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Radial Impeller Forces Using CFD: Part I — Model Development and Validation

[+] Author Affiliations
Daniel O. Baun

Concepts NREC, White River Junction, VT

Ronald D. Flack

University of Virginia, Charlottesville, VA

Paper No. GT2002-30377, pp. 513-520; 8 pages
  • ASME Turbo Expo 2002: Power for Land, Sea, and Air
  • Volume 5: Turbo Expo 2002, Parts A and B
  • Amsterdam, The Netherlands, June 3–6, 2002
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-3610-X | eISBN: 0-7918-3601-0
  • Copyright © 2002 by ASME


In part one of this two part paper, CFD is used to predict the flow field in a laboratory centrifugal water pump. Multiple frame of reference simulations were conducted on a full pump model, a four vane impeller, a spiral volute and an axial inlet pipe, using water as the working fluid. The impeller angular position was systematically indexed relative to the volute to simulate the rotation of an impeller vane passage by the volute tongue. Relative tangential and meridional velocity profiles at the impeller exit and across the volute were reconstructed from the quasi-unsteady simulations and compared with directly and previously measured profiles obtained from laser velocimetry. In addition, the impeller slip at the design flow was evaluated from the CFD results and compared with the slip obtained using laser velocimetry. Average pressure profiles around the impeller circumference and around the outer wall of the volute were reconstructed from the quasi-static CFD simulations and compared with measured profiles. The pump hydraulic characteristic was evaluated from the CFD and compared with the measured characteristic. The CFD model developed and validated in Part I is used to predict impeller forces in the same geometry for both incompressible and compressible fluids in Part II.

Copyright © 2002 by ASME



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