Grid details of the NACA0015 Airfoil

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Presentation transcript:

Grid details of the NACA0015 Airfoil 14th of January 2008 Vassili Kitsios The University of Melbourne Université de Poitiers

Controlled with ZNMF-Jet Experimental Study NACA0015 with a ZNMF-Jet spanning entire leading edge normal to surface Key features Unsteady Laminar Separation Bubble (LSB) on suction surface ZNMF Jet used to reattach the flow Uncontrolled Controlled with ZNMF-Jet (Tuck & Soria 2004)

Experimental Study: Parameterisation Definition Range Explored in Experiments Greatest Lift Enhancement Re F+ cμ VR α Note: In the forthcoming LES model

Large Eddy Simulation (LES) Using Unstructured LES code CDP developed at Stanford CTR 3-D Dynamic Smagorinsky C-type Grid Configuration Domain size: (LC, LN, LZ) = (28c, 6c, 0.25c) Cell count: (NC, NN, NZ) = (650, 80, 128) ~6.6 Million Cells C N

Large Eddy Simulation (LES) Using Unstructured LES code CDP developed at Stanford CTR 3-D Dynamic Smagorinsky C-type Grid Configuration

LES: Viscous Cell Sizes On suction side of airfoil ∆x+ < 20 ∆y+ < 1 ∆z+ < 10

LES: Uncontrolled Streamlines α=18o The following comparison is for NZ= 40 as the NZ= 128 case is not yet statistically stationary Integrated forces agree with the measurements to within experimental error Qualitatively agreement of flow field PIV LES (NZ = 8) Taken at mid plane of airfoil