NASA Logo

NTRS - NASA Technical Reports Server

Back to Results
The SSME seal test program: Leakage tests for helically-grooved sealsHelically 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.
Document ID
19840004427
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Childs, D. W. (Texas A&M Univ. College Station, TX, United States)
Date Acquired
September 4, 2013
Publication Date
November 1, 1983
Subject Category
Mechanical Engineering
Report/Patent Number
NASA-CR-170921
SEAL-3-83
NAS 1.26:170921
Report Number: NASA-CR-170921
Report Number: SEAL-3-83
Report Number: NAS 1.26:170921
Accession Number
84N12495
Funding Number(s)
CONTRACT_GRANT: NAS8-33716
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available