Accession Number : ADD014892

Title :   Slurry Dispenser.

Descriptive Note : Patent, Filed 28 Feb 72, patented 12 Feb 91,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : McKune, John W ; Musolf, Arnold O ; Hales, Timothy W ; Swanson, Eric D

Report Date : 12 Feb 1991

Pagination or Media Count : 5

Abstract : It is well known that drag of a ship or submarine through the water can be significantly reduced by ejecting a polymer solution over the exterior of the vessel. Polymer solutions must be mixed in extensive quantities in order to achieve this purpose. Present methods for mixing polymer solutions normally use either a powder mixer or a venturi-type slurry dispenser. In the powder mixer a dry polymer powder is metered into a large surface area of water, after which the powder and water are turbulently mixed to provide the polymer solution. This type of mixing tends to form gelatinous lumps in the polymer solution, and continuous maintenance and cleaning are required. Further, this type of mixing is not suitable for shipboard or submarine use because air, usually atmospheric pressure, is required and this pressure is less than the hydrostatic pressure at the polymer solution outlet over the exterior surface of the vessel. The present invention provides a slurry dispenser which overcomes the aforementioned associated with prior art devices. The present invention injects a high-speed thin annular sheet of polymer slurry radially within a liquid stream, such as a stream within a conduit.

Descriptors :   BAROMETRIC PRESSURE, DRAG, DRY MATERIALS, EXTERNAL, HYDROSTATIC PRESSURE, LIQUIDS, MAINTENANCE, MIXING, POLYMERS, POWDERS, SHEETS, SHIPBOARD, SLURRIES, SOLUTIONS(MIXTURES), STREAMS, SUBMARINES, SURFACES, THINNESS, WATER

Subject Categories : Submarine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE