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Static and dynamic characteristics of parallel-grooved sealsPresented is an analytical method to determine static and dynamic characteristics of annular parallel-grooved seals. The governing equations were derived by using the turbulent lubrication theory based on the law of fluid friction. Linear zero- and first-order perturbation equations of the governing equations were developed, and these equations were analytically investigated to obtain the reaction force of the seals. An analysis is presented that calculates the leakage flow rate, the torque loss, and the rotordynamic coefficients for parallel-grooved seals. To demonstrate this analysis, we show the effect of changing number of stages, land and groove width, and inlet swirl on stability of the boiler feed water pump seals. Generally, as the number of stages increased or the grooves became wider, the leakage flow rate and rotor-dynamic coefficients decreased and the torque loss increased.
Document ID
19870012772
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Iwatsubo, Takuzo
(Kobe Univ. Japan)
Yang, Bo-Suk
(Kobe Univ. Japan)
Ibaraki, Ryuji
(Toyota Motor Co. Tokyo, Japan)
Date Acquired
September 5, 2013
Publication Date
January 1, 1987
Publication Information
Publication: NASA. Lewis Research Center Rotordynamic Instability Problems in High-Performance Turbomachinery, 1986
Subject Category
Mechanical Engineering
Accession Number
87N22205
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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