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Investigation of Interaction between Vortices and Cavitation in a Turbulent Shear Layer

Authors :
Takashi OHTA
Hiroki SAKAI
Kie OKABAYASHI
Takeo KAJISHIMA
Source :
Journal of Fluid Science and Technology, Vol 6, Iss 6, Pp 1021-1035 (2011)
Publication Year :
2011
Publisher :
The Japan Society of Mechanical Engineers, 2011.

Abstract

We performed numerical simulations of a non-steady separated shear layer with and without cavitation to examine the effect on flow dynamics. Particular focus was given to the interaction between vortices and cavitation. In the simulations, streamwise and spanwise vortices generated by the instability of a shear layer flow, typical features in such a flow field, were formed further upstream in cavitating than in non-cavitating flows. In cavitating flows, the vortex shedding frequency and the Reynolds stresses increase, and we observed vortex weakening caused by cavitation. We found that a Burgers-type vortex can become the origin of a cavity. Contrarily, the growth of the cavity attenuates the corresponding vortex. We described this influence of a cavity on a streamwise vortex with a simple inviscid model.

Details

Language :
English
ISSN :
18805558
Volume :
6
Issue :
6
Database :
Directory of Open Access Journals
Journal :
Journal of Fluid Science and Technology
Publication Type :
Academic Journal
Accession number :
edsdoj.fa8583c4bdfb4bb79f72c751ad94a114
Document Type :
article
Full Text :
https://doi.org/10.1299/jfst.6.1021