Stiffness of Straight and Tapered Annular Gas Path Seals

[+] Author and Article Information
David P. Fleming

National Aeronautics and Space Administration, Lewis Research Center, Cleveland, Ohio 44135

J. of Lubrication Tech 101(3), 349-354 (Jul 01, 1979) (6 pages) doi:10.1115/1.3453371 History: Received March 20, 1978; Revised June 13, 1978; Online October 20, 2010


Radial stiffness of annular (ring-type) gas path seals is calculated for both constant-clearance designs and tapered designs for which the inlet clearance is larger than the outlet clearance. Under some conditions a constant-clearance seal can have a negative stiffness; this undesirable property can be completely eliminated by use of tapered seals. Leakage rates are only moderately higher in tapered seals.

Copyright © 1979 by ASME
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