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Hybrid RANS/LES of an Isolated Engine Nacelle with Crosswind Using an Unstructured CFD Solver

  • Marco Burnazzi
  • Axel ProbstEmail author
  • Mathias Steger
Conference paper
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 143)

Abstract

The present contribution focuses on the high-fidelity scale-resolving simulation of an isolated engine nacelle subjected to strong crosswind. The work, carried out with the DLR TAU code, shows shortcomings of a steady RANS approach in predicting total pressure losses for the transonic partially-separated intake flow and proves the higher accuracy of advanced hybrid RANS/LES methods. In particular, an IDDES approach is combined with a hybrid numerical scheme that assures low-dissipation and low-dispersion errors in the focus area and numerical stability in the surrounding regions (hybrid LD2 scheme). The results are validated by means of theoretical turbulence spectra and experimental integral data.

Notes

Acknowledgements

The present work was funded in part by Rolls-Royce within the framework of the FaNcI project (Fan Nacelle Integration) and in part by the DLR within the VicToria project (Virtual Aircraft Technology Integration Platform). The funding as well as the excellent collaboration with the partners from Rolls-Royce Deutschland, DLR and CFD Software GmbH is thankfully acknowledged.

References

  1. 1.
    Probst, A., Schulze, S., Kähler, C.J., Radespiel, R.: Reynolds-stress modelling of subsonic and transonic inlet stall compared to measurements. In: 3rd Symposium on Simulation of Wing and Nacelle Stall, Braunschweig, Germany, June 21–22 2012 (2012)Google Scholar
  2. 2.
    Görtz, S.: Projektplan, VicToria (Virtual Aircraft Technology Integration Platform), Duration: 01.07.2016 31.12.2019, Project leader: Dr. S. Görtz, Institute of Aerodynamics and Flow Technology, DLR BraunschweigGoogle Scholar
  3. 3.
    Schwamborn, D.: Results and lessons learned from the EU-Project ATAAC. In: Braza M., Bottaro A., Thompson M. (eds.), Advances in Fluid-Structure Interaction. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol. 133, pp. 221–233. Springer, Berlin (2013)Google Scholar
  4. 4.
    Shur, M., Spalart, P., Strelets, M., Travin, A.: A hybrid RANS-LES approach with delayed-DES and wall-modelled LES capabilities. Int. J. Heat Fluid Flow, Elsevier Inc. 29(6), 406—417 (2008)Google Scholar
  5. 5.
    Mockett, C., Fuchs, M., Garbaruk, A., Shur, M., Spalart, P., Strelets, M., Thiele, F., Travin, A.: Two non-zonal approaches to accelerate RANS to LES transition of free shear layers in DES. In: Progress in Hybrid RANS-LES Modelling, Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol. 130, pp. 187–201. Springer, Berlin (2015)Google Scholar
  6. 6.
    Probst, A., Löwe, J., Reuß, S., Knopp, T., Kessler, R.: Scale-resolving simulations with a low-dissipation low-dispersion second-order scheme for unstructured flow solvers. AIAA J. 54(10), 2972–2987 (2016)CrossRefGoogle Scholar
  7. 7.
    Kok, J.: A high-order low-dispersion symmetry-preserving finite-volume method for compressible flow on curvilinear grids. J. Comput. Phys. 228(18), 6811–6832 (2009)MathSciNetCrossRefGoogle Scholar
  8. 8.
    Löwe, J., Probst, A., Knopp, T., Kessler, R.: Low-dissipation low-dispersion second-order scheme for unstructured finite volume flow solvers. AIAA J. 54(10), 2961–2971 (2016)CrossRefGoogle Scholar
  9. 9.
    Travin, A., Shur, M.: Physical and numerical upgrades in the detached-eddy simulation of complex turbulent flows. Adv. LES Complex Flows 65(5), 239–254 (2002)CrossRefGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  1. 1.DLR (German Aerospace Research Center)Institute of Aerodynamics and Flow TechnologyGoettingenGermany
  2. 2.Design Systems EngineeringAerodynamics & Aeroacoustics, Rolls-Royce DeutschlandBlankenfelde-MahlowGermany

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