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Identification of dynamic coefficients of annular turbulent sealsAn identification procedure to determine dynamic coefficients of annular turbulent seals in turbopumps is presented. Measurements were carried out at a built test rig with two symmetrical arranged seals. A rigid rotating shaft is surrounded by an elastically supported housing, which is excited by impact forces. The relative radial motion between the rotating parts and the housing, respectively between the seal surfaces, is measured by displacement pick-ups and from the time signals complex frequency response functions can be calculated. Finally an analytical model, depending on the seal parameters, is fitted to the measured data, to find the dynamic coefficients.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Nordmann, R.
(Kaiserslautern Univ.)
Massmann, H.
(Kaiserslautern Univ.)
Date Acquired
August 12, 2013
Publication Date
December 1, 1984
Publication Information
Publication: NASA. Lewis Research Center Rotordynamic Instability Problems in High-Performance Turbomachinery
Subject Category
Mechanical Engineering
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
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