METHOD AND APPARATUS FOR REDUCING DISSIPATION RATE OF FLUID EJECTED INTO BOUNDARY LAYER

Skin friction reduction on a surface moving relative to a fluid can be obtained by ejecting a polymer-water mixture/solution (9) 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...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
1. Verfasser:	BABENKO, VICTOR V
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AMMUNITION APPARATUS FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL BLASTING EQUIPMENT FOR SHIPPING EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOWOF GASES OR LIQUIDS FLUID-PRESSURE ACTUATORS HEATING HYDRAULICS OR PNEUMATICS IN GENERAL LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS PIPE-LINE SYSTEMS PIPE-LINES RELATED EQUIPMENT SHIPS OR OTHER WATERBORNE VESSELS SPRAYING OR ATOMISING IN GENERAL STORING OF DISTRIBUTING GASES OR LIQUIDS TRANSPORTING WEAPONS
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	Skin friction reduction on a surface moving relative to a fluid can be obtained by ejecting a polymer-water mixture/solution (9) 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 (9) 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 an d 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.