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Model Combustor to Assess the Oxidation Behavior of Ceramic Materials Under Real Engine Conditions PUBLIC ACCESS

[+] Author Affiliations
D. Filsinger, A. Schulz, S. Wittig

Universität Karlsruhe (TH), Germany

C. Taut

Siemens AG, Mülheim, Germany

H. Klemm

Fraunhofer-Institut für Keramische Technologien und Sinterwerkstoffe (IKTS), Dresden, Germany

G. Wötting

Ceramics for Industry CFI GmbH & Co. KG, Rödental, Germany

Paper No. 99-GT-349, pp. V004T02A013; 8 pages
doi:10.1115/99-GT-349
From:
  • ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award; General
  • Indianapolis, Indiana, USA, June 7–10, 1999
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7861-3
  • Copyright © 1999 by ASME

abstract

A further increase of thermal efficiency and a reduction of the exhaust emissions of ground based gas turbines can be achieved by introducing new high temperature resistant materials. Therfore, ceramics are under international development. They offer excellent strengths at room and elevated temperatures. For gas turbine combustor applications, however, these materials have to maintain their advantageous properties under hostile environment. For the assessment and comparison of the oxidation behavior of different nonoxide ceramic materials a test rig was developed at the Institute for Thermal Turbomachinery (ITS), University of Karlsruhe, Germany.

The test rig was integrated into the high temperature/ high pressure laboratory. A ceramic model combustion chamber was designed which allowed the exposure of standard four-point flexure specimens to the hot combustion gas flow. Gas temperatures and pressures could be varied in a wide range. Additionally, the partial steam pressure could be adjusted to real combustor conditions.

The present paper gives a detailed description of the test rig and presents results of 100 hours endurance tests of ceramic materials at 1400°C. The initial strengths and the strengths after oxidation tests are compared. In addition to this, photographs illustrating the changes of the material’s microstructure are presented.

Copyright © 1999 by ASME
This article is only available in the PDF format.

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