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Sökning: WFRF:(Thiele H) > Konferensbidrag

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  • Weinkauf, Tino, 1974-, et al. (författare)
  • Feature-based Analysis of a Multi-Parameter Flow Simulation
  • 2008
  • Ingår i: Proc. SimVis 2008. ; , s. 237-251
  • Konferensbidrag (refereegranskat)abstract
    • In our work we examine a high-dimensional, massive flow data set around an airfoil using a topology-based vortex analysis. The 3D time-dependent flow depends on two additional parameters which are introduced by an active flow control technique aiming at increasing the lift by periodic blowing and suction. In particular, we study the influence of the actuation parameters frequency and intensity of air injection and show how our vortex analysis helps in understanding the underlying physics.
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  • Günther, B., et al. (författare)
  • Control of Separation on the Flap of a Three-Element High-Lift Configuration
  • 2007
  • Ingår i: 45th AIAA Aerospace Sciences Meeting and Exhibit. - : AIAA. - 9781563478901
  • Konferensbidrag (refereegranskat)abstract
    • This paper describes a joint experimental and numerical investigation of the control of the flow over the flap of a three-element high-lift configuration by means of periodic excitation. At Reynolds numbers between 0.3 ï¿œ 106 and 1 ï¿œ 106 the flow is influenced by periodic blowing or periodic blowing/suction through slots near the flap leading edge. The delay of flow separation by periodic vertical excitation could be identified in the experiments as well as numerical simulations based on the Unsteady Reynolds-averaged Navier-Stokes equations (URANS). As a result, the mean aerodynamic lift of this practically relevant wing configuration could be significantly enhanced. By investigating different excitation frequencies and intensities optimum control parameters could be found. The behaviour of the aerodynamic forces with varying flap deflection angle are measured on a finite swept wing. Scientific visualisation of the numerical simulations of an infinite swept wing allows a detailed analysis of the structures in this complex flow field and the effect of flow control on these.
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  • Resultat 1-9 av 9

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