A numerical study of instability-wave control through periodic wall suction/blowing

A numerical model of instability-wave control in a laminar boundary through periodic wall suction/blowing has been demonstrated using wave superposition. The Orr-Sommerfield equation is solved subject to a prescribed surface normal velocity distribution. In the double surface velocity perturbation the second wave is calculated to be 180 degrees out of phase with the first. Complete cancellation of the initial wave was not achieved, but the wave amplitude was significantly dampened. The simplicity of introducing surface perturbations in the analysis suggests its application to the evaluation of a variety of normal velocity distributions, and the extension of the methodology to the reduction of aerodynamic or hydrodynamic drag.