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research-article

Effects of uncertainty and quasi-chaotic geometry on the leakage of brush seals

[+] Author and Article Information
Alexander Fuchs

Research Associate, Division Space Propulsion, Chair of Turbomachinery and Flight Propulsion, Department of Mechanical Engineering, Technical University of Munich, Boltzmannstraße 15, 85748 Garching bei München, Germany
alexander.fuchs@ltf.mw.tum.de

Oskar J. Haidn

Professor, Division Space Propulsion, Chair of Turbomachinery and Flight Propulsion, Department of Mechanical Engineering, Technical University of Munich, Boltzmannstraße 15, 85748 Garching bei München, Germany
oskar.haidn@ltf.mw.tum.de

1Corresponding author.

ASME doi:10.1115/1.4041081 History: Received February 14, 2018; Revised July 19, 2018

Abstract

This article presents a brief review of the experimental and theoretical state of the art regarding the leakage flow prediction of brush seals. The authors model a computational fluid dynamics based approach for the leakage flow of brush seals. The brush seal is treated by its real geometrical structure, namely numerous bristles in an array in transverse flow. For the inner composition of the package, two differing textures are chosen to study their influence on the leakage behavior. Furthermore, for each texture multiple inter-bristle distances, pressure ratios and turbulence models are evaluated. In addition, the influence of not regular arrangement configurations, which form a quasi-chaotic inner structure, are studied. The gained results are compared to other authors' experimental and numerical data.

Copyright (c) 2018 by ASME
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