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Brush seal leakage performance with gaseous working fluids at static and low rotor speed conditionsThe leakage performance of a brush seal with gaseous working fluids at static and low rotor speed conditions was studied. The leakage results included for air, helium, and carbon dioxide at several bristle/rotor interferences. Also, the effects of packing a lubricant into the bristles and also of reversing the pressure drop across the seal were studied. Results were compared to that of an annular seal at similar operating conditions. In order to generalize the results, they were correlated using corresponding state theory. The brush seal tested had a bore diameter of 3.792 cm (1.4930 in.), a fence height of 0.0635 cm (0.025 in.), and 1800 bristles/cm circumference (4500 bristles/in. circumference). Various bristle/rotor radial interferences were achieved by using a tapered rotor. The brush seal reduced the leakage in comparison to the annular seal, up to 9.5 times. Reversing the pressure drop across the brush seal produced leakage rates approximately the same as that of the annular seal. Addition of a lubricant reduced the leakage by 2.5 times. The air and carbon dioxide data were successfully correlated using corresponding state theory. However, the helium data followed a different curve than the air and carbon dioxide data.
Document ID
19930035497
Document Type
Conference Paper
Authors
Carlile, Julie A. (NASA Lewis Research Center Cleveland, OH, United States)
Hendricks, Robert C. (NASA Lewis Research Center Cleveland, OH, United States)
Yoder, Dennis A. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 15, 2013
Publication Date
June 1, 1992
Subject Category
MECHANICAL ENGINEERING
Report/Patent Number
ASME PAPER 92-GT-304
Meeting Information
ASME, International Gas Turbine and Aeroengine Congress and Exposition(Cologne)
Distribution Limits
Public
Copyright
Other