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Title: Advanced high temperature static strain sensor development. Final report

Abstract

An examination was made into various techniques to be used to measure static strain in gas turbine liners at temperatures up to 1150 K (1600 F). The methods evaluated included thin film and wire resistive devices, optical fibers, surface acoustic waves, the laser speckle technique with a heterodyne readout, optical surface image and reflective approaches and capacitive devices. A preliminary experimental program to develop a thin film capacitive device was dropped because calculations showed that it would be too sensitive to thermal gradients. In a final evaluation program, the laser speckle technique appeared to work well up to 1150 K when it was used through a relatively stagnant air path. The surface guided acoustic wave approach appeared to be interesting but to require too much development effort for the funds available. Efforts to develop a FeCrAl resistive strain gage system were only partially successful and this part of the effort was finally reduced to a characterization study of the properties of the 25 micron diameter FeCrAl (Kanthal A-1) wire. It was concluded that this particular alloy was not suitable for use as the resistive element in a strain gage above about 1000 K.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
United Technologies Research Center, East Hartford, CT (USA)
OSTI Identifier:
6037165
Report Number(s):
N-87-25552; NASA-CR-179520; NAS-1.26:179520; R-86-995875-28
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 47 OTHER INSTRUMENTATION; GAS TURBINE ENGINES; STRAIN GAGES; PERFORMANCE TESTING; CAPACITANCE; EXPERIMENTAL DATA; HIGH TEMPERATURE; OPTICAL EQUIPMENT; DATA; ELECTRICAL PROPERTIES; ENGINES; EQUIPMENT; HEAT ENGINES; INFORMATION; INTERNAL COMBUSTION ENGINES; MEASURING INSTRUMENTS; NUMERICAL DATA; PHYSICAL PROPERTIES; TESTING; 421000* - Engineering- Combustion Systems; 440300 - Miscellaneous Instruments- (-1989)

Citation Formats

Hulse, C O, Stetson, K A, Grant, H P, Jameikis, S M, Morey, W W, Raymondo, P, Grudkowski, T W, and Bailey, R S. Advanced high temperature static strain sensor development. Final report. United States: N. p., 1986. Web.
Hulse, C O, Stetson, K A, Grant, H P, Jameikis, S M, Morey, W W, Raymondo, P, Grudkowski, T W, & Bailey, R S. Advanced high temperature static strain sensor development. Final report. United States.
Hulse, C O, Stetson, K A, Grant, H P, Jameikis, S M, Morey, W W, Raymondo, P, Grudkowski, T W, and Bailey, R S. Fri . "Advanced high temperature static strain sensor development. Final report". United States.
@article{osti_6037165,
title = {Advanced high temperature static strain sensor development. Final report},
author = {Hulse, C O and Stetson, K A and Grant, H P and Jameikis, S M and Morey, W W and Raymondo, P and Grudkowski, T W and Bailey, R S},
abstractNote = {An examination was made into various techniques to be used to measure static strain in gas turbine liners at temperatures up to 1150 K (1600 F). The methods evaluated included thin film and wire resistive devices, optical fibers, surface acoustic waves, the laser speckle technique with a heterodyne readout, optical surface image and reflective approaches and capacitive devices. A preliminary experimental program to develop a thin film capacitive device was dropped because calculations showed that it would be too sensitive to thermal gradients. In a final evaluation program, the laser speckle technique appeared to work well up to 1150 K when it was used through a relatively stagnant air path. The surface guided acoustic wave approach appeared to be interesting but to require too much development effort for the funds available. Efforts to develop a FeCrAl resistive strain gage system were only partially successful and this part of the effort was finally reduced to a characterization study of the properties of the 25 micron diameter FeCrAl (Kanthal A-1) wire. It was concluded that this particular alloy was not suitable for use as the resistive element in a strain gage above about 1000 K.},
doi = {},
url = {https://www.osti.gov/biblio/6037165}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {8}
}

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