Prediction of Transonic Duct Flow Using a Zonal Hybrid RANS-LES Modeling Approach
Transonic duct flow with shock/boundary-layer interaction (SBLI) was analyzed using a zonal hybrid RANS-LES approach. The proposed zonal approach simulates the attached boundary layer flow, prior to the SBLI region in RANS mode. At a prescribed streamwise location, upstream of the SBLI region, the model switches to its hybrid RANS-LES mode over a buffer zone in order to avoid possible discontinuities. The corner separation bubbles, induced by the shock at M = 1.4, were mostly simulated in LES mode in order to improve the SBLI flow prediction. In addition to comparisons with experimental data, the zonal approach is compared to simulations using the SA-DDES and SA-IDDES model. The zonal approach predicted a corner separation bubble and a \(\lambda \)-shape shock which is in good agreement with experimental data. Furthermore, the predicted pressure rise across the shock agrees reasonably well with the experiment.
KeywordsTurbulent Viscosity Cross Flow Outlet Pressure Shock Intensity Shock Location
This work was funded by the Swedish Governmental Agency for Innovation Systems (VINNOVA) in the Swedish National Flight Research Program (NFFP, Contract No. 2009-01346 and 2013-01209) and Saab Aeronautics with support from the EU project ATAAC, Contract No. 233710. Computational resources were supported by the Swedish National Infrastructure for Computing (SNIC).
- 1.Arvidson, S.: Assessment and some improvements of hybrid RANS-LES methods. Licenciate thesis, Applied Mechanics, Chalmers University of Technology (2013). ISSN:1652–8565, 2013:01Google Scholar
- 2.Arvidson, S., Peng, S.H., Davidson, L.: Feasibility of hybrid RANS-LES of shock/boundary-layer interaction in a duct. In: Fu, S., et al. (eds.) Progress in Hybrid RANS-LES Modelling, NNFM, vol. 117, pp. 245–256. Springer, Heidelberg (2012)Google Scholar
- 3.Arvidson, S., Davidson, L., Peng, S.H.: Hybrid RANS-LES modeling using a low-Reynolds-number \(k-\omega \) based model. In: AIAA paper 2014–0225, National Harbour, Maryland (2014)Google Scholar
- 6.Eliasson, P.: EDGE, a Navier-Stokes solver for unstructured grids. Scientific report FOI-R-0298-SE, Computational Aerodynamics Department, Aeronautics Division, FOI (2001)Google Scholar
- 10.Spalart, P.R., Allmaras, S.R.: A one-equation turbulence model for aerodynamic flows. La Recherche Aérospatiale 1, 5–21 (1994)Google Scholar