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Computation of the Helicopter Fuselage Wake with the SST, SAS, DES and XLES Models

  • F. Le Chuiton
  • A. D’Alascio
  • G. Barakos
  • R. Steijl
  • D. Schwamborn
  • H. Lüdeke
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 97)

Abstract

This paper presents a first industrial attempt at Eurocopter Germany to use DES-like methods to compute the wake behind a helicopter in forward flight. Three codes have been used: TAU (DLR), CFX (Ansys) and HMB (Uni. Liverpool) and four different turbulence models: standard SST and three of its unsteady extensions SAS, DES and XLES. Results for the loads, pressure distribution and skin-friction lines have been compared to each other and against wind tunnel experimental data. These more sophisticated models brought improvements over the base SST but not always markedly and consistently: the drag gets improved although the negative lift on the body departs further form the experimental value. The pressure distribution on the backdoor has been improved by one of the computation. Oil-flow visualisation results show that the mean flow in the region of the backdoor is qualitatively reasonably well captured.

Keywords

Moment Coefficient Forward Flight Wind Tunnel Model Global Load Vortical Wake 
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. Menter, F.R., Egorov, Y.: A Scale-Adaptive Simulation Model using Two-Equation Models. AIAA Paper 2005-1095 (2005)Google Scholar
  2. Schwamborn, D., Gerhold, T., Heinrich, R.: The DLR TAU-Code: Recent Applications in Research and Industry. ECCOMAS CDF (2006)Google Scholar
  3. Steijl, R., Barakos, G.N., Badcock, K.: A Framework for CFD Analysis of Helicopter Rotors in Hover and Forward Flight. Int. Journal of Numerical Methods in Fluids 51, 819–847 (2006)zbMATHCrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • F. Le Chuiton
    • 1
    • 2
  • A. D’Alascio
    • 2
  • G. Barakos
    • 3
  • R. Steijl
    • 3
  • D. Schwamborn
    • 4
  • H. Lüdeke
    • 4
  1. 1.Subcontractor: euro engineering AG 
  2. 2.Eurocopter Deutschland GmbHGermany
  3. 3.University of LiverpoolUK
  4. 4.DLRGermany

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