Accession Number : ADD015716

Title :   Superconducting Electromagnetic Thruster.

Descriptive Note : Patent Application, Filed 11 Feb 93,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Meng, James

Report Date : 11 Feb 1993

Pagination or Media Count : 25

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 :   *MARINE PROPULSION, *PATENT APPLICATIONS, *MAGNETOHYDRODYNAMIC GENERATORS, *THRUSTERS, BOUNDARIES, BOUNDARY LAYER, BOUNDARY LAYER FLOW, COILS, ELECTROMAGNETIC PROPERTIES, COOLANTS, DRIVES, ELECTRIC FIELDS, FLOW, HELIUM, INTERACTIONS, LAYERS, LIQUID HELIUM, LIQUIDS, LORENTZ FORCE, MAGNETIC FIELDS, NOISE, RADIATED NOISE, THRUSTERS, TURBULENCE, WATER

Subject Categories : Marine Engineering
      Electric Power Production and Distribution

Distribution Statement : APPROVED FOR PUBLIC RELEASE