Fluid handling – Processes – Affecting flow by the addition of material or energy
Patent
1998-12-31
2000-10-31
Michalsky, Gerald A.
Fluid handling
Processes
Affecting flow by the addition of material or energy
114 67A, G05D 700
Patent
active
061387045
ABSTRACT:
Skin friction reduction on a surface moving relative to a fluid can be obtained by ejecting a polymer-water mixture/solution into the boundary layer. The efficacy of the ejected polymer-water mixture/solution is closely related to polymer dissipation out of the boundary layer and conditioning (i.e, lengthening, unwinding or stretching) of the polymer molecules by liquid shear forces immediately before ejection. The invention is a method and apparatus for conditioning and ejecting a polymer-water mixture/solution that improves drag reduction characteristics of the mixture/solution and maintains the mixture/solution in the boundary layer for as long as possible. By improving the drag-reduction characteristics of the polymer-water mixture/solution and by extending the time it remains in the near-wall region, the ejector can increase the performance and reduce the volume and storage requirements of a drag-reduction system. Although this invention was intended for polymer-water mixture/solution ejection, it can be used for ejection of any substance into a flowing fluid.
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Arnold Bruce Y.
Cortana Corporation
Michalsky Gerald A.
LandOfFree
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