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International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.5

ISSN Печать: 2152-5102
ISSN Онлайн: 2152-5110

Выпуски:
Том 46, 2019 Том 45, 2018 Том 44, 2017 Том 43, 2016 Том 42, 2015 Том 41, 2014 Том 40, 2013 Том 39, 2012 Том 38, 2011 Том 37, 2010 Том 36, 2009 Том 35, 2008 Том 34, 2007 Том 33, 2006 Том 32, 2005 Том 31, 2004 Том 30, 2003 Том 29, 2002 Том 28, 2001 Том 27, 2000 Том 26, 1999 Том 25, 1998 Том 24, 1997 Том 23, 1996 Том 22, 1995

International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v28.i4.70
10 pages

Oscillations of a Slender Supercavitating Hydrofoil under a Free Surface

V. N. Semenenko
Institute of Hydromechanics of National Academy of Sciences of Ukraine, Kyiv, Ukraine
T. N. Semenenko
Institute of Railway Transport, Kyiv, Ukraine

Краткое описание

A set of integral equations for low-disturbed flow around two-dimensional supercavitating and ventilated oscillating hydrofoils under a free surface is obtained. A method to calculate time dependence of the unsteady cavity length by numerical solving the nonlinear equation of gas mass in the cavity balance (or the equation of the cavity pressure to be constant for vapor supercavities) is proposed. It is shown that approach to a free surface results in decreasing relative amplitudes of oscillations of the cavity length and hydrodynamic forces. Taking account of the variable cavity length results in smoothing frequency responses of forces in comparison with calculation when the cavity length is constant.


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