Turbulence modelling techniques for aeroelastic problems: results and comments from the Second AIAA Aeroelastic Prediction Workshop
Aircraft Engineering and Aerospace Technology
ISSN: 0002-2667
Article publication date: 4 September 2017
Abstract
Purpose
The quality of aeroelastic predictions strongly depends on the quality of aerodynamic predictions. At the boundary of a typical flight envelope, special flow conditions may arise, which challenge the conventional Reynolds-averaged Navier–Stokes (RANS) approach beyond reasonable limits.
Design/methodology/approach
Test Case 3 of the Second AIAA Aeroelastic Prediction Workshop is a representative test case, where the flow over a supercritical wing separates downstream of the shock waves and generates large turbulent lengthscales.
Findings
In this study, RANS predictions are compared to those obtained in this particular test case with the more sophisticated hybrid RANS–large eddy simulation (LES) approach, in particular with the Spalart–Allmaras–delayed detached eddy simulation model. Results are indeed closer to experimental data.
Originality/value
However, the costs associated with this approach are much higher. It is argued that adopting hybrid RANS–LES modelling is not a simple model switch.
Keywords
Acknowledgements
The author gratefully acknowledges the support provided in the many interesting discussions with Jennifer Heeg, Dave Schuster and Pawel Chwalowksi (NASA Langley); Daniella Raveh (Technion); Alessandro Scotti (Pilatus Aircraft); and the other participants to the Second AIAA Aeroelastic Prediction Workshop.
Citation
Righi, M. (2017), "Turbulence modelling techniques for aeroelastic problems: results and comments from the Second AIAA Aeroelastic Prediction Workshop", Aircraft Engineering and Aerospace Technology, Vol. 89 No. 5, pp. 683-691. https://doi.org/10.1108/AEAT-01-2017-0051
Publisher
:Emerald Publishing Limited
Copyright © 2017, Emerald Publishing Limited