Aeronautics and astronautics – Aircraft sustentation – Sustaining airfoils
Patent
1993-12-17
1995-08-01
Grant, William
Aeronautics and astronautics
Aircraft sustentation
Sustaining airfoils
244130, 244204, B64C 2100, F15D 112
Patent
active
054374219
ABSTRACT:
The boundary layer of a fluid travelling in a mean-flow direction relative to a surface of a wall of a body is controlled by generating in the fluid a magnetic field B having flux lines along the surface of the wall and an electric current density J traversing the magnetic flux lines in the fluid to form a control region. The magnetic field B and the electric current density J create in the control region a force J.times.B that can stabilize or destabilize flow in the boundary layer. A plurality of such control regions can be arranged in an two-dimensional array of control tiles that are periodically actuated in a controlled, predetermined pattern at a critical frequency that provides boundary layer control over a given area.
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Brown Garry L.
Nosenchuck Daniel M.
British Technology Group USA Inc.
Grant William
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