Generation of bubbles for friction-reducing ship and method for reducing skin-friction
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United States of America Patent
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Jul 25, 2000
Grant Date -
N/A
app pub date -
Jul 6, 1998
filing date -
Aug 1, 1997
priority date (Note) -
Expired
status (Latency Note)
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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.
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