Abo Bibliothek: Guest
First Symposium on Turbulence and Shear Flow Phenomena
September, 12-15, 1999, Doubletree Resort, Santa Barbara, California, USA

DOI: 10.1615/TSFP1

NUMERICAL SIMULATION OF TRANSONIC BUFFET FLOWS USING VARIOUS TURBULENCE CLOSURES

pages 995-1000
DOI: 10.1615/TSFP1.1590
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ABSTRAKT

Numerical simulation of buffet flows have been performed using various turbulence models, including linear and non-linear low-Re eddy-viscosity models. The accuracy of the models has been assessed against experimental data for transonic flows around the NACA-0012 aerofoil. Discretisation of the mean flow and turbulence transport equations is obtained by a Riemann solver up to third-order accurate. The time integration is obtained by an implicit unfactored method. The study shows that two-equation models associated with functional cμ coefficient in the calculation of the eddy-viscosity (henceforth labelled NL-cμ), provide better results. The Spalart-Allmaras one-equation model provides comparable results with the above models, while larger inaccuracies are presented in the case of linear and non-linear models with constant cμ coefficient. The buffet onset boundaries are similarly predicted by the one-equation and NL-cμ models.

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