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Wear of seal materials used in aircraft propulsion systems
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Ludwig, L. P. Bill, R. C. |
| Copyright Year | 1978 |
| Description | The various types of seal locations in a gas turbine engine are described, and the significance of wear to each type is reviewed. Starting with positive contact shaft seals, existing material selection guidelines are reviewed, and the existing PV (contact pressure X sliding velocity) criteria for selecting seal materials are discussed, along with the theoretical background for these criteria. Examples of wear mechanisms observed to operate in positive contact seals are shown. Design features that can extend the operating capabilities of positive contact seals, including pressure balancing and incorporation of hydrodynamic lift are briefly discussed. It is concluded that, despite the benefits arising from these design features, improved positive contact seal materials from the standpoint of wear, erosion and oxidation resistance will be necessary for further improvements in seal performance and durability, and to meet stringent future challenges. |
| File Size | 5406969 |
| Page Count | 30 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19790004033 |
| Archival Resource Key | ark:/13960/t3324r560 |
| Language | English |
| Publisher Date | 1978-01-01 |
| Access Restriction | Open |
| Subject Keyword | Metallic Materials Blade Tips Seals Stoppers Gas Turbines Wear Labyrinth Aircraft Parts Propulsion System Configurations Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
