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Viscous effects in inception and development of cavitation on axi-symmetric bodies. Cavitation inception. A semi-empirical method to predict caviation separation on smooth bodies

Citation

Arakeri, Vijay Hanumappa (1973) Viscous effects in inception and development of cavitation on axi-symmetric bodies. Cavitation inception. A semi-empirical method to predict caviation separation on smooth bodies. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechETD:etd-03272007-081335

Abstract

The schlieren method was developed as a flow visualization technique for use in water tunnels. The process of cavitation development on two axi-symmetric bodies was studied using this approach and found to be greatly influenced by the presence of a previously unreported viscous laminar separation. On these bodies, cavitation inception was observed to take place within this separated region which occurs far downstream of the minimum pressure point. On one of these bodies, the incipient cavitation index was found to be closely correlated with the negative value of the pressure coefficient at the point of laminar separation. Approximate computations of the position of transition on a body without laminar separation indicate that the incipient cavitation index is closely correlated with the negative value of the pressure coefficient at the predicted point of transition.

Cavitation separation under fully developed conditions is found to be preceded by a viscous laminar boundary layer separation on bodies which possess the latter separation under fully wetted conditions. An empirical method is proposed to compute the position of cavitation separation on such bodies and the method applied to a sphere and a cylinder showed good agreement with experiments

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):
  • Acosta, Allan J.
Thesis Committee:
  • Unknown, Unknown
Defense Date:17 August 1972
Record Number:CaltechETD:etd-03272007-081335
Persistent URL:http://resolver.caltech.edu/CaltechETD:etd-03272007-081335
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1167
Collection:CaltechTHESIS
Deposited By: Imported from ETD-db
Deposited On:27 Mar 2007
Last Modified:26 Dec 2012 02:35

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