Sensitivity of Transonic Flow past a Symmetric Airfoil to Free-Stream Perturbations

Alexander Kuzmin (1) , Ryabinin Anatoly (1)

1 Laboratory of Aerodynamics

Turbulent transonic flow past a flat-sided symmetric airfoil with an elliptic nose is studied numerically. Solutions of the RANS equations are obtained with ANSYS CFX-13 solver using SSG Reynolds-stress and k-omega SST turbulence models. The solutions reveal flow bifurcations in a narrow band of the free-stream Mach number at zero angle of attack. Flow sensitivity to both stationary and time-dependent variations of the angle of attack is analyzed.

Mots clés: Local supersonic regions; shock waves; instability; bifurcations; self-exciting oscillations

Domaines: Mécanique des fluides [physics.class-ph]; Mécanique des fluides [physics.class-ph]

Alexander Kuzmin, Ryabinin Anatoly. Sensitivity of Transonic Flow past a Symmetric Airfoil to Free-Stream Perturbations. 2011. ⟨hal-00648215⟩