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AssigneeThe United States of America as represented by the Secretary of the Navy
InventorAnish J. Sydney
Estimating the term…
A fluid-dynamic test device is implementable in a fluid tunnel such as a wind tunnel or water tunnel. The exemplary inventive device features an outer case and four foils connected to and projecting inward from the case, wherein each foil is rotatable about its spanwise axis and is thus positionable at a selected angle of attack with respect to current generated in the tunnel. The respective axes or span-lines of the four foils lie in a vertical geometric plane in a crisscross configuration, each axis/span-line directed inward toward the point in the vertical plane that is centric relative to the case. Two axes/span-lines are aligned in a horizontal direction, and two axes/span-lines are aligned in a vertical direction. Generated current passes through the inventive device at perpendiculars to the vertical plane, thereby forming a wake that is predominately characterized by mutually interactive tip vortices corresponding to the four foils.
An apparatus for fluid dynamic testing, the apparatus comprising four fluid foils and a housing for said four fluid foils, each said fluid foil characterized by a fluid foil axis about which said fluid foil is pivotable, said housing characterized by a Cartesian geometric plane having an x-axis and a y-axis that intersect at a center point, two of said fluid foils situate whereby the corresponding said fluid foil axis coincides with said x-axis, two of said fluid foils situate whereby the corresponding said fluid foil axis coincides with said y-axis.
A fluid dynamic testing device suitable for use in a fluid tunnel, the fluid dynamic testing device comprising a casing and four fluid foils attached to said casing, each said fluid foil being characterized by a fluid foil axis and being capable of rotation about said fluid foil axis, wherein the respective said fluid foil axes of said four fluid foils are coplanar and are arranged at right angles to each other, the respective said fluid foil axes of two said fluid foils being horizontally aligned, the respective said fluid foil axes of two said fluid foils being vertically aligned.
A vortex generation device comprising:
Dependencies are inferred from the claim text.