Accession Number : ADD015883

Title :   Ship Wake Vorticity Suppressor.

Descriptive Note : Patent, Filed 17 Apr 92, patented 29 Jun 93,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Furey, Roger J

Report Date : 29 Jun 1993

Pagination or Media Count : 8

Abstract : In accordance with the present invention, a device to suction off the portion of the boundary layer closest to the hull and expel it alongside the ship is provided. The invention comprises a casing mounted in substantially parallel spaced alignment to the ship hull for diverting the portion of the ship boundary layer in immediate proximity to the underwater hull, at least one pump in communication with the casing for drawing up water from the ship boundary layer that enters into the casing, and at least one outlet nozzle in communication with the pump for expelling the water alongside the hull. The invention removes the portion of the fluid with the highest concentration of vorticity thereby removing the mechanism by which the 'inverse bubbles' and floating drops persist far downstream of the ship's stern and thus suppressing the source of the most detectable features of the ship's wake radar image.

Descriptors :   *PUMPS, *WAKE, *PATENTS, *SUPPRESSORS, *SHIP SIGNATURES, *RADAR COUNTERMEASURES, ALIGNMENT, BOUNDARY LAYER, BUBBLES, DROPS, INVENTIONS, NOZZLES, RADAR, RADAR IMAGES, SHIP HULLS, SUCTION, UNDERWATER, PUMP COMPONENTS, WATER PUMPS, VORTICES, INFRARED SIGNATURES, INFRARED COUNTERMEASURES, SYNTHETIC APERTURE RADAR

Subject Categories : Radar Countermeasures
      Active & Passive Radar Detection & Equipment
      Pumps, Filters, Pipes, Tubing, Fittings & Vlvs

Distribution Statement : APPROVED FOR PUBLIC RELEASE