Abstract
Two-dimensional numerical simulation is carried out to investigate the leading edge receptivity of a at-plate boundary layer. It is shown that velocity fluctuations inside the boundary layer at an elliptic leading edge is suppressed by changing the local viscosity limited to velocity fluctuations. The amplitude of the velocity fluctuation in the boundary layer increases rapidly right after the junction between the elliptic leading edge and the at plate, which also depends on the frequency of the vortical disturbances given upstream.
