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...

2007-09-11

2007-09-11

Sotelo, Jesus D (Department: 3617)

Ships

Building

Antifriction surfaces

C244S207000

Reexamination Certificate

active

10905751

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.

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patent: 6789491 (2004-09-01), Takahashi et al.
patent: 2001/0022152 (2001-09-01), Takahashi
patent: 2002/0029731 (2002-03-01), Takahashi
patent: 2003/0097971 (2003-05-01), Takahashi
patent: 60025598 (1985-02-01), None
PCT International Search Report for International Application No. PCT/US2006/009978 and Written Opinion of the International Searching Authority, mailed Oct. 24, 2006.

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