W. K. Liu*, D. Lam, T. Belytschko

*Corresponding author for this work

Research output: Contribution to journalArticle


In this investigation, a method has been developed for determining the hydrodynamic mass of the impeller stage of the rotor which accounts for the three dimensional geometry of the impellers and the effects of the fluid velocity. By using this method, more accurate calculations of resonant frequencies of the rotor and hence the seal forces can be made. In comparison with previous approaches, two main features have been included: 1) an accurate representation of the shape of the impeller and the pump geometry; 2) the effects of the velocity of the fluid. The method is based on a linear perturbation technique which assumes that the disturbance in the pump's flow boundaries and velocities caused by motion of the rotor are small. A potential method is used to estimate the undisturbed flow field. Results have been obtained for a prototypical centrifugal nuclear-pump.

Original languageEnglish (US)
Pages (from-to)var paging
JournalElectric Power Research Institute (Report) EPRI NP
StatePublished - Jan 1 1983

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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