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...

2007-08-14

2009-10-06

Olson, Lars A (Department: 3617)

Ships

Building

Antifriction surfaces

C244S207000

Reexamination Certificate

active

07597060

ABSTRACT:
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.

REFERENCES:
patent: 5452676 (1995-09-01), Fiore
patent: 6125781 (2000-10-01), White
patent: 6789491 (2004-09-01), Takahashi et al.
patent: 7267067 (2007-09-01), Stubblefield et al.
patent: 2001/0022152 (2001-09-01), Takahashi
patent: 2002/0029731 (2002-03-01), Takahashi
patent: 2003/0097971 (2003-05-01), Takahashi

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