Abstract: A sunroof wind deflector for a vehicle includes a leading edge, a trailing edge and an outer surface extending between the leading edge and the trailing edge. The outer surface has a radius of curvature that changes along a length thereof so as to attenuate shear layer spreading.

Abstract: A self adjusting flap is disclosed. The self adjusting flap comprises a solid body including a hinge. The flap includes a flexible skin stretched across an array of equi-spaced ridges on a convex surface of the hinged solid body, such that lift and drag forces due to fluid flow across it causes the flap to rotate about the hinge and automatically orient itself to minimize flow losses through turbulence while shielding objects downstream from flow induced drag.

Abstract: A flexible composite sheet (FCS) comprising a membrane, a substrate coupled to the membrane, and a plurality of ridges coupled between the membrane and the substrate, wherein a vibratory motion is induced from the flow to at least one segment of a membrane spanning a distance s, wherein the vibratory motion is reflected from at least one segment of the membrane to the flow, and wherein a reduction in fluctuations is caused in the flow pressure gradient and freestream velocity U at all frequencies except around f, where f?U/s. When coupled to a heat exchanger fin, the FCS can enhance heat transfer without enhancing flow pressure drop. The FCS has other flow control applications, such as a drag reduction when coupled to an aircraft wing.