Applied Mathematical Modelling, ( ISI ), Volume (62), No (1), Year (2018-5) , Pages (163-180)

Title : ( Numerical investigation of body and hole effects on the cavitating flow behind a disk cavitator at extremely low cavitation numbers )

Authors: Mohammad Reza Erfanian Abdi Tousi , M. Anbarsooz ,

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Abstract

Supercavitation has been recently proposed as an effective method for drag reduction of underwater vehicles. For this purpose, a cavitator is used to generate a large continuous bubble to cover the vehicle. Extremely low cavitation numbers are required in these applications to provide a sufficiently voluminous cavity. In this study, the effects of body presence inside the cavity of a disk-shaped cavitator are studied numerically. An element based finite volume approach is used for solving Reynolds-averaged Navier-Stokes equations. In order to validate the numerical scheme, turbulence and cavitation models, the cavitating flow over a hemispherical nosed cylinder body and also behind a disk-shaped cavitator has been simulated and the numerical results are validated against existing analytical and experimental data. Next, the effects of body presence inside the cavity of the disk-cavitator on the cavity characteristics are investigated. Results show that the cavity length is slightly smaller when it closes on the body, in comparison with the freely-closing cavity. Furthermore, the effects of adding a concentric hole with various diameters to the disk-cavitator on the cavity features are examined. The degree of drag reduction and changes of the cavity dimensions are determined at various cavitation numbers.

Keywords

, Supercavitation Cavitating flow Disk, cavitator Computational fluid dynamics (CFD) Re, entrant jet
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@article{paperid:1069081,
author = {Erfanian Abdi Tousi, Mohammad Reza and M. Anbarsooz},
title = {Numerical investigation of body and hole effects on the cavitating flow behind a disk cavitator at extremely low cavitation numbers},
journal = {Applied Mathematical Modelling},
year = {2018},
volume = {62},
number = {1},
month = {May},
issn = {0307-904X},
pages = {163--180},
numpages = {17},
keywords = {Supercavitation Cavitating flow Disk-cavitator Computational fluid dynamics (CFD) Re-entrant jet},
}

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%0 Journal Article
%T Numerical investigation of body and hole effects on the cavitating flow behind a disk cavitator at extremely low cavitation numbers
%A Erfanian Abdi Tousi, Mohammad Reza
%A M. Anbarsooz
%J Applied Mathematical Modelling
%@ 0307-904X
%D 2018

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