Multiple Brush Seals in Series

Author:

O’Neill Aideen T.1,Hogg Simon I.2,Withers Peter A.3,Turner Mike T.3,Jones Terry V.1

Affiliation:

1. University of Oxford, Oxford, UK

2. University of Leicester, Leicester, UK

3. Rolls-Royce plc, Bristol, UK

Abstract

Rolls-Royce has identified phenomena associated with aeroelastic instability of brush seal bristles, when multiple seals are operated in series at high pressure loading. This paper gives a general overview of test experience to date. A brush seal test facility commissioned by Rolls-Royce at Oxford University is described, along with results from double and triple brush seal tests carried out using the facility. The effect of bristle pack instability on sealing performance is clearly identified in the paper. A design modification aimed at suppressing the instability is described. Results from the Oxford University tests show that the device significantly increases the operating range of multiple seal arrangements.

Publisher

American Society of Mechanical Engineers

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1. Investigation of Brush Seal Instabilities;AIAA Propulsion and Energy 2020 Forum;2020-08-17

2. Effects of Uncertainty and Quasi-Chaotic Geometry on the Leakage of Brush Seals;Journal of Turbomachinery;2019-01-16

3. Brush Seals Used in Steam Environments—Chronological Wear Development and the Impact of Different Seal Designs;Journal of Engineering for Gas Turbines and Power;2015-10-27

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