Accession Number : ADD018417

Title :   Buoyant Test Vehicle Polymer Ejection Nose Assembly.

Descriptive Note : Patent, Filed 16 Jan 96, patented 18 Feb 97,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Nedderman, William H ; Meunier, Robert

Report Date : 18 Feb 1997

Pagination or Media Count : 8

Abstract : An underwater vehicle has a generally cylindrically portion with boundary layer polymer fluid storage and a pressurizing source provided therein, and a nose portion secured to the cylindrical portion and capable of being reconfigured for ejecting the polymer fluid from the nose adjacent the centerline of the vehicle or from the area of minimum pressure adjacent the juncture between the nose of the vehicle and the cylindrical portion. The nose portion can be reconfigured without breaking down the joint between the nose portion and the cylindrical portion of the vehicle. A removable plug is provided for isolating nose ejector ports, and a removable channel blocking dam is provided for isolating the ports provided in the area of minimum pressure adjacent the joint between the nose portion and the cylindrical portion of the vehicle. Further, the nose ejector ports are defined in a removable nose cap subassembly and a removable annular subassembly defines the ejector ports in the area of minimum pressure. Flexibility is further provided in that the forward nose and more rearward ejection configurations can be selected from a variety of such configurations to allow testing of different port configurations, sizes and slot shapes without replacing the entire nose portion of the vehicle.

Descriptors :   *UNDERWATER VEHICLES, *POLYMERS, *EJECTION, *BUOYANCY, *PATENTS, FORWARD AREAS, BOUNDARY LAYER, CYLINDRICAL BODIES, CONFIGURATIONS, FLUIDS, PRESSURIZATION, STORAGE, DRAG REDUCTION

Subject Categories : Polymer Chemistry
      Submarine Engineering
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE