Rotordynamic Effects of the Shroud-to-Housing Leakage Flow in Centrifugal Pumps

[+] Author and Article Information
E. A. Baskharone, A. S. Daniel, S. J. Hensel

Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843

J. Fluids Eng 116(3), 558-563 (Sep 01, 1994) (6 pages) doi:10.1115/1.2910313 History: Received May 17, 1993; Revised December 07, 1993; Online May 23, 2008


The fluid/shroud interaction forces acting on a pump impeller that is precessing around the housing centerline, are computed and the rotordynamic coefficients deduced. The numerical procedure utilized is an upgraded version of a finite-element-based perturbation model, initially devised for simple see-through annular seals. The computational model accounts for the complex flow structure in the shroud-to-housing secondary flow passage, which includes a tight-clearance face seal. The model also facilitates the mutual interaction between the primary and secondary flows near the impeller inlet and discharge stations. The numerical results are compared to existing experimental data, as well as the results of a simpler and widely used numerical model. Sources of discrepancies between the numerical results are identified, and a comprehensive assessment made in light of the experimental data.

Copyright © 1994 by The American Society of Mechanical Engineers
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