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An Experimental and Theoretical Investigation of Two-Dimensional Centrifugal Pump Impellers


Acosta, Allan James (1952) An Experimental and Theoretical Investigation of Two-Dimensional Centrifugal Pump Impellers. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/159P-SA35.


An experimental and theoretical investigation on a series of three centrifugal pump impellers has been made in order to determine the usefulness and validity of tyro-dimensional potential theory for the description of the flow. Computed values of the developed head and distribution of pressure on the vane surfaces are compared with measurements an two-, four-, and six- bladed impellers which have 30° logarithmic spiral vanes and a radius ratio of about one-half.

It is found that for operating points where the influence on the flow into the impeller by the inlet turn is least, the agreement between the observed and predicted values is reasonably good, while for other flow rates large discrepancies occur. Although the impeller efficiency is relatively high when the flow is least disturbed by the inlet, the slope of the work coefficient line is steeper than the theoretically predicted value. This deviation is attributed to boundary layers which are observed on the vane surfaces.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:(Mechanical Engineering and Aeronautics)
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Mechanical Engineering
Minor Option:Aeronautics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Hollander, Aladar
Thesis Committee:
  • Plesset, Milton S. (chair)
  • Erdélyi, Arthur
  • Hollander, A.
  • Hudson, Donald E.
  • Liepmann, Hans Wolfgang
  • Rannie, W. Duncan
  • Stewart, Homer Joseph
Defense Date:1 January 1952
Funding AgencyGrant Number
Office of Naval Research (ONR)UNSPECIFIED
Record Number:CaltechETD:etd-04072003-091659
Persistent URL:
Related URLs:
URLURL TypeDescription DocumentHydrodynamics Laboratory Technical Report 21-9
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1282
Deposited By: Imported from ETD-db
Deposited On:07 Apr 2003
Last Modified:16 May 2023 21:11

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