Device for Interactive Turbulence Control in Boundary Layers.
Patent, Filed 7 Jul 1997, patented 24 Aug 1999,
DEPARTMENT OF THE NAVY WASHINGTON DC
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An electro-magnetohydrodynamic EMHD transducer that detects and manipulates the velocity of a near wall fluid below a turbulent boundary layer includes a magnetic field generator to provide a magnetic field near a surface exposed to the fluid. A pair of spaced electrodes are disposed within the magnetic field. A controller coupled to the electrodes detects the electric field induced by the motion of a conductive fluid relative to the surface The controller selectively activates the electrodes to generate an applied electric field between the electrodes when the detected field exceeds a threshold. The Lorentz force generated in response to the applied electric field and the magnetic field either decelerates or accelerates the motion of the conductive fluid to prevent the formation of turbulent events.
- Fluid Mechanics