| Popis: |
Suction through porous aircraft wings is a promising concept to reduce its drag, but the modified boundary layer can be more susceptible to external forcing, like surface roughness and inhomogenities in the suction distribution. The disturbance amplitudes triggered by this forcing are quantified by the receptivity coefficients. This paper analyzes the effects of suction on receptivity in the boundary layer and shows its detrimental effects on steady crossflow instabilities, which can be the dominant instabilities in swept-wing boundary layers. Employing a compressible adjoint approach, the receptivity coefficients for a Falkner-Skan-Cooke similarity solution and an A320 vertical tail plane with and without suction are given. |
