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Hydraulic forces on a centrifugal impeller undergoing synchronous whirlHigh speed centrifugal rotating machinery with large vibrations caused by aerodynamic forces on impellers was examined. A method to calculate forces in a two dimensional orbiting impeller in an unbounded fluid with nonuniform entering flow was developed. A finite element model of the full impeller is employed to solve the inviscid flow equations. Five forces acting on the impeller are: Coriolis forces, centripetal forces, changes in linear momentum, changes in pressure due to rotation and pressure changes due to linear momentum. Both principal and cross coupled stiffness coefficients are calculated for the impeller.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Allaire, P. E.
(Virginia Univ. Charlottesville, VA, United States)
Sato, C. J.
(BE & IC Enginnering Co. Birmingham, Ala., United States)
Branagan, L. A.
(Pacific Gas and Electric Co. San Ramon, Calif., United States)
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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