Accession Number : ADD016485

Title :   Superconducting Electromagnetic Thruster.

Descriptive Note : Patent, Filed 11 Feb 93, patented 2 Aug 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Meng, James C

Report Date : 02 Aug 1994

Pagination or Media Count : 15

Abstract : An electromagnetic thruster for marine vehicles using a jet of water driven by the interaction of a mutually perpendicular intensified magnetic field and an intensified electric field is disclosed. The intensified magnetic field is produced by superconducting coils cooled by a coolant such as liquid helium. An intensified electric field is produced by passing high amperage current across the seawater jet. These interacting fields produce a Lorentz force perpendicular to mutually perpendicular electric and magnetic field vectors which is used to drive the seawater jet. In some embodiments, the force may also be used to draw water into the jet from the boundary layer flow around the vehicle thereby reducing boundary layer turbulence and associated radiated noise.

Descriptors :   *PATENTS, *ELECTROMAGNETIC DRIVES, *MARINE PROPULSION, *THRUSTERS, BOUNDARY LAYER FLOW, COILS, SUPERCONDUCTIVITY, COOLANTS, ELECTRIC FIELDS, JET FLOW, MAGNETOHYDRODYNAMICS, LIQUID HELIUM, LORENTZ FORCE, MAGNETIC FIELDS, RADIATED NOISE, TURBULENCE, SEA WATER

Subject Categories : Jet and Gas Turbine Engines
      Marine Engineering
      Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE