Accession Number : ADD016120

Title :   Magnetohydrodynamic Boundary Layer Control System.

Descriptive Note : Patent, Filed 11 Feb 93, patented 28 Dec 93,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Meng, James C

Report Date : 28 Dec 1993

Pagination or Media Count : 6

Abstract : An active boundary layer control system for marine vehicles is disclosed. The boundary layer control system comprises a plurality of magnets and seawater electrodes placed in circumferential rows around the beam of the hull. The magnets and electrodes are positioned so that a Lorentz force generated by the interacting magnetic and electric fields will drive the boundary layer flow in an axial direction toward the aft end of the bull. The boundary control system reduces turbulence and may relaminarize boundary layer flow, thereby reducing radiated noise.

Descriptors :   *BOUNDARY LAYER CONTROL, *MAGNETOHYDRODYNAMICS, BOUNDARY LAYER, BOUNDARY LAYER FLOW, CONTROL SYSTEMS, DRIVES, ELECTRIC FIELDS, ELECTRODES, LAYERS, LORENTZ FORCE, MAGNETS, NOISE, RADIATED NOISE, TURBULENCE, TURBULENT BOUNDARY LAYER, PATENTS, INTERACTIONS, SEA WATER, NOISE REDUCTION, MAGNETIC FIELDS

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE