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Experimental results concerning centrifugal impeller excitationsThe effect of working fluid on the dynamics of an impeller with radial vanes was investigated. The impeller was supported vertically from a very flexible quill shaft in order to produce a low critical speed, and to allow the fluid dynamic effects on the impeller to predominate. The shaft was supported from ball bearings, so that there was no possibility of oil whip from fluid film bearings as a destabilizing influence. The impeller was run both in the atmosphere, and submerged in working fluids contained in a cylindrical housing, open at the top. Variable speed was obtained with a dc gearmotor drive unit. The speed was measured with a proximity probe pulse tachometer and electronic digital counter.
Document ID
19800021226
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Vance, J. M.
(Texas A&M Univ. College Station, TX, United States)
Landadio, F. J.
(Texas A&M Univ. College Station, TX, United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1980
Publication Information
Publication: NASA. Lewis Res. Center Rotordyn. Instability Probl. in High-Performance Turbomachinery
Subject Category
Mechanical Engineering
Accession Number
80N29727
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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