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Brush seal arrangement for the rs-68 turbopump set
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Ransom, D. Prueger, G. Nunez, D. |
| Copyright Year | 2006 |
| Description | The nature of the RS-68 turbopumps requires that the hydrogen seals separating the pump from the turbine must have extremely low levels of leakage and be contained in small packages. Conventional seal technologies are not able to reasonably satisfy such design requirements. A review of experimental measurements and analysis publications suggests that brush seals are well suited for the design requirements. Brush seals are shown to have less leakage than conventional labyrinth and damper seals and have no adverse effects on the rotordynamics of the machine. The bulk-flow analysis presented by Hendricks et al. is used as a guideline to create a spreadsheet that provides mass flow through the seal and heat generated by the rubbing contact of the bristles on the shaft. The analysis is anchored to published data for LN2 and LH2 leakage tests. Finally, the analysis is used to design seals for both applications. It is observed that the most important analysis parameter is the thickness of the bristle pack and its relationship to seal clearance, lay angle and pressure drop. |
| File Size | 1501213 |
| Page Count | 32 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20080003797 |
| Archival Resource Key | ark:/13960/t6vx5b715 |
| Language | English |
| Publisher Date | 2006-08-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Propulsion And Power Leakage Rotor Dynamics Turbine Pumps Clearances Liquid Hydrogen Mass Flow Brush Seals Labyrinth Seals Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
