Magnetohydrodynamic boundary layer control system
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.
- Publication:
-
Patent Department of the Navy
- Pub Date:
- December 1993
- Bibcode:
- 1993navy.reptW....M
- Keywords:
-
- Active Control;
- Boundary Layer Control;
- Boundary Layer Flow;
- Electrodes;
- Hulls (Structures);
- Lorentz Force;
- Magnetohydrodynamics;
- Magnets;
- Sea Water;
- Electric Fields;
- Magnetic Fields;
- Noise Reduction;
- Patents;
- Turbulence;
- Turbulent Boundary Layer;
- Fluid Mechanics and Heat Transfer