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

2. 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)

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

4. 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

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

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

7. 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