Conference Item records
https://feeds.library.caltech.edu/people/Uy-R-V/conference_item.rss
A Caltech Library Repository Feedhttp://www.rssboard.org/rss-specificationpython-feedgenenSat, 13 Apr 2024 00:21:40 +0000A Parametric Evaluation of the Effect of Inlet Swirl on the Rotordynamic Forces Generated by Discharge-to-Suction Leakage Flows in Shrouded Centrifugal Pumps
https://resolver.caltech.edu/CaltechAUTHORS:UYRfedsm97
Authors: {'items': [{'id': 'Uy-R-V', 'name': {'family': 'Uy', 'given': 'Robert V.'}}, {'id': 'Bircumshaw-B-L', 'name': {'family': 'Bircumshaw', 'given': 'Brian L.'}}, {'id': 'Brennen-C-E', 'name': {'family': 'Brennen', 'given': 'Christopher E.'}}]}
Year: 1997
Unsteady forces generated by the fluid flow through the impeller leakage path of a centrifugal pump were investigated. The effect of leakage path inlet (pump discharge) swirl on the rotordynamic forces was examined for various ratios of fluid tangential velocity to impeller tip speed. It was observed that changing the inlet swirl velocity does not appear to significantly affect the measured forces for a given leakage flow coefficient. A bulk flow numerical model was found to predict the same general result. The model agreed with experimental data for small values of the leakage flow coefficient.https://authors.library.caltech.edu/records/thxnc-2ba53Rotordynaqmic Forces from Discharge-to-Suction Leakage Flows in Centrifugal Pumps: Effects of Geometry
https://resolver.caltech.edu/CaltechAUTHORS:UYRicfe97
Authors: {'items': [{'id': 'Uy-R-V', 'name': {'family': 'Uy', 'given': 'Robert V.'}}, {'id': 'Bircumshaw-B-L', 'name': {'family': 'Bircumshaw', 'given': 'Brian L.'}}, {'id': 'Brennen-C-E', 'name': {'family': 'Brennen', 'given': 'Christopher E.'}}]}
Year: 1997
The rotordynamic forces generated by the fluid flow through the impeller leakage path of a centrifugal pump are now well established. The present paper examines the effects of modifying the leakage path geometry by changing the front shroud, from a conical shape to a more typical curved design, and the effects of low pressure seal design on these forces. It is found that only the cross-coupled stiffness is affected by the change of path geometry. Changing the low pressure seal from an axial to a radial clearance does, however, significantly affect the rotordynamic forces. A bulk flow numerical model is found to predict the same general result for the low pressure seal tests. The model agrees with the general trends with increasing leakage flow coefficient exhibited by the data, but appears to underpredict the magnitude of the normal force.https://authors.library.caltech.edu/records/s14mk-rj748Fluid Flow Equations for Rotordynamic Flows in Seals and Leakage Paths
https://resolver.caltech.edu/CaltechAUTHORS:CEBisromac98
Authors: {'items': [{'id': 'Brennen-C-E', 'name': {'family': 'Brennen', 'given': 'C. E.'}}, {'id': 'Uy-R-V', 'name': {'family': 'Uy', 'given': 'R. V.'}}]}
Year: 1998
Fluid-induced rotordynamic forces produced by the fluid in an annular seal or in the leakage passage surrounding the shroud of a pump or turbine, are known to contribute substantially to the potential excitation forces acting on the rotor. In this paper we explore some of the important features of the equations governing bulk-flow models of these flows. This in turn suggests methods which might be used to solve these bulk-flow equations in circumstances where the linearized solutions (such as those of Childs 1987, 1989) will no longer be accurate. An example of a numerical solution is then presented.https://authors.library.caltech.edu/records/xxrts-xz751