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RESEARCH PAPERS: Gas Turbines: Ceramics

Nondestructive Characterization of Ceramic Composites Used as Combustor Liners in Advanced Gas Turbines

[+] Author and Article Information
W. A. Ellingson, S. A. Rothermel

Energy Technology Division, Argonne National Laboratory, Argonne, IL 60439-4838

J. F. Simpson

Solar Turbines, Inc., San Diego, CA 92186-5376

J. Eng. Gas Turbines Power 118(3), 486-490 (Jul 01, 1996) (5 pages) doi:10.1115/1.2816672 History: Received March 16, 1995; Online November 19, 2007

Abstract

Nondestructive characterization (NDC) methods, which can provide full-field information about components prior to and during use, are critical to the reliable application of continuous fiber ceramic matrix composites in high-firing-temperature (>1350°C) gas turbines. [For combustor liners, although they are nonmechanical load-bearing components, both thermal characteristics and mechanical integrity are vitally important.] NDC methods being developed to provide necessary information include x-ray computed tomography (mainly for through-wall density and delamination detection), infrared-based thermal diffusivity imaging, and single-wall through-transmission x-ray imaging (mainly for fiber content and alignment detection). Correlation of the data obtained from NDC methods with subscale combustor liner tests have shown positive results at thermal cycling temperatures from 700°C to 1177°C.

Copyright © 1996 by The American Society of Mechanical Engineers
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