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.

  • Supplemental Notes:
    • Filed 17 Apr 92 patented 29 Jun 93; Supersedes PAT-APPL-7-870 082.; This Government-owned invention available for U.S. licensing and, possibly, for foreign licensing. Copy of patent available Commissioner of Patents, Washington, DC 20231.; Patent
  • Corporate Authors:

    Department of the Navy

    Washington, DC  United States 
  • Authors:
    • Furey, R J
  • Publication Date: 0


  • English

Media Info

  • Pagination: 8 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00666557
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: PAT-APPL-7-870 082; PATENT-5 222 455
  • Files: TRIS
  • Created Date: Oct 3 1994 12:00AM