Generalizing Circular Brush Seal Leakage Through a Randomly Distributed Bristle Bed PUBLIC ACCESS

[+] Author Affiliations
Raymond E. Chupp

Westinghouse Electric Corporation, Orlando, FL

Glenn F. Holle

Consultant, Show Low, AZ

Paper No. 94-GT-071, pp. V001T01A028; 11 pages
  • ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 1: Turbomachinery
  • The Hague, Netherlands, June 13–16, 1994
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7883-5
  • Copyright © 1994 by ASME


Brush seals have established a niche in the gas-to-gas sealing against leakage in modern turbine engines. The variable nature of the brush during operation makes leakage prediction difficult. A simple semi-empirical model based on an effective brush thickness parameter has been successfully used to correlate and predict brush seal leakage in engine environments. The model was extended to correlate a range of brush densities using a physically realistic brush thickness. Later, the model was based on mean diametrical brush properties for a large range of circular brush seal geometries. However, the best basis for modeling bristle distribution was unknown. This paper proposes a solution to the distribution problem by assuming a randomly distributed bristle bed. A random distribution leads to a rectangular array model that is supported by the quality of leakage data generalization. Applying the resultant effective thickness parameter to predict brush seal performance in turbine engines is discussed.

Copyright © 1994 by ASME
Topics: Leakage
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