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
End User ◽  
Very High ◽  
Improve Reliability ◽  
Selection Of

There are numerous gas turbine applications in power generation and mechanical drive service where power drop during the periods of high ambient temperature has a very detrimental effect on the production of power or process throughput. Several geographical locations experience very high temperatures with low coincident relative humidities. In such cases media evaporative cooling can be effectively applied as a low cost power augmentation technique. Several misconceptions exist regarding their applicability to evaporative cooling, the most prevalent being that they can only be applied in extremely dry regions. This paper provides a detailed treatment of media evaporative cooling, discussing aspects that would be of value to an end user, including selection of climatic design points, constructional features of evaporative coolers, thermodynamic aspects of its effect on gas turbines, and approaches to improve reliability. It is hoped that this paper will be of value to plant designers, engineering companies, and operating companies that are considering the use of media evaporative cooling.

HAYNES WASPALOY

Alloy Digest ◽  
2000 ◽  
Vol 49 (3) ◽  
Keyword(s):  
Rupture Strength ◽  
Base Alloy ◽  
Stress Rupture ◽  
Heat Treating ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Temperature Performance ◽  
High Oxidation ◽  
High Oxidation Resistance ◽  
Nickel Base

Abstract Haynes Waspaloy is a specially vacuum melted, nickel-base alloy having outstanding tensile and stress-rupture strength up to 760 deg C (1400 deg F) combined with high oxidation resistance up to 871 deg C (1600 deg F). It is recommended for gas turbine engines, airframe assemblies, and missile systems. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as heat treating and machining. Filing Code: Ni-560. Producer or source: Haynes International Inc.

Evaporative Cooling of Gas Turbine Engines

2012 ◽  
Author(s):  
Mustapha Chaker ◽  
Cyrus B. Meher-Homji
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Low Cost ◽  
Evaporative Cooling ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
End User ◽  
Very High ◽  
Improve Reliability ◽  
Selection Of

There are numerous gas turbine applications in power generation and mechanical drive service where power drop during the periods of high ambient temperature has a very detrimental effect on the production of power or process throughput. Several geographical locations experience very high temperatures with low coincident relative humidities. In such cases media evaporative cooling can be effectively applied as a low cost power augmentation technique. Several misconceptions exist regarding their applicability of evaporative cooling the most prevalent being that they can only be applied in extremely dry regions. This paper provides a detailed treatment of media evaporative cooling, discussing aspects that would be of value to an end user including selection of climatic design points, constructional features of evaporative coolers, thermodynamic aspects of its effect on gas turbines and approaches to improve reliability. It is hoped that this paper will be of value to plant designers, engineering companies and operating companies that are considering the use of media evaporative cooling.

CRUCIBLE CG27

Alloy Digest ◽  
1969 ◽  
Vol 18 (1) ◽  
Keyword(s):  
High Temperature ◽  
Tensile Properties ◽  
Base Alloy ◽  
Stress Rupture ◽  
Heat Treating ◽  
High Temperature Stress ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Iron Nickel ◽  
Nickel Base

Abstract Crucible CG27 is a forgeable iron-nickel base alloy having an excellent combination of high temperature stress-rupture and tensile properties. It resists oxidation up to 1500 F and is recommended for gas turbine engines and turbine wheels. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-219. Producer or source: Crucible Materials Corporation.

Selection of a High-Efficiency Regenerator for Pipeline Gas Turbines

1977 ◽  
Author(s):  
K. O. Parker
Keyword(s):  
Gas Turbine ◽  
Thermal Efficiency ◽  
Gas Turbines ◽  
High Efficiency ◽  
Steel Plate ◽  
Hydrocarbon Fuel ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Cost Impact ◽  
Selection Of

The dramatically rising cost of hydrocarbon fuel in recent years has reemphasized industry attention to high thermal efficiency for its pipeline compressor drive gas turbine engines. The advent of a new stainless steel plate-fin industrial regenerator has made possible greatly improved gas turbine thermal efficiency, compact installation, and long life. The selection of the optimum match of regenerator effectiveness and pressure drop with engine characteristics is discussed together with the size and cost impact of these parameters. New design features are developed that ensure historical regenerator problems are handled effectively.

scholarly journals Borescope Photographic Techniques Developed for Marine Gas Turbine Engines

1975 ◽  
Author(s):  
W. Ridler
Keyword(s):  
Light Intensity ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
High Quality ◽  
Field Of Vision ◽  
Selection Of

This paper discusses photographic techniques developed for marine gas turbine engines. Of primary importance in borescope analysis and photography of marine gas turbines is the selection of the best equipment for the job. It is important that the user know his equipment and its range and limitations. There is no precedent for sacrificing light intensity, limited field of vision, or optical clarity. Once a borescope system has been selected, there are many other variables which must be considered in order to obtain high quality, clear and representative photographs.

WASPALOY

Alloy Digest ◽  
1967 ◽  
Vol 16 (11) ◽  
Keyword(s):  
Rupture Strength ◽  
Base Alloy ◽  
Stress Rupture ◽  
Heat Treating ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Union Carbide Corporation ◽  
High Oxidation ◽  
High Oxidation Resistance ◽  
Nickel Base

Abstract WASPALOY is a vacuum induction melted nickel-base alloy having outstanding tensil and stress-rupture strength up to 1400 F combined with high oxidation resistance up to 1600 F. It is recommended for gas turbine engines, airframe assemblies and missile systems. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness, creep, and fatigue. It also includes information on low and high temperature performance, and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-129. Producer or source: Union Carbide Corporation, Materials Systems Division.

PYROMET ALLOY CTX-1

Alloy Digest ◽  
1997 ◽  
Vol 46 (5) ◽  
Keyword(s):  
Coefficient Of Thermal Expansion ◽  
High Strength ◽  
Heat Treating ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Thermal Fatigue Resistance ◽  
Temperature Performance ◽  
Hot Work Die ◽  
Pressure Hydrogen ◽  
Hot Hardness

Abstract Pyromet CTX-1 is a high-strength, precipitation-hardenable superalloy exhibiting a low coefficient of thermal expansion and high strength up to about 1200 deg F. The alloy possesses high hot hardness and good thermal fatigue resistance. Its applications include components for gas turbine engines, hot-work die applications and high-pressure hydrogen environments. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: FE-56. Producer or source: Carpenter. Originally published February 1976, revised May 1997.

UDIMET 700

Alloy Digest ◽  
1987 ◽  
Vol 36 (1) ◽  
Keyword(s):  
Gas Turbines ◽  
Base Alloy ◽  
Heat Treating ◽  
Vacuum Arc ◽  
Vacuum Induction Melting ◽  
Induction Melting ◽  
Nickel Base Alloy ◽  
Vacuum Arc Remelting ◽  
Temperature Performance ◽  
Nickel Base

Abstract UDIMET 700 is a wrought nickel-base alloy produced by vacuum-induction melting and further refined by vacuum-arc remelting. It has excellent mechanical properties at high temperatures. Among its applications are blades for aircraft, marine and land-based gas turbines and rotor discs. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-51. Producer or source: Special Metals Corporation. Originally published March 1959, revised January 1987.

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