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The ssme seal test program: leakage tests for helically-grooved seals
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Childs, D. W. |
| Copyright Year | 1983 |
| Description | Helically grooved annular seal configurations were tested in highly turbulent flow to determine if reduced leakage and enhanced stability would result from the pumping action of the seal. It was found that: (1) leakage of a helically grooved seals decreases with running speed; (2) leakage reduction due to increased running speed is greater at lower values of R sub a; (3) an asymptote for leakage reduction is indicated with increasing running speed; (4) leakage is reduced by reducing the ridge (minimum) and average clearances; (5) leakage increases with increasing pitch angles and with increasing groove depth. Plain seals with smooth rotors and stators will leak more than a helically grooved seal. It was also found that plain seals with a rough rotor and a rough stator leak less than a properly designed helically grooved seal. A properly designed helically grooved seal consumes at least twice as much power as a conventional annular seal. |
| File Size | 4447180 |
| Page Count | 96 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19840004427 |
| Archival Resource Key | ark:/13960/t7np6ws96 |
| Language | English |
| Publisher Date | 1983-11-01 |
| Access Restriction | Open |
| Subject Keyword | Mechanical Engineering Leakage High Reynolds Number Static Pressure Energy Consumption Seals Stoppers Turbulent Flow Space Shuttle Main Engine Performance Prediction Pressure Distribution Rotor Speed Grooves Annuli Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
