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Testing of felt-ceramic materials for combustor applications

Author
Roffe, G.
Published
Apr 1, 1983.
Physical Description
1 electronic document
Additional Creators
Venkat, R. S.
Online Version

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Unclassified, Unlimited, Publicly available.
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Summary
The feasibility of using composite felt ceramic materials as combustor liners was experimentally studied. The material consists of a porous felt pad sandwiched between a layer of ceramic and one of solid metal. Flat, rectangular test panels, which encompassed several design variations of the basic composite material, were tested, two at a time, in a premixed gas turbine combustor as sections of the combustor wall. Tests were conducted at combustor inlet conditions of 0.5 MPa and 533 K with a reference velocity of 25 m/s. The panels were subjected to a hot gas temperature of 2170 K with 1% of the total airflow used to film cool the ceramic surface of the test panel. In general, thin ceramic layers yield low ceramic stress levels with high felt ceramic interface temperatures. On the other hand, thick ceramic layers result in low felt ceramic interface temperatures but high ceramic stress levels. Extensive thermal cycling appears to cause material degradation, but for a limited number of cycles, the survivability of felt ceramic materials, even under extremely severe combustor operating conditions, was conclusively demonstrated.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19830018566.
Accession ID: 83N26837.
NASA-CR-168103.
AD-A130069.
NAS 1.26:168103.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15712393