Method and device for reducing friction on a navigating vehicle

Details Method and device for reducing friction on a navigating vehicle Method and device for reducing friction on a navigating vehicle

1994-12-21

1996-11-19

Basinger, Sherman

Ships

Building

Antifriction surfaces

B63B 138

Patent

active

055752322

ABSTRACT:
A method for reducing the frictional resistance of a navigating vehicle, and a method for generating micro-bubbles for reducing the friction of the navigating vehicle and an apparatus therefor. The friction reduction is achieved with the expenditure of a small amount of energy, thereby improving the overall energy efficiency for operating the ship. An air bubble/water mixture is injected towards the stern of the ship, at an inclined angle to the underwater surface, into a boundary layer formed in the vicinity of the underwater surface of the ship. The friction reduction is effectively performed because of the dynamic energy of the water, being a larger mass than air, enables the gas-including mixture to be injected over a longer distance into the boundary layer than in the case of air bubbles alone.

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European Search Report dated Sep. 7, 1995.

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