Millet's Theory in Spanwise-Varying Flow Conditions

Development of aerodynamic theories started in the mid-1920s with models dealing with airfoils of infinite span, zero angle of attack, and without camber, in uniform parallel incompressible flows. Upstream flow nonhomogeneities are assumed to be frozen and convected at mean flow velocity. Considering only small-amplitude disturbances, 'the unsteady aerodynamical problem can be linearized with respect to the steady mean flow.