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Hydrodynamic impeller stiffness, damping, and inertia in the rotordynamics of centrifugal flow pumps
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Jery, S. Caughey, T. K. Brennen, C. E. Acosta, A. J. |
| Copyright Year | 1984 |
| Description | The lateral hydrodynamic forces experienced by a centrifugal pump impeller performing circular whirl motions within several volute geometries were measured. The lateral forces were decomposed into: (1) time averaged lateral forces and (2) hydrodynamic force matrices representing the variation of the lateral forces with position of the impeller center. It is found that these force matrices essentially consist of equal diagonal terms and skew symmetric off diagonal terms. One consequence of this is that during its whirl motion the impeller experiences forces acting normal and tangential to the locus of whirl. Data on these normal and tangential forces are presented; it is shown that there exists a region of positive reduced whirl frequencies, within which the hydrodynamic forces can be destablizing with respect to whirl. |
| File Size | 1427383 |
| Page Count | 24 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19850005816 |
| Archival Resource Key | ark:/13960/t4wh7dk87 |
| Language | English |
| Publisher Date | 1984-12-01 |
| Access Restriction | Open |
| Subject Keyword | Mechanical Engineering Damping Dynamic Characteristics Axial Flow Pumps Centrifuging Stress Rotors Impellers Mechanical Properties Centrifugal Pumps Turbomachinery Hydrodynamics Stiffness Inertia Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
