Measurements of Rotordynamic Force Coefficients of Metallic Type Brush Seals

  • Pascal Jolly
  • Olivier Bonneau
  • Mihai Arghir
  • Florent Cochain
  • Jérôme Dehouve
Conference paper
Part of the Mechanisms and Machine Science book series (Mechan. Machine Science, volume 60)


The present paper presents experimental measurements of rotordynamic force coefficients for a multistage arrangement of four identical brush seals. The bristles are metallic, with a lay angle of \(50^{\circ }\) from radial centerline and have an initial radial interference with the shaft of 0.12 mm. According to a radial feeding groove, two pairs of two seals are tested face to face. The supply pressures are 0.54, 0.82, 1.1, 1.75 and 2.4 MPa, with a discharge pressure of 0.4 MPa. The working fluid is water. The rotor is centered and the operating spinning speeds are 50, 3000 and 6000 rpm. For given working conditions (supply pressure and rotor speed), a set of dynamic excitations (two directions and 8 frequencies), imposed to the rotor, provide complex impedances that are used for identifying rotordynamic force coefficients. Results are discussed in order to highlight the respective impact of rotor speed and supply pressure on brush seals performances.


Brush seals Rotordynamic force coefficients Water 



The authors are grateful to Centre National d’Etudes Spatiales (CNES) and to ARIANE GROUP for using the test rig BALAFRE and for their agreement to present this experimental work. This work was partially funded by the French Government program “Investissements d’Avenir” (EQUIPEX GAP, reference ANR-11-EQPX-0018).


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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Pascal Jolly
    • 1
  • Olivier Bonneau
    • 1
  • Mihai Arghir
    • 1
  • Florent Cochain
    • 2
  • Jérôme Dehouve
    • 3
  1. 1.Institut Pprime, CNRS - Université de Poitiers - ISAE ENSMAChasseneuil du PoitouFrance
  2. 2.Ariane GroupVernonFrance
  3. 3.CNES, DLAParisFrance

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