numerical, analytical, experimental study of fluid dynamic
TRANSCRIPT
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Wilbur ShapiroMechanical Technology, Inc., Latham, New York
Numerical, Analytical, Experimental Studyof Fluid Dynamic Forces in SealsVolume 2—Description of Gas Seal Codes GCYLT and GFACE
NASA/CR—2004-213199/VOL2
October 2004
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The NASA STI Program Office . . . in Profile
Since its founding, NASA has been dedicated tothe advancement of aeronautics and spacescience. The NASA Scientific and TechnicalInformation (STI) Program Office plays a key partin helping NASA maintain this important role.
The NASA STI Program Office is operated byLangley Research Center, the Lead Center forNASA’s scientific and technical information. TheNASA STI Program Office provides access to theNASA STI Database, the largest collection ofaeronautical and space science STI in the world.The Program Office is also NASA’s institutionalmechanism for disseminating the results of itsresearch and development activities. These resultsare published by NASA in the NASA STI ReportSeries, which includes the following report types:
• TECHNICAL PUBLICATION. Reports ofcompleted research or a major significantphase of research that present the results ofNASA programs and include extensive dataor theoretical analysis. Includes compilationsof significant scientific and technical data andinformation deemed to be of continuingreference value. NASA’s counterpart of peer-reviewed formal professional papers buthas less stringent limitations on manuscriptlength and extent of graphic presentations.
• TECHNICAL MEMORANDUM. Scientificand technical findings that are preliminary orof specialized interest, e.g., quick releasereports, working papers, and bibliographiesthat contain minimal annotation. Does notcontain extensive analysis.
• CONTRACTOR REPORT. Scientific andtechnical findings by NASA-sponsoredcontractors and grantees.
• CONFERENCE PUBLICATION. Collectedpapers from scientific and technicalconferences, symposia, seminars, or othermeetings sponsored or cosponsored byNASA.
• SPECIAL PUBLICATION. Scientific,technical, or historical information fromNASA programs, projects, and missions,often concerned with subjects havingsubstantial public interest.
• TECHNICAL TRANSLATION. English-language translations of foreign scientificand technical material pertinent to NASA’smission.
Specialized services that complement the STIProgram Office’s diverse offerings includecreating custom thesauri, building customizeddatabases, organizing and publishing researchresults . . . even providing videos.
For more information about the NASA STIProgram Office, see the following:
• Access the NASA STI Program Home Pageat http://www.sti.nasa.gov
• E-mail your question via the Internet [email protected]
• Fax your question to the NASA AccessHelp Desk at 301–621–0134
• Telephone the NASA Access Help Desk at301–621–0390
• Write to: NASA Access Help Desk NASA Center for AeroSpace Information 7121 Standard Drive Hanover, MD 21076
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Wilbur ShapiroMechanical Technology, Inc., Latham, New York
Numerical, Analytical, Experimental Studyof Fluid Dynamic Forces in SealsVolume 2—Description of Gas Seal Codes GCYLT and GFACE
NASA/CR—2004-213199/VOL2
October 2004
National Aeronautics andSpace Administration
Glenn Research Center
Prepared under Contract NAS3–25644
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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
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134
Numerical, Analytical, Experimental Study of Fluid Dynamic Forces in SealsVolume 2—Description of Gas Seal Codes GCYLT and GFACE
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 code 2200,216–977–7439. Responsible person, Robert C. Hendricks, Research and Technology Directorate, NASA GlennResearch 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. Animplicit multidomain capability allow the division of complex flow domains to allow optimum use of computationalcells. SCISEAL also has the unique capability to produce cross-coupled stiffness and damping coefficients forrotordynamic computations. The industrial codes consist of a series of separate stand-alone modules designed forexpeditious parametric analyses and optimization of a wide variety of cylindrical and face seals. Coupled through aKnowledge-Based System (KBS) that provides a user-friendly Graphical User Interface (GUI), the industrial codes arePC based using an OS/2 operating system. These codes were designed to treat film seals where a clearance existsbetween the rotating and stationary components. Leakage is inhibited by surface roughness, small but stiff clearancefilms, and viscous pumping devices. The codes have demonstrated to be a valuable resource for seal development offuture air-breathing and space propulsion engines.
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