초록 ▼

A method for controlling microturbulence in a medium flowing near a surface s disclosed. The method includes the steps of measuring the forces acting near or on the surface and using those measurements to determine the state probabilities for the microturbulent events occurring at the surface. The c

A method for controlling microturbulence in a medium flowing near a surface s disclosed. The method includes the steps of measuring the forces acting near or on the surface and using those measurements to determine the state probabilities for the microturbulent events occurring at the surface. The control method then activates selective cells in an array of cells to apply forces at the surface to counteract the microturbulent events and thus reduce turbulence. Each cell has a pair of electrodes and opposing magnetic poles such that when the control method activates a cell, the interaction of the electric field and the magnetic field at the cell creates a Lorentz force normal to the surface.

대표청구항 ▼

[ What is claimed is:] [1.] A method for controlling microturbulence within a medium at a surface exposed to the medium, the microturbulence resulting from the action of microturbulent events at the surface, the method comprising the steps of:experimentally determining arrival rates for microturbule

[ What is claimed is:] [1.] A method for controlling microturbulence within a medium at a surface exposed to the medium, the microturbulence resulting from the action of microturbulent events at the surface, the method comprising the steps of:experimentally determining arrival rates for microturbulent low-speed streak events, microturbulent sweep events, microturbulent ejection events and microturbulent burst events;determining limiting state probabilities for the microturbulent events using the relationship ]EQU6 ] where p.sub.l, p.sub.s and p.sub.e are the limiting state probabilities for the microturbulent low-speed streak events, the microturbulent sweep events and the microturbulent ejection events, respectively, and where .mu..sub.l, .mu..sub.s, .mu..sub.e and .mu..sub.b are the experimentally determined arrival rates for the microturbulent low-speed streak events, the microturbulent sweep events, the microturbulent ejection events and the microturbulent burst events, respectively;measuring flow characteristics of the medium;estimating discrete state probabilities of microturbulent events based on the limiting state probabilities, the measured flow characteristics and the relationship ]EQU7 ] applying force in opposition to the microturbulent events at points on the surface and at times, as indicated by the discrete probabilities, that will reduce the microturbulence resulting from the action of the microturbulent events.