Mitigation of transonic shock buffet on a supercritical airfoil through wavy leading edges

Mitigation of the shock buffet phenomenon over a supercritical airfoil by means wavy leading edges (WLEs) is analyzed with implicit large eddy simulations. A Dassault Aviation's V2C simulated in transonic flow Re?=5.0×105 and M?=0.7 at ?=7.0°. This profile designed for flows, delaying onset wave drag decreasing skin friction drag. The results this upstream condition on straight are oscillation lift coefficients. In first part, time-averaged aerodynamic characteristics edge (SLE) three modified airfoils different amplitudes compared. show that overall WLE more efficient than SLE ones, lowest amplitude (h = 0.0075) most efficient, increasing coefficient coefficient. Flow unsteadiness plays key role flows moderate high angles attack. Hence, second part paper detailed unsteady analysis phenomena. starting point an investigation performance. It observed capable significantly low-frequency oscillations' amplitude, identified buffet. best performance obtained h 0.0125 where high-frequency becomes dominant phenomenon. High-frequency oscillations through application frequency filtering method to field. proved related vortex shedding, while one laminar separation bubble (LSB) breathing. Overall, shows connection between LSB breathing phenomena identifies as parameter control relation mitigate