A finite element perturbation method for computing fluid-induced forces on a centrifugal impeller rotating and whirling in a volute casing

Share/Save/Bookmark

Jonker, J.B. and Essen, T.G. van (1997) A finite element perturbation method for computing fluid-induced forces on a centrifugal impeller rotating and whirling in a volute casing. International Journal for Numerical Methods in Engineering, 40 (2). pp. 269-294. ISSN 0029-5981

open access
[img]
Preview
PDF
270kB
Abstract:A finite element based method has been developed for computing time-averaged fluid-induced radial excitation forces and rotor dynamic forces on a two-dimensional centrifugal impeller rotating and whirling in a volute casing. In this method potential flow theory is used, which implies the assumption of irrotational inviscid flow. In comparison with other analyses of fluid-induced impeller forces, two main features have been included. Firstly, the hydrodynamic interaction between impeller and volute isproperly modelled. Secondly, the variation of the width of the volute has been adequately included in the two-dimensional analysis by a modification of the equation of continuity. A regular perturbation method is used to deal with the effects of the whirling motion of the impeller. The excitation forces are calculated from the zeroth-order problem in which the impeller axis is placed at the volute origin. The rotor dynamic forces associated with the whirling motion of the impeller are derived from the first-order solution. The force components, tangential and normal to the whirl orbit, are predicted as functions of the impeller--volute geometry, the flow conditions and the whirl speed ratio. The method is applied to a centrifugal pump experimentally tested at the California Institute of Technology. Comparisons between predictions and experimental data show the capabilities of the proposed method to reproduce the main features of fluid-induced impeller forces in centrifugal pumps.
Item Type:Article
Copyright:© 1997 Wiley InterScience
Faculty:
Engineering Technology (CTW)
Research Group:
Link to this item:http://purl.utwente.nl/publications/71437
Official URL:http://dx.doi.org/10.1002/(SICI)1097-0207(19970130)40:2<269::AID-NME63>3.0.CO;2-G
Export this item as:BibTeX
EndNote
HTML Citation
Reference Manager

 

Repository Staff Only: item control page

Metis ID: 144350