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Viscous Effects in Inception and Development of Cavitation on Axi-Symmetric Bodies Part I - Cavitation Inception Part II - A Semi-Empirical Method to Predict Cavitation Separation on Smooth Bodies

Arakeri, Vijay H. (1973) Viscous Effects in Inception and Development of Cavitation on Axi-Symmetric Bodies Part I - Cavitation Inception Part II - A Semi-Empirical Method to Predict Cavitation Separation on Smooth Bodies. California Institute of Technology , Pasadena, CA. (Unpublished) https://resolver.caltech.edu/CaltechAUTHORS:20141015-142028989

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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:Report or Paper (Technical Report)
Additional Information:© 1973 California Institute of Technology. Report No. Eng. 183-1. This research was sponsored by the Naval Ship Systems Command General Hydromechanics Research Program, SR0230101, Administered by the Naval Ship Research and Development Center prepared under Office of Naval Research Contract N00014-67-A-0094-0023. The author would like to gratefully acknowledge the financial support provided by the Office of Naval Research and the Naval Ship Research and Development Center through Contract No. N00014-67-A-0094-0023 which has made this experimental study possible. Major portions of the tunnel ope rational costs were financed by a grant from the Sloan Foundation. This support is greatfully acknowledged.
Funders:
Funding AgencyGrant Number
Office of Naval Research (ONR)N00014-67-A-0094-0023
Alfred P. Sloan FoundationUNSPECIFIED
Record Number:CaltechAUTHORS:20141015-142028989
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20141015-142028989
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50419
Collection:CaltechAUTHORS
Deposited By: Kristin Buxton
Deposited On:15 Oct 2014 22:08
Last Modified:03 Oct 2019 07:23

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