Original title: Modification of an algebraic bypass-transition model in region near the stagnation point
Authors: Straka, P. ; Příhoda, Jaromír
Document type: Papers
Conference/Event: Topical Problems of Fluid Mechanics 2011, Praha (CZ), 2011-02-16 / 2011-02-17
Year: 2011
Language: eng
Abstract: An algebraic model of bypass transition was applied for the numerical simulation of flow over the NACA 0012 airfoil. The system of governing equations is formed by the averaged Navier-Stokes equations closed by the k-omega turbulence model. The intemittent character of the transitional flow is described by the algebraic relation for the intermittency coefficient and by empirical relations for the onset and the length of the transition region. The constitutive relation for the turbulent velocity was modified to improve the prediction near the wall and near the leading edge. The prediction of transitional flow was carried out for the Reynolds number Re = 6x10^5 and free stream turbulence Tu = 0.3%. The agreement of numerical results with experimental data is quite good.
Keywords: bypass transition modelling; flow near the stagnation point; k-omega turbulence model
Project no.: CEZ:AV0Z20760514 (CEP), GAP101/10/1329 (CEP)
Funding provider: GA ČR
Host item entry: Conference Topical Problems of Fluid Mechanics 2011, ISBN 978-80-87012-32-1

Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0198630

Permalink: http://www.nusl.cz/ntk/nusl-55799


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Research > Institutes ASCR > Institute of Thermomechanics
Conference materials > Papers