Accession Number:

ADD014837

Title:

System for Reducing Drag and Noise of Underwater Vehicles.

Descriptive Note:

Patent, Filed 17 Feb 71, patented 29 Jan 91,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

• Nadolink, Richard H.

Report Date:

1991-01-29

Pagination or Media Count:

5.0

Abstract:

A means and method for simultaneously reducing drag and noise of a high-speed underwater vehicle is provided. Water is admitted through a water intake scoop in the nose of the vehicle and a polymer powder-gas combination is injected into the water stream in the scoop. The water, polymer and gas are mixed in a mixing chamber into which the scoop empties and are ejected through a circumferential ejector disposed at the minimum pressure point.

Descriptors:

• CHAMBERS
• DRAG
• INTAKE VALVES
• MIXING
• NOISE
• NOSES
• PRESSURE
• SCOOPS
• STREAMS
• UNDERWATER VEHICLES
• VEHICLES
• WATER

Subject Categories:

• Submarine Engineering
• Fluid Mechanics
• Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE