Apparatus and method for reducing fluid drag on a submerged...

Details Apparatus and method for reducing fluid drag on a submerged... Apparatus and method for reducing fluid drag on a submerged...

B - Operations, Transporting

63

B

B63B 1/34 (2006.01)

Patent

CA 2640360

An apparatus and method for reducing surface friction drag on the hull of a surface vessel by entraining air into water flowing in the boundary layer flow along the hull. The apparatus creates a reduced pressure region by diverting a first portion of the flow away from the surface of the hull. An air pocket is formed in the reduced pressure region and a second portion of the flow is directed through the air pocket by nozzles, which acts as a plunging jet and entrains air into the boundary layer.

L~invention concerne un appareil et un procédé de réduction de la traînée de frottement superficiel sur la coque d'un navire de surface agissant en entraînant de l'air dans l'eau s'écoulant dans la zone de couche limite le long de la coque. L'appareil crée une région de pression réduite en déviant une première partie de l'écoulement à l'écart de la surface de la coque. Une poche d'air est formée dans la région de pression réduite, et une deuxième partie de l'écoulement est dirigée à travers la poche d'air par des buses et agit comme un jet plongeant, entraînant de l'air dans la couche limite.

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