Numerical simulation of transonic shock oscillations on a supercritical airfoil

Detached eddy simulation(DES)method was applied to study the self-sustained shock oscillations phenomenon of SC (2) -0714 supercritical airfoil in this paper. The periodic shock motion on the upper surface of the airfoil was predicted using the two-dimensional DES method in present calculation. The effects of Reynolds number (Re) on the reduced frequency of the shock motion, mean shock position and coefficients of fluctuation pressures were also studied in the paper. The results show that Reynolds number has a non-linear influence on shock oscillation motion character. Compared with Re=15×10⁶ and Re=30×10⁶ flow condition, the shock oscillation character in case of Re=6×10⁶ condition is obviously different.