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Zonal RANS-LES Computation for Near-Stall-Airfoil Flow

  • Benedikt RoidlEmail author
  • Koen J. Geurts
  • Wolfgang Schröder
Conference paper
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 131)

Abstract

A fully coupled zonal Reynolds-averaged Navier-Stokes - large-eddy simulation method (zonal RANS-LES) is applied to subsonic flow over the HGR-01 airfoil at high angle of attack. Several zonal-boundary formulations such as forcing layers, a reformulated synthetic turbulent generation method, and a turbulent reconstruction approach are discussed. It is shown that the aerodynamic properties are satisfactorily predicted and the computational costs for a subsonic airfoil near stall compared to a pure LES are decreased by a factor of approximately four. Nevertheless, it has to be stated that the local RANS solution has a non-negligible impact on the susceptible flow phenomena such as the separation when the RANS-LES boundary is located in a non-zero pressure gradient flow regime. This RANS impact is even more pronounced when a pressure driven coupling between an LES-RANS and a RANS-LES boundary exists.

Keywords

Turbulent Kinetic Energy Adverse Pressure Gradient Aerodynamic Property Laminar Separation Bubble RANS Simulation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Alkishriwi, N., Schröder, W., Meinke, M.: A Large-Eddy Simulation Method for Low Mach Number Flows Using Preconditioning and Multigrid. Comput. Fluids 35(10), 1126–1136 (2006)CrossRefGoogle Scholar
  2. 2.
    Boris, J.P., Grinstein, F.F., Oran, E.S., Kolbe, R.L.: New insights into large eddy simulation. Fluid Dynam. Res. 10, 199–228 (1992)CrossRefGoogle Scholar
  3. 3.
    Celić, A., Hirschel, E.H.: Comparison of eddy-viscosity turbulence models in flows with adverse pressure gradient. AIAA J. 44(10), 2153–2169 (2006)Google Scholar
  4. 4.
    El-Askary, W., Schröder, W., Meinke, M.: LES of compressible wall-bounded flows. AIAA Paper (2003–3554) (2003)Google Scholar
  5. 5.
    Fröhlich, J., von Terzi, D.: Hybrid LES/RANS methods for the simulation of turbulent flows. Prog. Aerosp. Sci. 44, 349–377 (2008)CrossRefGoogle Scholar
  6. 6.
    Geurts, K.J., Meinke, M., Schröder, W.: A fully coupled zonal rans-les method for high angle of attack flow. AIAA-2012-3023 (2012)Google Scholar
  7. 7.
    König, D., Meinke, M., Schröder, W.: Embedded LES/RANS boundary in zonal simulations. J. Turbul. 11(7), 1–25 (2010)Google Scholar
  8. 8.
    Liou, M.S., Steffen Jr., C.J.: A New Flux Splitting Scheme. J. Comp. Phys. 107, 23–39 (1993)MathSciNetCrossRefGoogle Scholar
  9. 9.
    Meinke, M., Schröder, W., Krause, E., Rister, T.: A comparison of second- and sixth-order methods for large-eddy simulations. Comput. Fluids 31, 695–718 (2002)CrossRefGoogle Scholar
  10. 10.
    Roidl, B., Meinke, M., Schröder, W.: Zonal RANS-LES computation of transonic airfoil flow. In: 29th AIAA Applied Aerodynamics Conference on AIAA Paper 2011–3974, pp. 27–30, Honolulu, Hawaii, June 2011Google Scholar
  11. 11.
    Roidl, B., Meinke, M., Schröder, W.: A reformulated synthetic turbulence generation method for a zonal RANS-LES method and its application to zero-pressure gradient boundary layers. Int. J. Heat Fluid Flow 44, 28–40 (2013)CrossRefGoogle Scholar
  12. 12.
    Roidl, B., Meinke, M., Schröder, W.: Boundary layers affected by different pressure gradients investigated computationally by a zonal rans-les method. Int. J. Heat Fluid Flow 45, 1–13 (2014)CrossRefGoogle Scholar
  13. 13.
    Spalart, P.R., Allmaras, S.R.: A One-Equation turbulence model for aerodynamic flows. In: 30th Aerospace Sciences Meeting & Exhibit on AIAA-Paper 92–0439, January 6–9, Reno (1992)Google Scholar
  14. 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 on DNS/LES, pp. 137–147. Greyden Press, Columbus (1997)Google Scholar
  15. 15.
    Wilcox, D.C.: Turbulence Modeling for CFD. DCW Industries (1998)Google Scholar
  16. 16.
    Wokoeck, R., Krimmelbein, N., Ortmans, J., Ciobaca, V., Radespiel, R., Krumbein, A.: RANS Simulations and Experiments on the Stall Behaviour of an Airfoil with Laminar Separation Bubbles. AIAA-2006-0244 (2006)Google Scholar
  17. 17.
    Zhang, Q., Schröder, W., Meinke, M.: A zonal RANS/LES method to determine the flow over a high-lift configuration. Comput. Fluids 39, 1241–1253 (2010)CrossRefGoogle Scholar

Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  • Benedikt Roidl
    • 1
    Email author
  • Koen J. Geurts
    • 1
  • Wolfgang Schröder
    • 1
  1. 1.Institute of AerodynamicsRWTH Aachen UniversityAachenGermany

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