Accession Number : ADD016516

Title :   Elastic Micro-Fabricated Surface Layer for Reducing Turbulence and Drag on an Object While It Moves Through a Fluid Medium.

Descriptive Note : Patent, Filed 1 Jun 93, patented 13 Sep 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Bandyopadhyay, Promode R

Report Date : 13 Sep 1994

Pagination or Media Count : 8

Abstract : A surface for use in connection with an object in relative motion through a fluid medium includes a plurality of surface elements arranged in rows on the surface, with surface elements of each row being arranged generally orthogonal to the direction of relative motion of the object in a medium. Each surface element includes means defining a cavity, the means including a bottom surface layer, sidewalls, and an upper lip supported along an upstream edge in a cantilevered manner and extending in a downstream direction over the cavity to define a gap permitting fluid communication between the medium and the cavity. The lip is flexible so as to facilitate deflection in response to differentials between pressure inside the cavity and outside the cavity. The cavities of the surface elements in each row are interconnected by means of passageways thereby to facilitate fluid communication therebetween.

Descriptors :   *MOTION, *DRAG REDUCTION, *FLUID FLOW, BOTTOM, CAVITIES, EDGES, FLUIDS, LAYERS, SURFACES, PATENTS

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE