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Numerical Investigation of the Influence of Shock Control Bumps on the Buffet Characteristics of a Transonic Airfoil

  • Steffen BogdanskiEmail author
  • Klemens Nübler
  • Thorsten Lutz
  • Ewald Krämer
Chapter
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 124)

Abstract

This article presents a numerical investigation on the influence of three-dimensional shock control bumps (SCB) on the effect of transonic buffet. Three different types of SCBs are generated by an optimization for low drag in steady flow conditions at a medium lift coefficient. The impact of these SCB types is then investigated for two different Mach numbers with steady and unsteady RANS methods. It will be shown that all SCBs worsen buffet in terms of buffet onset and buffet amplitudes and shift the shock upstream. The impact is largely independent of the Mach number. Vortex strength and amount of separation in steady conditions are only poor indicators for the buffet inhibition potential of the bumps.

Keywords

Numerical fluid dynamics Transonic buffet Shock control bumps 

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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • Steffen Bogdanski
    • 1
    Email author
  • Klemens Nübler
    • 1
  • Thorsten Lutz
    • 1
  • Ewald Krämer
    • 1
  1. 1.Institute of Aerodynamics and Gas DynamicsUniversity of Stuttgart StuttgartGermany

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