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Jed Walowit and Wilbur ShapiroMechanical Technology, Inc., Latham, New York
Numerical, Analytical, Experimental Studyof Fluid Dynamic Forces in SealsVolume 3—Description of Spiral-Groove Codes SPIRALGand SPIRALI
NASA/CR—2004-213199/VOL3
October 2004
https://ntrs.nasa.gov/search.jsp?R=20040182340 2018-05-24T02:30:57+00:00Z
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Jed Walowit and Wilbur ShapiroMechanical Technology, Inc., Latham, New York
Numerical, Analytical, Experimental Studyof Fluid Dynamic Forces in SealsVolume 3—Description of Spiral-Groove Codes SPIRALGand SPIRALI
NASA/CR—2004-213199/VOL3
October 2004
National Aeronautics andSpace Administration
Glenn Research Center
Prepared under Contract NAS3–25644
Available from
NASA Center for Aerospace Information7121 Standard DriveHanover, MD 21076
National Technical Information Service5285 Port Royal RoadSpringfield, VA 22100
Available electronically at http://gltrs.grc.nasa.gov
This publication is available from the NASA Center for AeroSpace Information, 301–621–0390.
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Numerical, Analytical, Experimental Study of Fluid Dynamic Forces in SealsVolume 3—Description of Spiral-Groove Codes SPIRALG and SPIRALI
Jed Walowit and Wilbur Shapiro
CFD seal code; Industrial seal codes; User-friendly seal codes; Fluid-film seal codes;Clearance seal codes; Seals; Dynamics; Design; Computational analysis; Fluid forces
Unclassified -UnlimitedSubject Categories: 07, 20, and 34 Distribution: Nonstandard
Mechanical Technology, Inc. (MTI)968 Albany-Shaker RoadLatham, New York 12110
Project Manager, Anita D. Liang, Aeronautics Directorate, NASA Glenn Research Center, organization code2200, 216–977–7439. Responsible person, Robert C. Hendricks, Research and Technology Directorate, NASAGlenn Research Center, organization code 5000, 216–977–7507.
The objectives of the program were to develop computational fluid dynamics (CFD) codes and simpler industrial codesfor analyzing and designing advanced seals for air-breathing and space propulsion engines. The CFD code SCISEAL iscapable of producing full three-dimensional flow field information for a variety of cylindrical configurations. An implicitmultidomain capability allow the division of complex flow domains to allow optimum use of computational cells.SCISEAL also has the unique capability to produce cross-coupled stiffness and damping coefficients for rotordynamiccomputations. The industrial codes consist of a series of separate stand-alone modules designed for expeditious paramet-ric analyses and optimization of a wide variety of cylindrical and face seals. Coupled through a Knowledge-BasedSystem (KBS) that provides a user-friendly Graphical User Interface (GUI), the industrial codes are PC based using anOS/2 operating system. These codes were designed to treat film seals where a clearance exists between the rotating andstationary components. Leakage is inhibited by surface roughness, small but stiff clearance films, and viscous pumpingdevices. The codes have demonstrated to be a valuable resource for seal development of future air-breathing and spacepropulsion engines.
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