Generation of bubbles for friction-reducing ship and method for

Details Generation of bubbles for friction-reducing ship and method for Generation of bubbles for friction-reducing ship and method for

1998-07-06

2000-07-25

Avila, Stephen

Ships

Building

Antifriction surfaces

B63B 134

Patent

active

060924802

ABSTRACT:
A method is provided for reducing skin-friction of a ship moving through bubbly flow fields generated in proximity of hull surfaces by jetting gas through a plurality of jet nozzles provided on hull surfaces of the ship. The gas flow rate is controlled so as to establish a peak void fraction in a turbulent boundary layer, by applying an observation that the location of a peak void fraction shifts away in a direction normal to the hull surface with increasing gas flow rate through the jet nozzles.

REFERENCES:
patent: 5575232 (1996-11-01), Kato et al.
patent: 5803410 (1998-09-01), Hwang

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