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Tip clearance flows in axial flow compressors and pumps


Rains, Dean A. (1954) Tip clearance flows in axial flow compressors and pumps. Dissertation (Ph.D.), California Institute of Technology.


Flow in the clearance at the rotor blade tips of axial flow compressors and pumps was studied experimentally and theoretically with particular attention to losses. It is shown that losses due to blade tip clearances can be evaluated in a simple manner for high efficiency turbomachines. A vortex sheet formed by the clearance flow was found to roll up into a vortex of such strength that cavitation in axial flow pumps begins in the vortex rather than on the blade surface.

Item Type:Thesis (Dissertation (Ph.D.))
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Mechanical Engineering
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Unknown, Unknown
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1954
Record Number:CaltechETD:etd-04152003-112816
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1391
Deposited By: Imported from ETD-db
Deposited On:15 Apr 2003
Last Modified:26 Dec 2012 02:37

Thesis Files

PDF (Rains_da_1954.pdf) - Final Version
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