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Experimental characterisation of carbon fibre brush seal leakage performance as a function of bristle pack geometrical parameters under dry conditions

Part of: ISABE 2017

Published online by Cambridge University Press:  05 September 2017

A. Bilal Outirba ,
B. Patrick Hendrick  and
C. Kevin Nicolas
A. Bilal Outirba*
Affiliation:
Université Libre de BruxellesAero-Thermo-Mechanics DepartmentF.-D. Roosevelt avenue n° 501050 Brussels, Belgium
B. Patrick Hendrick
Affiliation:
Université Libre de BruxellesAero-Thermo-Mechanics DepartmentF.-D. Roosevelt avenue n° 501050 Brussels, Belgium
C. Kevin Nicolas
Affiliation:
Safran Aircraft Engines VillarocheRond Point René Ravaud-Réau77550 Moissy-Cramayel, France
*
[email protected]
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Abstract

Over the last decades, it has been progressively acknowledged that reducing the specific fuel consumption and the emission of pollutants, as well as improving the thrust-to-weight ratio involves extensive research on advanced sealing technologies. Amongst these, brush seals are particularly well considered for their excellent leakage performance, their low friction properties, and their ability to cope with inevitable rotor excursions during flights. This paper presents the experimental work that has been carried on in order to characterise carbon fibre brush seals leakage rate in function of the bristle pack geometry, under different pressure loads and rotational speeds. The analysed parameters are the bristle-free length, the density and the inter-plate distance. The work, performed by the ULB (Université Libre de Bruxelles) in collaboration with French engine manufacturer Safran Aircraft Engines, highlights specific behaviour of carbon fibre brush seals under differential pressure, proposes a leakage prediction model developed through empirical equations, and discusses over the most influential parameters that influence the air consumption of a brush seal.

Keywords

Brush sealCarbon fibreLeakageLift-offBlow-downModelling
Type
Research Article
Information
The Aeronautical Journal , Volume 121 , Issue 1245 , November 2017 , pp. 1627 - 1647
Copyright
Copyright © Royal Aeronautical Society 2017 

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Footnotes

This paper was presented at the ISABE 2017 Conference, 3-8 September 2017, Manchester, UK.

References

REFERENCES

1. Moore, A. Gas turbine engine internal air systems. A review of the requirements and the problems, Proceedings of ASME 1975 Winter Annual Meeting: GT Papers, November 1975, Houston, Texas, US. DOI:10.1115/75-WA/GT-1.CrossRefGoogle Scholar
2. Merz, H. Brush seals of ceramic material for thermal turbomachines, United States Patent Number 4.809.990, 1986.Google Scholar
3. Ruggiero, E.J., Susini, P. and Lusted, M. Kevlar fiber brush seals for LNG compressors, Proceedings of 44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, Joint Propulsion Conferences, July 2008, Hartford, Connecticut, USA. DOI:10.2514/6.2008-4623.Google Scholar
4. Ruggiero, E.J., Allen, J. and Lusted, M. Heat generation characteristics of a carbon fiber brush seal, Proceedings of 44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, Joint Propulsion Conferences, July 2008, Hartford, Connecticut, US. DOI:10.2514/6.2008-4508.Google Scholar
5. Aksit, M.F., Bhate, N., Bouchard, C., Demiroglu, M. and Dogu, Y. Evaluation of brush seal performance for oil sealing applications, Proceedings of AIAA/SAE/ASME/ASEE 39th Joint Propulsion Conference, July 2003, Huntsville, Alabama, US. DOI:10.2514/6.2003-4695.Google Scholar
6. Chew, J.W., Lapworth, B.L. and Millener, P.J. Mathematical modelling of brush seals, International Journal of Heat and Fluid Flow, July 1995, 16, (6), pp 494–500. DOI: 10.1016/0142-727X(95)00061-T.Google Scholar
7. Pugachev, A.O. and Helm, P. Calibration of porous medium models for brush seals, Institution of Mechanical Engineers, Part A: Journal of Power and Energy, February 2009 223, (1), pp 83–91. DOI: 10.1243/09576509JPE641.Google Scholar
8. Pugachev, A.O. and Helm, P. Predicted performance of brush seals: Porous medium versus resolved bristle matrix and comparison with experimental data, Proceedings of the 10th European Conference on Turbomachinery Fluid dynamics and Thermodynamics ETC10, April 2013, Lappeenranta, Finland, Paper ETC2013-054.Google Scholar
9. Guimet, L., Sauvinet, F., Constant, O., Reynaud, P., Mengelle, P. and Lefrancois, M. Brush-type circular seal, 2015 United States Patent US 2015/026331 A1.Google Scholar
10. Wei, Y., Chen, Z. and Jiao, Y. Effects of geometry on leakage flow characteristics of brush seal, Journal of Harbin Institute of Technology, 1005-9113, (2), pp 1–7. DOI:10.11916/j.issn.1005-9113.2015.02.001.Google Scholar
11. Dogu, Y., Bahar, A.S., Sertakan, M.C., Piskin, A., Arican, E. and Kocagl, M. CFD investigation of brush seal leakage performance depending on geometric dimensons and operating conditions, Journal of Engineering Gas Turbines Power, July 2015, 138, (3), DOI: 10.1115/1.40331370.Google Scholar
12. Outirba, B. and Hendrick, P. Influence of geometrical parameters on the performance of carbon brush seals for aero-engines bearing chambers, Proceedings of ISABE 2015, October 2015, Phoenix, Arizona, US, Paper ISABE2015-20187.CrossRefGoogle Scholar
13. Zhao, H. and Stango, R.J. Role of distributed interbristle friction force on brush seal hysteresis, Journal of Tribology, July 2007, 129, (1), pp 199–204. DOI: 10.1115/1.2401218.Google Scholar
14. Aksit, M.F. and Aksoy, S. Brush seal dynamic stiffness behavior, Tribology International, 2012. Available at: https://core.ac.uk/download/pdf/11743104.pdf Google Scholar
15. Outirba, B. and Hendrick, P. Experimental testing of carbon brush seals for aero-engines bearing chambers, Proceedings of ASME Turbo Expo 2014, June 2014, Dsseldorf, Germany. DOI: 10.1115/GT2014-25684.CrossRefGoogle Scholar