Bidirectional Brush Seals

TITLE AND SUBTITLE:
Bidirectional Brush Seals

AUTHOR(S):
Robert C. Hendricks, Jack Wilson, Tom Wu, and Ralph Flower

REPORT DATE:
January 1997

FUNDING NUMBERS:
WU-233-1B-1B

PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration
Lewis Research Center
Cleveland, Ohio 44135-3191

PERFORMING ORGANIZATION REPORT NUMBER:
E-10519

SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration
Washington, DC 20546-0001

REPORT TYPE AND DATES COVERED:
Technical Memorandum

SPONSORING/MONITORING AGENCY REPORT NUMBER:
NASA TM-107351

SUPPLEMENTARY NOTES:
Prepared for the Turbo Expo '97 sponsored by the American Society of Mechanical Engineers, Orlando, Florida, June 2-5, 1997. Robert C. Hendricks, NASA Lewis Research Center; Jack Wilson, 2001 Aerospace Parkway, Brook Park, Ohio 44142 (work performed under NASA Contract NAS3-27186); Tom Wu, NASA Lewis Research Center; Ralph Flower, Cross Manufacturing, Ltd., Devizes, England. Responsible person, Robert C. Hendricks, organization code 5000,
(216) 977-7507.

ABSTRACT:
A study of flow rate and pressure drop through a set of I.D./O.D. bidirectional brush seals is presented for both bench testing and wave rotor rig testing. Data indicate the use of brush seals enhanced performance from 3% to 12% depending on leakages; at low leakages, the relative performance is similar to that for close clearance cylindrical seals; however, at higher relative leakage rates the performance increases to 12% were noted. These brush seals are capable of sealing positive or negative pressure drops with respect to the axial direction.

SUBJECT TERMS:
Brush seals; Wave rotor; Tribology

NUMBER OF PAGES:
11

PDF AVAILABLE FROM URL:
1997/TM-107351.pdf
(346,446 KB)
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