NOTE: This item is not available outside the Texas A&M University network. Texas A&M affiliated users who are off campus can access the item through NetID and password authentication or by using TAMU VPN. Non-affiliated individuals should request a copy through their local library's interlibrary loan service.
Understanding the friction factor behavior in liquid annular seals with deliberately roughened surfaces, a CFD approach
dc.creator | Villasmil Urdaneta, Larry Alfonso | |
dc.date.accessioned | 2012-06-07T23:19:15Z | |
dc.date.available | 2012-06-07T23:19:15Z | |
dc.date.created | 2002 | |
dc.date.issued | 2002 | |
dc.identifier.uri | https://hdl.handle.net/1969.1/ETD-TAMU-2002-THESIS-V49 | |
dc.description | Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to digital@library.tamu.edu, referencing the URI of the item. | en |
dc.description | Includes bibliographical references (leaves 68-69). | en |
dc.description | Issued also on microfiche from Lange Micrographics. | en |
dc.description.abstract | Bulk flow theory has been widely used to estimate annular seals dynamic coefficients. To predict the flow behavior through the seal, this theory relies on empirical friction factor correlations based on pipe data. Several experiments have gathered seals performance and leakage information indicating that friction factor increases as the seal clearance is increased, contradicting the theory predictions based on Moody's pipe-friction model. A Computational Fluid Dynamics (CFD) code is used to simulate the fluid motion over surfaces with particular roughness patterns. Flat plate experimental tests showing such friction factor vs. clearance behavior were numerically modeled. It was consistently found that the higher friction factor characteristics of these deliberately roughened surfaces are governed by the roughness ability to develop a high static pressure in the trailing face of each roughness cavity. Wall shear stresses play a secondary role. | en |
dc.format.medium | electronic | en |
dc.format.mimetype | application/pdf | |
dc.language.iso | en_US | |
dc.publisher | Texas A&M University | |
dc.rights | This thesis was part of a retrospective digitization project authorized by the Texas A&M University Libraries in 2008. Copyright remains vested with the author(s). It is the user's responsibility to secure permission from the copyright holder(s) for re-use of the work beyond the provision of Fair Use. | en |
dc.subject | mechanical engineering. | en |
dc.subject | Major mechanical engineering. | en |
dc.title | Understanding the friction factor behavior in liquid annular seals with deliberately roughened surfaces, a CFD approach | en |
dc.type | Thesis | en |
thesis.degree.discipline | mechanical engineering | en |
thesis.degree.name | M.S. | en |
thesis.degree.level | Masters | en |
dc.type.genre | thesis | en |
dc.type.material | text | en |
dc.format.digitalOrigin | reformatted digital | en |
Files in this item
This item appears in the following Collection(s)
-
Digitized Theses and Dissertations (1922–2004)
Texas A&M University Theses and Dissertations (1922–2004)
Request Open Access
This item and its contents are restricted. If this is your thesis or dissertation, you can make it open-access. This will allow all visitors to view the contents of the thesis.