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Ceramic Micro Channel Recuperator Fabrication Methods for Small Gas Turbine Engines

[+] Author Affiliations
Matthew M. Kelly, Ming-Jen Pan, Michael J. Vick

U.S. Naval Research Laboratory, Washington, DC

Sundar Atre

Oregon State University, Corvallis, OR

Gregory Rancourt

Starkey Aerospace Corporation, Boulder, CO

Andrew Heyes

Imperial College London, London, UK

Paper No. GT2012-68510, pp. 581-587; 7 pages
doi:10.1115/GT2012-68510
From:
  • ASME Turbo Expo 2012: Turbine Technical Conference and Exposition
  • Volume 5: Manufacturing Materials and Metallurgy; Marine; Microturbines and Small Turbomachinery; Supercritical CO2 Power Cycles
  • Copenhagen, Denmark, June 11–15, 2012
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4471-7
  • Copyright © 2012 by ASME

abstract

Recuperators can greatly improve the fuel efficiency of gas turbine engines, but they are normally heavy, bulky, expensive, and susceptible to high temperature creep, oxidation, and thermal stresses. One way to alleviate these problems is to make them from ceramic materials rather than metal alloys. However, fabricating these complex structures is a challenge. The technique investigated in this study was to laser-cut thin sheets of tapecast material into complex patterns, laminate them together into stacks, and sinter at high temperature. The layers were laminated together by applying heat, pressure, chemical solvents, and varying combinations of the three. This paper presents the results of all fabrication tests, describes the method used to successfully laminate and sinter one 33-layer stack, and summarizes other possible fabrication techniques for future investigation that would facilitate lamination the process.

Copyright © 2012 by ASME

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