A relatively simple theory is presented that can be used to model the flow and pressure distribution in a brush seal matrix. The model assumes laminar, compressible, isothermal flow and requires knowledge of an empirical constant: the seal porosity value. Measurements of the mass flow rate together with radial and axial distributions of pressure were taken on a nonrotating experimental rig. These were obtained using a 122 mm bore brush seal with 0.25 mm radial interference. The experimental data are used to estimate the seal porosity. Measurements of the pressure distributions along the backing ring and under the bristle tips and discussed. Predicted mass flows are compared with those actually measured and there is reasonable agreement considering the limitations of the model.
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April 1993
Research Papers
A Combined Experimental and Theoretical Study of Flow and Pressure Distributions in a Brush Seal
F. J. Bayley,
F. J. Bayley
Thermo-Fluid Mechanics Research Centre, School of Engineering, University of Sussex, Brighton, BN1 9QT, Sussex, United Kingdom
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C. A. Long
C. A. Long
Thermo-Fluid Mechanics Research Centre, School of Engineering, University of Sussex, Brighton, BN1 9QT, Sussex, United Kingdom
Search for other works by this author on:
F. J. Bayley
Thermo-Fluid Mechanics Research Centre, School of Engineering, University of Sussex, Brighton, BN1 9QT, Sussex, United Kingdom
C. A. Long
Thermo-Fluid Mechanics Research Centre, School of Engineering, University of Sussex, Brighton, BN1 9QT, Sussex, United Kingdom
J. Eng. Gas Turbines Power. Apr 1993, 115(2): 404-410 (7 pages)
Published Online: April 1, 1993
Article history
Received:
February 24, 1992
Online:
April 24, 2008
Citation
Bayley, F. J., and Long, C. A. (April 1, 1993). "A Combined Experimental and Theoretical Study of Flow and Pressure Distributions in a Brush Seal." ASME. J. Eng. Gas Turbines Power. April 1993; 115(2): 404–410. https://doi.org/10.1115/1.2906723
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