Balancing Destruction and Production in S-A Model-Based Hybrid RANS-LES for Flow around an Aerofoil with Mild Separation

  • Wei WangEmail author
  • Ning Qin
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 117)


The flow around the Aérospatiale A-airfoil at the maximum lift condition with a chord Reynolds number of 2.0×106 is simulated using Unsteady Reynolds-Averaged Navier-Stocks Simulation (URANS), Detached Eddy Simulation (DES), Delayed DES (DDES) and a new approach. The new approach (named WAD-DES) is based on the Spalart-Allmaras (S-A) model and has a weighted average of destruction terms from the Smagorinksy model and the S-A model. The aim of this study is to investigate the behaviour of the S-A-based model working as a sub-grid scale (SGS) model in simulating mild trailing edge separation. The results show that in the near-wall region WAD-DES is better than DES and comparable to DDES. In the wake region, WAD-DES provides the closest velocity profiles to those from the experimental data, due to a reduced level of modelled turbulent viscosity. It is shown that this new WAD-DES approach inherits the advantages of DDES in simulating shallow separation, and also increases the accuracy of prediction in regions further away from the wall.


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  1. Breuer, M., Jovicic, N., Mazaev, K.: Comparison of DES, RANS and LES for the separated flow around a flat plate at high incidence. International Journal for Numerical Methods in Fluids 41, 357–388 (2003)zbMATHCrossRefGoogle Scholar
  2. Deck, S.: Zonal-Detached Eddy Simulation of the flow around a high-lift configuration. AIAA Journal 43(11), 2372–2384 (2005)CrossRefGoogle Scholar
  3. Durrani, N., Qin, N.: Behaviour of Detached-Eddy Simulations for mild trailing-edge separation. Journal of Aircraft 48(1) (January-February 2011)Google Scholar
  4. Gleyzes, C., Capbern, P.: Experimental study of two AIRBUS/ONERA airfoils in near stall conditions. Part I: Boundary layers. Aerospace Science and Technology 7, 439–449 (2003)CrossRefGoogle Scholar
  5. Houddeville, R., Piccin, O., Cassoudesalle, D.: Opération décrochage – mesurement de frottement sur profiles AS 239 et A 240 à la soufflerie F1 du CFM. Technical Report RT-OA 19/5025 (RT-DERAT 19/5025 DN), ONERA (1987)Google Scholar
  6. Mellen, C.P., Frohlich, J., Rodi, W.: Lessons from the European LESFOIL project on LES of flow around an aerofoil. In: 40th AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, January 14-17 (2002) AIAA 2002-0111Google Scholar
  7. Menter, F.R., Kuntz, M.: Adaptation of eddy-viscosity turbulence models to unsteady separated flow behind vehicles. In: McCallen, R., Browand, F., Ross, J. (eds.) Symposium on the Aerodynamics of Heavy Vehicles: Trucks, Buses and Trains, Springer, Berlin (2004)Google Scholar
  8. Potsdam, M., Pullian, T.: Turbulence modeling treatment for rotorcraft wakes. In: AHS Specialist’s Conference on Aeromechanics, January 23-25 (2008)Google Scholar
  9. Schmidt, S., Thiele, F.: Detached Eddy Simulation of Flow around A-Airfoil. Flow, Turbulence and Combustion 71, 261–278 (2003)zbMATHCrossRefGoogle Scholar
  10. Shur, M., Spalart, P.R., Strelets, M.K., Travin, A.: Detached-eddy simulation of an airfoil at high angle of attack. In: Rodi, W., Laurence, D. (eds.) Proceedings of the Fourth International Symposium on Engineering Turbulence Modelling and Measurements, pp. 669–678. Elsevier, Amsterdam (1999)Google Scholar
  11. Shur, M., Spalart, P.R., Strelets, M.K., Travin, A.: Modification of SA Subgrid model in DES aimed to prevent activation of the low-Re terms in LES mode. In: DES Workshop, St. Petersburg, Russia (July 2003)Google Scholar
  12. Smagorinsky, J.: General circulation experiments with the primitive equations. Monthly Weather Review 91(3), 99–164 (1963)CrossRefGoogle Scholar
  13. Spalart, P.: Strategies for turbulence modelling and simulations. International Journal of Heat and Fluid Flows 21, 252–263 (2000)CrossRefGoogle Scholar
  14. Spalart, P.R., Jou, W.-H., Strelets, M., Allmaras, S.R.: Comments on the feasibility of LES for wings and on a Hybrid RANS/LES approach. In: Advances in DNS/LES, 1st AFOSR Int. Conf. on DNS/LES, August 4-8. Greyden Press, Columbus Ohio (1997)Google Scholar
  15. Spalart, P.R.: A new version of detached-eddy simulation, resistant to ambiguous grid densities. Theor. Comput. Fluid Dyn. 20, 181–195 (2006)zbMATHCrossRefGoogle Scholar
  16. Xia, H., Qin, N.: Detached-eddy simulation for synthetic jets with moving boundaries. Modern Physics Letters B 19(28-29), 1429–1435 (2005)zbMATHCrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringUniversity of SheffieldSheffieldUK

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