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Modification of an algebraic bypass-transition model in region near the stagnation point
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SYSNO ASEP 0361276 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Modification of an algebraic bypass-transition model in region near the stagnation point Author(s) Straka, P. (CZ)
Příhoda, Jaromír (UT-L) RID, ORCIDNumber of authors 2 Source Title Conference Topical Problems of Fluid Mechanics 2011. - Prague : Institute of Thermomechanics AS CR, v. v. i., 2011 / Příhoda J. ; Kozel K. - ISBN 978-80-87012-32-1 Pages s. 105-108 Number of pages 4 s. Action Topical Problems of Fluid Mechanics 2011 Event date 16.02.2011-17.02.2011 VEvent location Praha Country CZ - Czech Republic Event type EUR Language eng - English Country CZ - Czech Republic Keywords bypass transition modelling ; k-omega turbulence model ; flow near the stagnation point Subject RIV BK - Fluid Dynamics R&D Projects GAP101/10/1329 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20760514 - UT-L (2005-2011) Annotation 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. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2012
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