Abstracts - KTH Mechanics

128
Oscillating NACA0012 Case 1 Case 2
Mean pitch angle α0 12° 15°
Amplitude of pitch angle oscillation ∆α 6° 10°
Reynolds number 105 0.98.106 Mach number 0.18 0.072
Reduced frequency k= c/(2u ) 0,188 0,1
Three turbulence models in the context of the two-equation modelling
approach are tested separately: the k-and k-models modified by the OES
approach and the classical Menter’s shear stress transport model.
Figure 1 : Vorticity contours, Case 2,
α=8.4°, pitching up, k- /OES
model
Figure 2 : Vorticity contours, Case 2,
α=23.7°, pitching down, SST model
a b