0
TECHNICAL PAPERS

Experimental and Numerical Studies in a Centrifugal Pump With Two-Dimensional Curved Blades in Cavitating Condition

[+] Author and Article Information
O. Coutier-Delgosha, R. Fortes-Patella, J. L. Reboud

Laboratoire des Ecoulements, Géophysiques et Industriels, B. P. 53, Grenoble, 38041, France

M. Hofmann, B. Stoffel

Laboratory for Turbomachinery and Fluid Power, Darmstadt University of Technology, Darmstadt D-64289, Germany

J. Fluids Eng 125(6), 970-978 (Jan 12, 2004) (9 pages) doi:10.1115/1.1596238 History: Received June 26, 2002; Revised October 24, 2002; Online January 12, 2004
Copyright © 2003 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
(a) Impeller geometry, (b) housing
Grahic Jump Location
Unsteady-state of blade cavitation on suction side, NPSH=8 m, stroboscopic light illumination (a scaling bar is added to each image, representing a length of 10 mm)
Grahic Jump Location
Unsteady-state of blade cavitation on pressure side at two different time and NPSH=7 m (laser light sheet)
Grahic Jump Location
Mean vapor distribution and standard deviation on pressure side, Qn, NPSH=7 m
Grahic Jump Location
Mean vapor distribution and standard deviation on pressure side, Qn, NPSH=6 m
Grahic Jump Location
The barotropic state law ρ(P) for water
Grahic Jump Location
Mesh of the leading edge with (a) a H-I type mesh, (b) a H-O type mesh
Grahic Jump Location
Mesh applied for the calculations (300,000 cells). (a) Meridional view, (b) three-dimensional view of a blade-to-blade channel, (c) view of the mesh on hub side of the pump. (The entire pump geometry is reconstructed by rotation of the single blade-to-blade channel.)
Grahic Jump Location
(a) Total pressure elevation in the pump (nominal flow rate), (b) characteristics H(Q) of the pump in noncavitating conditions
Grahic Jump Location
Head drop chart at nominal flow rate. The points indicate the cavitating conditions visualized on Figs. 13 and 14. The line corresponds to the apparition of vapor.
Grahic Jump Location
Development of the two-phase areas as NPSH decreases (corresponding to points on Fig. 12)
Grahic Jump Location
Void ratio evolution on a blade-to-blade surface close to the shroud, and velocity fields (corresponding to the NPSH decrease represented on Fig. 12)
Grahic Jump Location
Vapor structures on suction side (experiment NPSH=8 m, computation NPSH=7 m). Calculation: iso-density contour (ρ≈0.95ρ1: void ratio >5 percent) drawn in yellow, shroud in blue, blade in gray.
Grahic Jump Location
(a) Numerical void ratio distribution, (b) pressure side cavity, comparison with experiment (NPSH=7 m)
Grahic Jump Location
Head-drop curves in cavitating conditions: comparison at 0.8 Qn, Qn, and 1.08 Qn.
Grahic Jump Location
NPSH values for 3 percent and 10 percent head drop

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In