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Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
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.v41.i3.50
pages 260-281

Rigid Bodies without Boundary-Layer Separation

Igor G. Nesteruk
Institute of Hydromechanics of National Academy of Sciences of Ukraine 8/4, Zhelyabov St., 03680, Kyiv-180, MSP, Ukraine

Краткое описание

Shapes with a special pressure distribution can prevent boundary-layer separation and as a result can allow both reduction of drag and noise without any active flow-control methods. Examples of such axisymmetric and 2D shapes with favourable pressure gradients both up- and downstream of the maximum thickness point have been calculated with the use of a linearized approach as well as by exact solutions of the Euler equations for steady flows of an ideal fluid. The zone of positive pressure gradient can be diminished to just 0.3 % of the total body length. It is shown that similar shapes with negative pressure gradients can be obtained for sub- and supersonic flows of compressible fluid. Wind-tunnel tests with axisymmetric bodies have shown that separation can be avoided on some of these shapes.


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