Design of fiber optical high temperature sensors for gas turbine monitoring

2009 ◽  
Author(s):  
M. Willsch ◽  
T. Bosselmann ◽  
P. Flohr ◽  
R. Kull ◽  
W. Ecke ◽  
...  
Keyword(s):  
High Temperature ◽  
Gas Turbine ◽  
Temperature Sensors ◽  
Fiber Optical

High-Temperature, High-Bandwidth Fiber Optic Pressure and Temperature Sensors for Gas Turbine Applications

2004 ◽  
Author(s):  
Robert Fielder ◽  
Matthew Palmer ◽  
Wing Ng ◽  
Matthew Davis ◽  
Aditya Ringshia
Keyword(s):  
High Temperature ◽  
Gas Turbine ◽  
Fiber Optic ◽  
Temperature Sensors ◽  
High Bandwidth

Failure Mechanisms of Fiber Optic Temperature Sensors in High Temperature and Vibration Environments

MRS Advances ◽  
2016 ◽  
Vol 1 (35) ◽  
pp. 2427-2437
Author(s):  
Loucas Tsakalakos ◽  
Uttara A. Dani ◽  
Boon K. Lee ◽  
Susanne M. Lee ◽  
Sudeep Mandal ◽  
...  
Keyword(s):  
High Temperature ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Failure Modes ◽  
Fiber Optic ◽  
Failure Mechanisms ◽  
Temperature Sensors ◽  
Fiber Optic Probe ◽  
Silica Fibers ◽  
Fiber Optic Temperature

ABSTRACTFiber optic temperature sensors are used in a variety of harsh environment applications. We have explored use of such temperature sensors in commercial gas turbines to measure the temperature at various regions of interest within the turbine system. More specifically, fiber optic temperature rakes were designed and installed on a commercial gas turbine under full load conditions. This work will focus on failure mechanisms observed at multiple length scales that impact the performance of high temperature optical fiber sensors. It was found that Au-coated silica fibers, which are a standard in the industry, undergo various failure modes when subjected to combinations of high temperature and high vibration. More specifically, the Au coating became soft/ductile as the temperature is increased. We also observed that the Au coating was not well bonded to the silica fiber, as expected since there were no adhesion layers present. These effects led to significant damage of the fiber optic under high vibrations. We also found that vibrations from the gas turbine coupled into fundamental modes of the fiber optic probe assembly, which were analyzed by detailed dynamic mechanical analysis. This led to the fiber impacting the internal wall of the probe assembly, which caused further damage and failure of the fiber and the Au coating. The silica fibers returned from the field also exhibited significant twisting throughout most of their length. This suggests the fibers reached temperatures above their strain point (about 1000 C for pure silica glass), which is explained by either a) the strain point had been significantly reduced by the presence of the Ge dopant, or b) the temperature was higher than expected in the gas turbine exhaust region. It was also hypothesized that complex anelastic effects may play a role under the high temperature, high vibration environment experienced by the probes. Detailed structural analysis of the fiber optic temperature sensors by scanning electron microscopy, ToF-SIMS, and X-ray microscopy will be presented to corroborate the above simulations and proposed damage mechanisms. Finally, we note that the fiber Bragg gratings (FBG) present within the temperature probes provided promising temperature data, and were in fact not damaged/erased by the high temperature environment.

Application of fiber optic high temperature sensors for structural monitoring of structures submitted to fire

2014 ◽  
Vol 102 (7) ◽  
pp. 2932-2938 ◽  
Author(s):  
Paula Rinaudo ◽  
Benjamín Torres Górriz ◽  
David Barrera Villar ◽  
Ignacio Payá Zaforteza ◽  
Pedro Calderon Garcia ◽  
...  
Keyword(s):  
High Temperature ◽  
Fiber Optic ◽  
Temperature Sensors ◽  
Structural Monitoring

UDIMET L-605

Alloy Digest ◽  
2004 ◽  
Vol 53 (12) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Gas Turbine ◽  
Oxidation Resistance ◽  
Turbine Blades ◽  
Heat Treating ◽  
Gas Turbine Blades ◽  
Temperature Performance

Abstract Udimet L-605 is a high-temperature aerospace alloy with excellent strength and oxidation resistance. It is used in applications such as gas turbine blades and combustion area parts. This datasheet provides information on composition, physical properties, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, and joining. Filing Code: CO-109. Producer or source: Special Metals Corporation.

CM-R 411

Alloy Digest ◽  
1967 ◽  
Vol 16 (9) ◽  
Keyword(s):  
Shear Strength ◽  
High Temperature ◽  
Gas Turbine ◽  
Precipitation Hardening ◽  
Base Alloy ◽  
Heat Treating ◽  
Nickel Base Alloy ◽  
Jet Engine ◽  
Temperature Performance ◽  
Nickel Base

Abstract CM-R41 is a vacuum-melted, precipitation hardening nickel-base alloy possessing outstanding properties in the temperature range of 1200 F to 1800 F. It is recommended for jet engine and gas turbine components operating at high temperatures. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and shear strength as well as creep. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: Ni-127. Producer or source: Cannon-Muskegon Corporation.

CARPENTER M-252

Alloy Digest ◽  
1973 ◽  
Vol 22 (9) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Gas Turbine ◽  
Base Alloy ◽  
Heat Treating ◽  
Nickel Base Alloy ◽  
Jet Engine ◽  
Temperature Performance ◽  
Nickel Base

Abstract CARPENTER M-252 is an age-hardenable nickel-base alloy designed for highly stressed parts operating at temperatures up to 1600 F. Its prime application is for jet-engine and gas-turbine buckets. 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: Ni-195. Producer or source: Carpenter.

CMN-155

Alloy Digest ◽  
1968 ◽  
Vol 17 (8) ◽  
Keyword(s):  
High Temperature ◽  
Heat Resistance ◽  
Physical Properties ◽  
Gas Turbine ◽  
Base Alloy ◽  
Heat Treating ◽  
Jet Engine ◽  
Iron Base Alloy ◽  
Temperature Performance ◽  
High Oxidation

Abstract CMN-155 is an austenitic iron-base alloy having high oxidation and heat resistance combined with good high temperature properties. It is recommended for jet engine and gas turbine components, high temperature fasteners, and rocket chambers. 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 as well as forming, heat treating, machining, and joining. Filing Code: SS-212. Producer or source: Cannon-Muskegon Corporation.

TIMETAL 551

Alloy Digest ◽  
2006 ◽  
Vol 55 (5) ◽  
Keyword(s):  
Shear Strength ◽  
High Temperature ◽  
Physical Properties ◽  
Gas Turbine ◽  
Heat Treating ◽  
Nominal Composition ◽  
Turbine Engine ◽  
Temperature Performance ◽  
Beta Alloy ◽  
Alpha Beta

Abstract Timetal 551 is an improved-strength version of Timetal 550 alloy that retains good forging characteristics. The alpha-beta alloy has a nominal composition of Ti-4Al-4Mo-4Sn-0.5 Si, and it is used in gas turbine engine parts. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and shear strength as well as creep. It also includes information on high temperature performance as well as forming and heat treating. Filing Code: TI-138. Producer or source: Timet.

Brittle Materials Design, High Temperature Gas Turbine

1975 ◽  
Author(s):  
Arthur F. McLean ◽  
Eugene A. Fisher ◽  
Raymond J. Bratton ◽  
Donald G. Miller
Keyword(s):  
High Temperature ◽  
Gas Turbine ◽  
Brittle Materials ◽  
Materials Design ◽  
High Temperature Gas
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