Theory and results are presented on transition control using steady suction to suppress convectively unstable disturbances in a growing boundary layer on infinite swept wings. The suction profiles are computed using optimal control theory and the optimization process is gradient based. Here, the gradient is evaluated using the adjoint of the parabolized stability equations and the adjoint of the boundary layer equations. Results are presented for an application of the theory on a wing-profile designed for medium range commercial aircrafts.

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