Turbomachine Interface Sealing

TITLE AND SUBTITLE:
Turbomachine Interface Sealing

AUTHOR(S):
Robert C. Hendricks, Raymond E. Chupp, Scott B. Lattime, and Bruce M. Steinetz

REPORT DATE:
April 2005

FUNDING NUMBERS:
Cost Center 2250000013

PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration
John H. Glenn Research Center at Lewis Field
Cleveland, Ohio 44135-3191

PERFORMING ORGANIZATION REPORT NUMBER:
E-15116

SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration
Washington, DC 20546-0001

REPORT TYPE AND DATES COVERED:
Technical Memorandum

SPONSORING/MONITORING AGENCY REPORT NUMBER:
NASA TM-2005-213633

SUPPLEMENTARY NOTES:
Prepared for the International Conference on Metallurgical Coatings and Thin Films sponsored by the AVS Science & Technology, San Diego, California, May 2-6, 2005. Robert C. Hendricks and Bruce M. Steinetz, NASA Glenn Research Center; Raymond E. Chupp, General-Electric Global Research Center, Niskayuna, New York 12309; and Scott B. Lattime, University of Akron, 302 Buchtel Mall, Akron, Ohio 44325 and NASA Resident Research Associate at Glenn Research Center. Responsible person, Robert C. Hendricks, organization code R, 216-977-7507.

ABSTRACT:
Sealing interfaces and coatings, like lubricants, are sacrificial, giving up their integrity for the benefit of the component. Clearance control is a major issue in power systems turbomachine design and operational life. Sealing becomes the most cost-effective way to enhance system performance. Coatings, films, and combined use of both metals and ceramics play a major role in maintaining interface clearances in turbomachine sealing and component life. This paper focuses on conventional and innovative materials and design practices for sealing interfaces.

SUBJECT TERMS:
Turbomachines; Seals; Materials; Plasma spray; Shroud

NUMBER OF PAGES:
26

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